ADC Network Card H2TU C 319 List 4E User Manual

1. H2TU-C-319 List 4E Front Panel ...................................................................................................................3

2. Installing the H2TU-C-319 List 4E into a Shelf .............................................................................................8

3. Logon Screen.................................................................................................................................................13

4. Config Menu - Date and Time.......................................................................................................................14

5. Inventory Screen............................................................................................................................................15

6. Config Menu..................................................................................................................................................16

7. Config Menu - Standard Options (defaults shown).......................................................................................17

8. Config Menu - ADC Options (defaults shown) ............................................................................................17

9. Metallic Test Access Block Diagra m............................................................................................................28

10. MTA Relays ..................................................................................................................................................29

11. Metallic Test Access TB6 on HMS-358 Backplane......................................................................................29

12. H2TU-C-319 List 4E Block Diagram ...........................................................................................................30

13. Config Menu - Reset to Factory Defaults......................................................................................................32

14. Config Menu - Master Clear..........................................................................................................................33

15. Monitor Screen - Active Loopback with Alarms ..........................................................................................35

16. H2TU-R DS1 31-Day Performance History .................................................................................................38

17. H2TU-R DS1 25-Hour Performance History................................................................................................38

18. H2TU-C DS1 48-Hour Performance History................................................................................................39

19. H2TU-C HDSL2 31-Day Performance History............................................................................................40

20. H2TU-C HDSL2 48-Hour Performance History ..........................................................................................40

21. H2TU-C HDSL2 25-Hour Performance History ..........................................................................................41

22. H2TU-R DS1 Current Statistics ....................................................................................................................42

23. H2TU-C DS1 Current Statistics ....................................................................................................................42

24. H2TU-C HDSL2 Current Statistics...............................................................................................................43

25. H2TU-C DS1 Alarm History Screen.............................................................................................................44

26. H2TU-R DS1 Alarm History Screen.............................................................................................................45

27. H2TU-C HDSL2 Alarm History Screen .......................................................................................................46

28. System Event Log..........................................................................................................................................48

29. Report Menu - Full Report ............................................................................................................................50

30. H2TU-R LOS and AIS Response Priorities ..................................................................................................54

31. Loopback Summary.......................................................................................................................................55

32. Loopback Modes ...........................................................................................................................................60

33. H2TU-C-319 List 4E Card-Edge Connector.................................................................................................68

34. HMS-358 Backplane H2TU-C-319 List 4E Card Edge Connector Labeling ...............................................69

35. RS-232 Craft Port Pinout s.............................................................................................................................71

36. H2TU-C-319 List 4E Block Diagram ...........................................................................................................72

H2TU-C-319 List 4E

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List of Tables

LTPH-UM-1049-02, Issue 2

LIST OF TABLES

1. Front-Panel Description .................................................................................................................................. 4

2. Front-Panel Display Message s........................................................................................................................ 5

3. Navigational Keys for the HiGain HDSL2 Maintenance Terminal Screens ................................................ 12

4. Logon Screen Menus..................................................................................................................................... 13

5. H2TU-C-319 List 4E Standard Config Menu Options ................................................................................. 18

6. H2TU-C-319 List 4E ADC Config Menu Options....................................................................................... 19

7. DS1 and DSX-1 24-hour PM Threshol d....................................................................................................... 22

8. Response to H2TU-R DS1 Frame Conversion Options................................................................................ 24

9. Extended SuperFrame Format....................................................................................................................... 25

10. SuperFrame Format....................................................................................................................................... 25

11. DDS NI and DS0 DP Latching Loopback Sequenc e.................................................................................... 26

12. HiGain HDSL2 Loopback vs. Latching Sequence ....................................................................................... 26

13. Response of H2TU-C-319 List 4E and H2TU-R to LOS and AIS............................................................... 27

14. Monitor Screen Descriptions......................................................................................................................... 36

15. Error Acronyms Used on the DS1 Performance History Screens................................................................. 39

16. Error Acronyms Used on the HDSL2 Performance History Screens ........................................................... 41

17. DS1 Alarm Descriptions ............................................................................................................................... 45

18. HDSL2 Alarm Descriptions.......................................................................................................................... 47

19. Event Log Entry Messages List .................................................................................................................... 49

20. Report Types ................................................................................................................................................. 51

21. Front-Panel System Alarms Summary.......................................................................................................... 52

22. Summary of HiGain HDSL2 Generic Loopback Codes and Activation Methods ....................................... 56

23. Addressable Repeater Loopback Commands (A2LB ).................................................................................. 61

24. Addressable Repeater Loopback Commands (A3LB and A4LB) ................................................................ 64

25. SmartJack Loopup and Loopdown Commands ............................................................................................ 64

26. H2TU-C-319 List 4E Power Parameters....................................................................................................... 66

27. HDSL2 Reach Chart ..................................................................................................................................... 67

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LTPH-UM-1049-02, Issue 2

Overview

OVERVIEW

The H2TU-C-319 List 4E (H2TU-C) line unit is the Central Office (CO) side of a T1 transmission system. The

HiGain HDSL2 product family is fully compliant with the HDSL2 standard ANSI T1.418. Providing full-rate T1

access using a single copper pair, HDSL2 is a cost-effective solution that offers an open architecture. The open

architecture inherent in HDSL2 guarantees interoperability allowing simple and economic accommodation of

network growth.

HiGain HDSL2 products provide 1.552 Mbps transmission on one unconditioned copper pair over the full Carrier

Service Area (CSA) range. The CSA includes loops up to 12,000 feet of 24 AWG wire or 9,000 feet of 26 AWG

wire, including bridged taps.

FEATURES

Features specific to the List 4E family of HDSL2 modules include:

•

Report menu option for downloading status and performance monitoring data to a file

Enhanced loopback commands controlled by the SmartJack Loopback (LPBK) option as follows:

–

100 in-band loopdown command

100000 (1-in-6) in-band loopup command

•

Connection of the HDSL2 span to Loop 2 on pins K and 9 rather than on Loop 1, pins F and 6

Sources sealing current when connected to an H2TU-R-402 List 5E or higher

Standard features include:

•

HDSL2 transmission features

–

Lightning and power cross-protection on HDSL2 interfaces

Full-duplex HDSL2 transmission on one pair at 1.552 Mbps

Ultra-low wander (Stratum 1 compliant)

Grounded loop detection on High-bit-rate Digital Subscriber Line 2 (HDSL2)

•

Front-panel provisioning features

–

Four character status display

DS1 splitting and bridge access

Status Light Emitting Diodes (LEDs)

RS-232 craft port for connection to a maintenance terminal

MODE and LBK pushbuttons

•

Maintenance screens for inventory, provisioning, and troubleshooting

–

DS1 and HDSL2 performance monitoring

Non-volatile performance monitoring

Performance Report Messaging (PRM) support for Supplemental PRM (SPRM) and Network PRM

(NPRM) at the H2TU-R

–

Payload (PL) and HiGain (HG) loopback source identification

Margin Alarm (MAL) threshold

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Overview

LTPH-UM-1049-02, Issue 2

•

Configuration options

–

Selectable DS1 pre-equalizer

Bipolar Violation Transparency (BPVT) options

Bit Error Rate (BER) alarm

Power Back Off Network (PBON) and Power Back Off Customer (PBOC) options for configuring output

levels

–

Loss of Signal/Alarm Indication Signal (LOS/AIS) payload alarm option

Remote provisioning

•

Compatible with HMS-358 Soneplex^®Wideband 3190 shelves only

Digital Data Service (DDS) latching loopback

Network Management and Administration (NMA) interface

Metallic Test Access (MTA)

Dual DSX-1 port option

DS1 is used throughout this document to refer to either the remote unit’s DS1 interface or the

line unit’s DSX-1 interface.

COMPATIBILITY

The H2TU-C has two unique features, Metallic Test Access and Dual DS1 port options, which are not provided

in standard ADC line units with 3192 mechanics. These features require additional access pins which are provided

by a special card-edge connector, shown in Figure 33 on page 68. Only the HMS-358 set of shelves can

accommodate this special connector.

APPLICATIONS

HiGain HDSL2 systems provide a cost-effective, easy-to-deploy method for delivering T1 High Capacity Digital

Service (HCDS) over a single copper pair. HiGain HDSL2 systems support a multitude of network connections

and system models.

•

The service is deployed over one unconditioned, non-loaded copper pair.

Conventional, inline DS1 repeaters are no longer required.

Cable pair conditioning, pair separation and bridged tap removal are not required.

Each loop has no more than 35 dB of loss at 196 kHz, with driving and terminating impedances of 135Ω. In

general, HiGain HDSL2 systems:

•

Operate effectively in the same cable binder group with other HDSL2 lines, HDSL, T1, ADSL, SDSL, POTS,

DDS, and other transmission schemes.

•

Can be used with customers requiring DS1 service on a temporary or permanent basis.

Provide a means of quickly deploying service in advance of fiber-optic transmission systems.

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LTPH-UM-1049-02, Issue 2

Front Panel

FRONT PANEL

Figure 1 shows the H2TU-C-319 List 4E front panel. Table 1 on page 4 describes the front-panel components. For

pinout diagrams of the H2TU-C-319 List 4E card-edge connector and craft port, refer to “Appendix A -

Specifications ” on page 65.

HiGain

HDSL2

Front-panel display

List number

SETUP

Status LED

System option pushbuttons

STATUS

Card handle

(CLEI code and

ECI bar code label on

DSX-1 access jacks

Craft port

outside of handle)

DCE

Figure 1. H2TU-C-319 List 4E Front Panel

H2TU-C-319 List 4E

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Front Panel

LTPH-UM-1049-02, Issue 2

Table 1. Front-Panel Description

Front-Panel Feature

Function

Front-panel display

Displays four-character status, provisioning, and alarm system messages. The front-panel display

illuminates when power is initially applied. To conserve power the display only remains on for

5 minutes. Using the MODE or LBK pushbuttons reactivates the display and restarts the 5-minute

timer. Refer to Table 2 on page 5 for a listing of the four-character messages.

MODE and LBK system

option pushbuttons

Permits user options to be monitored and modified without the need of a maintenance terminal. Used

to initiate all HiGain loopbacks and test states as well as to display DSX-1 line parameters and line

unit identity.

Status LED

The status LED can report the following conditions:

Off

Line power is off.

Green

Normal operation.

Flashing green

Red

HDSL2 acquisition.

Fuse alarm.

Flashing red

Yellow

Flashing yellow

DSX-1 access jacks

System alarm.

An H2TU-C Customer Remote Loopback (CREM) or a Network Local Loopback (NLOC) is in effect.

H2TU-C is in an Armed state.

BRG

Provides non-intrusive bridging jack access to (IN) and from (OUT) the HDSL2 span at the

MUX DSX-1 interface. Allows the two DS1 payloads to be monitored.

LINE

Provides splitting jack access to (IN) and from (OUT) the HDSL2 span at the MUX DSX-1 interface.

Breaks the IN and OUT paths to permit test signal insertion and retrieval.

Craft port (RS-232)

Provides bidirectional communication between the unit and an external terminal to allow

configuration and performance monitoring through the maintenance terminal screens.

CLEI and ECI bar code label Provides the human-readable Common Language Equipment Identifier (CLEI) code number and the

Equipment Catalog Item (ECI) bar code number.

List number

Identifies the list number of the H2TU-C.

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LTPH-UM-1049-02, Issue 2

Front Panel

Table 2 lists the front-panel display messages. The four-character display reports the code of an alarm, loopback,

or diagnostic message and, in some cases, is followed by a second four-character message that modifies the first

message with a value or current configuration setting.

Table 2. Front-Panel Display Messages

Message

Full Name

Description

ALARM MESSAGES

ACO

Alarm Cut Off

A system alarm has occurred, and has been retired to an ACO

condition by pressing the LBK pushbutton on the H2TU-C front

panel.

ALRM

DBER

HBER

Alarm Condition Exists

DS1 Bit Error Rate

A system alarm condition is in effect.

A system DS1 BER alarm is in effect and remains in effect until cleared.

A system HDSL2 Block Error Rate alarm is in effect.

HDSL2 Block Error Rate

Loop Attenuation

Indicates that the attenuation on the HDSL2 loop has exceeded the

maximum threshold value.

LAIS

Local Alarm Indication Signal

Local Loss of Signal

Indicates an AIS (all ones) pattern is being received or transmitted

at the H2TU-C DS1 input or output ports.

LLOS

Indicates that no signal is detected at the DSX-1 input to the

H2TU-C. Causes a system alarm.

LOSW

MAL

Loss of Sync Word

Margin Alarm

Indicates that the HDSL2 loop has lost synchronization.

The margin on HDSL2 loop has dropped below the threshold

(0 to 15 dB) as set by the operator.

MTA

Metallic Test Access

Power Feed Ground

Power Feed Open

Power Feed Short

Indicates the H2TU-C is in a metallic test access state.

The HDSL2 loop is grounded.

PWR FEED GND

PWR FEED OPEN

PWR FEED SHRT

PRMF

Indicates a line power open condition.

Indicates a short between the Tip and Ring of the HDSL2 pair.

Performance Report Messaging - Far H2TU-R PRM-FE BER threshold has been exceeded.

End

PRMN

RAIS

Performance Report Messaging - Near H2TU-R PRM-NE BER threshold has been exceeded.

End

Remote Alarm Indication Signal

Indicates an AIS (all ones) pattern is being received or transmitted

at the H2TU-R DS1 input or output ports.

RLOS

RRAI

Remote Loss of Signal

Indicates that no signal is detected at the DS1 input to the H2TU-R.

Causes a system alarm.

Remote RAI—Remote Alarm

Indication at the H2TU-R (Net signal

has errors.)

Indicates an RAI alarm (yellow LED) from the CPE with errors from

the line unit or network.

SPN1

Span Number

Accompanies the LOSW alarm and identifies the span where the

LOSW alarm occurred.

TRCI

Transmit RAI-CI—TX RAI-CI

Upon reception of an RAI (yellow LED) from the CPE, the H2TU-R

sends RAI-CI toward the network if the network signal received at the

Indication - Customer Installation at

the H2TU-R (Net signal does not have H2TU-R is clear. If the network signal is impaired (LOS, AIS, or Loss

errors.)

of Frame [LOF]), then the RAI is automatically passed on to the

network.

TUC

TUR

Transmission Unit Central Office

Transmission Unit Remote End

Accompanies the HBER, MAL, and LA alarm and indicates that the

alarm has occurred at the H2TU-R remote unit.

Accompanies the HBER, MAL, and LA alarm and indicates that the

alarm has occurred at the H2TU-R remote unit.

Continued

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Front Panel

LTPH-UM-1049-02, Issue 2

Table 2. Front-Panel Display Messages (Continued)

Message

Full Name

Description

LOOPBACK MESSAGES

CLOC

Customer Local Loopback

Signal from customer is looped back to the customer at the

H2TU-R.

CREM

NLOC

NREM

SMJK

Customer Remote Loopback

Network Local Loopback

Signal from customer is looped back to the customer at H2TU-C.

DSX-1 signal is looped back to the network at the H2TU-C.

DSX-1 signal is looped back to the network at the H2TU-R.

Network Remote Loopback

Remote SmartJack Loopback

DSX-1 signal is looped back to the network at the H2TU-R

SmartJack module.

DIAGNOSTIC MESSAGES

A = xx

Maximum Loop Attenuation

The Attenuation (A) message appears followed by xx, where xx is

the loop attenuation of the longest (maximum loss) span, measured

in dB.

ACQ

Acquisition

The multiplexers of the H2TU-C and H2TU-R (or the H2TU-C and

first regenerator) are trying to establish synchronization over the

HDSL2 loop of Span 1.

ARM

HiGain System Armed

Armed to respond to Intelligent Repeater Loop (ILR) codes.

BAD RT?

No Response from H2TU-R

The H2TU-C receives no response from the H2TU-R and all HDSL2

loop conditions are normal. Therefore, the integrity of the H2TU-R

or the HDSL2 loop is questionable.

FERR

FLDL

Framing Bit Error Occurred

Flash Download

Framing bit error occurred at H2TU-C DSX-1 input.

Flash download of firmware upgrades. Contact Customer Service

for upgrade procedures (see “Appendix D - Product Support” on

page 75).

HES

HDSL2 CRC Error

H2TU-C HDSL2 Loop Cyclical Redundancy Check (CRC) error.

LBPV

Local Bipolar Violation

A bipolar violation has been received at the DSX-1 input to the

H2TU-C.

M=xx

HDSL2 Loop Margin

Managed

Indicates the power of the received HDSL2 signal relative to noise

(S/N with respect to 21.5 dB). Any value of 6 dB or greater is

adequate for reliable system operation.

MNGD

The H2TU-C is under control of the HMU-319 Network management

unit. In this state, the front-panel craft port and pushbuttons are

disabled.

PWR FEED OFF

Power Feed Off

HDSL2 span power has been turned off by setting the PWFD option

to off, or HDSL2 span power has been turned off by use of the A2LB

Intelligent Office Repeater (IOR) Power Down code.

PWR FEED ON

SIG

Power Feed On

Signaling

Indicates that the HDSL2 loop is not grounded or shorted.

The transceivers of the H2TU-C and H2TU-R (or the H2TU-C and

first regenerator) are trying to establish contact with each other over

the HDSL2 loop of Span 1.

Continued

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H2TU-C-319 List 4E

LTPH-UM-1049-02, Issue 2

Front Panel

Table 2. Front-Panel Display Messages (Continued)

Message

Full Name

Description

SYSTEM INFORMATION MESSAGES ^(a)

CODE xxxx

FRM xxxx

Line Code: AMI or B8ZS

The DS1 line code setting: Alternate Mark Inversion (AMI) or Bipolar

with 8-Zero Substitution (B8ZS).

Frame: SF, ESF, or UNFR

Defines the type of frame pattern being received from the DSX-1:

SuperFrame (SF), Extended SuperFrame (ESF), or Unframed

(UNFR).

LATT xx

LIST xx

Loop Attenuation

The current loop attenuation threshold setting measured in decibels.

The list number of the H2TU-C.

H2TU-C List Number

Margin

MARG xx

VER x.xx

The current margin threshold setting measured in decibels.

The software version number (x.xx).

H2TU-C Software Version Number

(a) System information messages are displayed in Scroll Mode. To scroll through the messages, press the MODE pushbutton for

3 or more seconds.

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Installation

LTPH-UM-1049-02, Issue 2

INSTALLATION

Upon receipt of the equipment, inspect the contents for signs of damage. If the equipment has

been damaged in transit, immediately report the extent of damage to the transportation

company and to ADC.

H2TU-C-319

CO shelf

Figure 2. Installing the H2TU-C-319 List 4E into a Shelf

When installing an H2TU-C in a chassis, be sure to wear an antistatic wrist strap. Avoid touching

components on the circuit board.

To comply with the intrabuilding wiring requirements of GR-1089 CORE, Section 4.5.9, the

shields of the ABAM-type cables that connect the H2TU-C DSX-1 output ports to the

cross-connect panel must be grounded at both ends.

Align the H2TU-C with the enclosure slot guides, then push the unit in until it touches the backplane

card-edge connector.

Place your thumbs on the H2TU-C front panel and push the H2TU-C firmly into the slot guides until the unit

clicks into the backplane and is properly seated.

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LTPH-UM-1049-02, Issue 2

Installation

VERIFICATION

Once the H2TU-C is installed, verify that it is operating properly. To do this, monitor the following:

•

Status LED

Status messages reported by the front-panel display (Table 2 on page 5 lists the status messages).

Verification without an H2TU-R Remote Unit

If there is no H2TU-R remote unit installed:

Verify that the H2TU-C powers up. The front-panel display illuminates and reports status messages. (See

Table 2 on page 5 lists the messages.)

Verify that the H2TU-C attempts to communicate with a remote unit (status LED flashes red). Even if a

remote unit is not present, the following events should occur:

The front-panel display reports various four-character status messages.

The H2TU-C again attempts communication with a remote unit until a remote unit is detected.

Verification with an H2TU-R Remote Unit

If an H2TU-R remote unit has been installed:

Verify that the H2TU-C powers up. (The front-panel display illuminates and reports various status messages.)

Verify that the H2TU-C attempts to communicate with the remote unit (status LED flashes red). One of the

following occurs:

•

If the remote unit is successfully identified and the HDSL2 loop synchronizes, the H2TU-C status LED

lights a steady green. The H2TU-C reports normal margin messages on the front-panel display.

•

If the remote unit is not identified, the H2TU-C reports four-character status messages. The H2TU-C

attempts communication again and reports four-character status messages. The H2TU-C repeats this

cycle until a remote unit is detected.

Verify that a valid DS1 signal has been applied to the H2TU-C and the H2TU-R.

•

If no DS1 signal is being applied to either the H2TU-C or the H2TU-R inputs, then the appropriate DS1

alarms (LLOS or RLOS) display on the front panel and the status LED flashes red.

•

If a valid DS1 signal is being supplied to the H2TU-C and H2TU-R, then DS1 alarm indications should

be absent and the status LED should be a steady green.

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Provisioning

LTPH-UM-1049-02, Issue 2

PROVISIONING

There are two provisioning methods:

•

Use the MODE and LBK pushbuttons on the front panel of the H2TU-C to:

–

Set system options

Reset the H2TU-C to its factory default settings for system options

Display system option settings (scroll mode)

Select system loopbacks

Select MTA test mode

•

Use a maintenance terminal, such as an ASCII terminal or a PC running terminal emulation software,

connected to the H2TU-C craft port or an HMU craft port to access the maintenance screens. Figure 3 on

page 13 shows the maintenance screen. This provides full access to all H2TU-C status, history, inventory, and

provisioning screens.

No dip switches or jumpers are required to provision the H2TU-C as it contains a non-volatile

RAM (NVRAM) which stores the system option settings. System option settings are retained if

shelf power is lost or if the H2TU-C is unplugged.

USING THE MODE AND LBK PUSHBUTTONS

Setting Options through MODE and LBK

To provision the H2TU-C through the MODE and LBK pushbuttons on the front panel:

Press the MODE pushbutton for 1 second and then release it. The front panel display alternately shows the

first system parameter and its current setting.

Press the LBK pushbutton to step through all possible settings of the selected parameter.

After the desired setting has been selected, press the MODE pushbutton. This updates the current displayed

parameter to the selected setting, then advances to the next configurable parameter. After the last parameter

has been selected, a CONF NOmessage appears on the front-panel display.

Do one of the following:

•

To cancel the session without saving the requested parameter changes, press the MODE pushbutton or

do nothing. After 30 seconds, the display returns to its normal mode without saving the new changes.

•

To accept the requested parameter changes, press the LBK pushbutton. A CONFYESmessage displays,

and the display returns to its normal mode after saving the new changes.

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LTPH-UM-1049-02, Issue 2

Provisioning

Resetting to Factory Default Values

All user options for the H2TU-C, described in Table 5 on page 18, can be set to the factory default values using

the MODE and LBK pushbuttons. To set the user options to their default values:

Press the LBK pushbutton for 6 seconds until the following message appears:

DFLT NO

Press the LBK pushbutton until the DFLT NOmessage is displayed.

The message changes to DFLT YESindicating the factory default values are now in effect and the display

returns to the normal mode.

To terminate the DFLT mode without setting the factory default values, do one of the following:

•

Press the MODE pushbutton to return to the normal display mode.

Wait 30 seconds for the unit to return to the normal display mode.

Displaying System Parameter Settings

To scroll through the current settings of all system parameters, press the MODE pushbutton for 3 or more seconds.

The H2TU-C displays the following parameters:

•

H2TU-C software version number

H2TU-C list number

Type of frame pattern received from the DSX-1

Line code of the signal received from the DSX-1

All user-configured parameter settings

Loop attenuation threshold setting

Margin alarm threshold setting

Disabling an Alarm

System alarms can be disabled by pressing the LBK pushbutton on the H2TU-C front panel. This executes an

ACO and returns the H2TU-C to its non-alarm state. For more information, see “Retiring System Alarms ” on

page 53.

Loopback Modes

See “Loopback Operation ” on page 55 for instructions on using the MODE and LBK pushbuttons to activate

loopbacks.

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Provisioning

LTPH-UM-1049-02, Issue 2

USING A MAINTENANCE TERMINAL

Connecting to a Maintenance Terminal

The craft port on the front panel allows you to connect the H2TU-C to a maintenance terminal (ASCII terminal

or PC running a terminal emulation program). Once connected to a maintenance terminal, you can access the

maintenance, provisioning, and performance screens.

To connect to a maintenance terminal:

Connect a standard 9-pin terminal cable to the RS-232 craft port, as shown in Figure 1 on page 3, on the

front panel.

Connect the other end of the cable to the serial port on the maintenance terminal.

Start a terminal emulation program such as Procomm that emulates a VT100 terminal.

Configure the maintenance terminal to the following communication settings:

•

9600 baud

No parity

8 data bits

1 stop bit

Hardware flow control to OFF

If necessary, press CTRL + R to refresh the HiGain HDSL2 logon screen.

The Logon Screen

The HiGain HDSL2 maintenance terminal screens allow you to monitor, provision, and troubleshoot an H2TU-C

system.

To select a menu from the HiGain HDSL2 logon screen, shown in Figure 3 on page 13, do one of the following:

•

Press the underlined letter of the menu.

←

→

Use the

arrow keys to select the menu and press ENTER .

Table 3 summarizes the navigational keys. They are also listed in the onscreen Help menu. Table 4 on page 13

describes the Logon screen menus.

Table 3. Navigational Keys for the HiGain HDSL2 Maintenance Terminal Screens

Key ^(a)

Function

SPACEBAR

ENTER

ESC

Cycle through selections.

Activate the current setting or choice, or display a menu.

Return to the parent menu.

or CTRL + E

or CTRL + X

or CTRL + D

or CTRL + S

Select the submenu or item above the current one, or return to the previous menu.

Select the submenu or item below the current one.

Select the menu or item to the right of the current one.

Select the menu or item to the left of the current one, or return to the previous menu.

Refresh the screen.

↑

↓

→

←

CTRL + R

(a) Legacy management units require the use of control keys instead of arrow keys.

January 9, 2002

H2TU-C-319 List 4E

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LTPH-UM-1049-02, Issue 2

Provisioning

Most VT100 emulation programs support a print screen option. For Windows-based programs,

such as Procomm or HyperTerminal, see the Help menu for instructions.

Menu bar

Monitor Performance Event Log Config Inventory Report Rlogon

Help

+------------------------------------------+

ADC DSL Systems, Inc.

HiGain HDSL2

Voice: 800.638.0031

Fax : 714.832.9924

+------------------------------------------+

ID: xxxx--xxxx--xxxx--xxxx

08/01/2001 06:38:12

H2TU-C

System: OK

Circuit ID

Date and Time

Logon Device

System Status

Figure 3. Logon Screen

Table 4. Logon Screen Menus

Press this key:

To access this menu:

Menu Functions

Monitor

Monitors loopbacks and alarms, and provides a graphical representation of

circuit activity, including ES, UAS, SES, and line code.

Performance

Event Log

Config

Provides performance and alarm histories for current, 24-hour, 48-hour, or

31-day periods for either the DS1 or HDSL2 interface.

Identifies the 100 most recent system events and reports the date and time of

occurrence.

Provides standard configuration options, ADC options, date and time setting,

and a reset option (factory settings). Also provides a master clear option that

clears all performance, alarm, and event log entries.

Inventory

Provides product information about the various devices that are in the system

and lists circuit and device identifications.

Report

Provides four types of reports: Full Report, Short Report, System Information

Report, and Event Report.

Rlogon/Rlogout

Remote logon can be performed from the H2TU-C or H2TU-R. The screen

displays “Rlogout” when the H2TU-C or H2TU-R is remotely logged on to the

other unit at the end of the circuit.

To logoff the remote unit, press R . “Rlogout” changes to “Rlogon”. The unit is

now locally logged on until R is pressed again to reinitiate the remote logon.

Help

Provides a glossary of terms used in the maintenance screens, a list of

navigational keys, and ADC contact information.

H2TU-C-319 List 4E

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Provisioning

LTPH-UM-1049-02, Issue 2

PROVISIONING TASKS

After the H2TU-C is successfully installed, perform these basic provisioning tasks:

•

Set date and time (see “Setting Date and Time ” on this page).

Set circuit ID numbers (see “Setting Circuit ID Numbers ” on page 15).

Make any configuration changes (see “Configuring the System ” on page 16).

Clear history, alarm, and event log screens to remove miscellaneous data during startup (see “Clearing the

History, Alarm, and Event Log Screens ” on page 33).

Setting Date and Time

Monitor Performance Event Log Config Inventory Report Rlogon

+-----------------------+

Help

| Standard Options

| ADC Options

| Test Mode

-> |

| Date and Time

+---------------------------------+

| Date (mm/dd/yyyy) : 08/01/2001 |

| Time (hh:mm[:ss]) : 06:40:11

+---------------------------------+

ID: xxxx--xxxx--xxxx--xxxx

08/01/2001 06:38:12

H2TU-C

System: OK

Figure 4. Config Menu - Date and Time

Press C to select the Config menu.

Use the and arrow keys to select Date and Time, then press ENTER .

↑

↓

Type the date in the format indicated, then press ENTER .

Type the time in the format indicated (entering seconds is optional), then press ENTER .

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LTPH-UM-1049-02, Issue 2

Provisioning

Setting Circuit ID Numbers

The Inventory menu provides product information on all units in the system and allows setting of the circuit and

unit identification numbers.

Monitor Performance Event Log Config Inventory Report Rlogon

Help

-------------------------- Product Information ----------------------------

Unit

Product : H2TU-C-319

List : 4E

: H2TU-C

H2TU-R

H2TU-R-402

Sw Ver. : 3.00

3.00

Build # : 10

Checksum : 0x604A

H2 Xcvr : L1-HB2 1.31

Serial # : 01232456789

0x9616

L1-RA2 1.31

0123456789

XXXXXXXXXX

6-1-2001

CLEI

: VACHYVYGAA

Mfg. Date: 6-1-2001

-------------------- Circuit and Unit Identifications ---------------------

Circuit ID

H2TU-R ID

: xxxx--xxxx--xxxx--xxxx

Circuit Notes:

ID: xxxx--xxxx--xxxx--xxxx

08/01/2001 06:42:07

H2TU-C

System: OK

Figure 5. Inventory Screen

Press I to select the Inventory menu.

Type the Circuit ID number, then press ENTER .

Type the ID numbers of all other devices listed in the system, pressing ENTER after each entry.

H2TU-C-319 List 4E

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LTPH-UM-1049-02, Issue 2

Configuring the System

The Config menu (see Figure 6 below) allows you to make the following changes:

•

Standard options (see “Making Changes to Standard and ADC Options ” on page 16).

ADC options (see “Making Changes to Standard and ADC Options ” on page 16).

Date and time (see “Setting Date and Time ” on page 14).

Master clear (see “Clearing the History, Alarm, and Event Log Screens ” on page 33).

Reset to factory default configuration (see “Resetting to Factory Defaults ” on page 32).

Monitor Performance Event Log Config Inventory Report Rlogon

Help

+-----------------------+

| Standard Options

| ADC Options

| Test Mode

| Date and Time

| Master Clear

-> |

| Set Factory Defaults |

+-----------------------+

ID: xxxx--xxxx--xxxx--xxxx

08/01/2001 06:38:12

H2TU-C

System: OK

Figure 6. Config Menu

Making Changes to Standard and ADC Options

Figure 7 and Figure 8 on page 17 show the Standard and ADC configuration options. Standard options are those

supported by HiGain HDSL2 units when connected to units from other vendors. ADC options are an extended set

of options that are only available when using HiGain units exclusively. For a description of each option and a list

of possible option settings, refer to Table 5 on page 18 and Table 6 on page 19. To make changes to these options:

Press C to select the Config menu.

Use the and arrow keys to select Standard Options or ADC Options, then press ENTER .

↑

↓

Use the arrow keys to select an option.

Press the SPACEBAR to cycle through the available settings for that option.

Press ENTER to activate your choice.

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Provisioning

Monitor Performance Event Log Config Inventory Report Rlogon

+-----------------------+

| Standard Options -> |

+-----------------------------------------------------+

Help

| Loopback Timeout (LBTO)

| Loop Attenuation Threshold (LATT) [0-40]: 32 dB

: 120 min

| Margin Threshold (MARG)

| DS1 Frame Formatting (FRMG)

| DS1 Line coding (DS1)

| H2TU-C Equalization (EQL)

| H2TU-R Line Buildout (RLBO)

| Alarm Pattern (ALMP)

| H2TU-R TLOS Loopback (TLOS)

| Power Back Off Network (PBON)

| Power Back Off Customer (PBOC)

[0-15]: 5 dB

: AUTO

: B8ZS

: 0

: -7.5 dB |

: AIS

: DIS

: DEF

+-----------------------------------------------------+

Use <Spacebar> to cycle through option settings and <Enter> to activate

ID: xxxx--xxxx--xxxx--xxxx

08/01/2001 06:43:31

H2TU-C

System: OK

Figure 7. Config Menu - Standard Options (defaults shown)

Monitor Performance Event Log Config Inventory Report Rlogon

Help

+-----------------------+

| Standard Options

| ADC Options

-> |

+-------------------------------------------------+

| Line Power Feed (PWRF)

: ON

| Remote Provisioning (RTPV)

| Bipolar Violation Transparency (BPVT)

| DS1 BER (DBER)

: ENA

: DIS

| HDSL2 BER Threshold (HBER)

| Special Loopback Mode (SPLB)

| Smartjack Loopback (LPBK)

| Minor Alarm (ALM)

| Network AIS Pattern (NAIS)

| Performance Report Messaging (PRM)

| SF-RAI to SF-RAI-CI toward NET (RACI)

| ESF-RAI to SF-RAI Overwrite (ROVR)

| H2TU-R DS1 Frame Conversion (CONV)

| Fractional T1 Mode (FT1)

: 1E-6 |

: GNLB |

: ENA

: DIS

: CI

: S+N

: ENA

: ACON |

: DIS

: MUX

| Active DS1 Port (ADS1)

+-------------------------------------------------+

Use <Spacebar> to cycle through option settings and <Enter> to activate

ID: xxxx--xxxx--xxxx--xxxx

08/01/2001 06:43:31

H2TU-C

System: OK

Figure 8. Config Menu - ADC Options (defaults shown)

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Provisioning

LTPH-UM-1049-02, Issue 2

Table 5 describes the Standard Config screen options and lists their front-panel display codes. Table 6 on page 19

describes the ADC Config screen options and lists their front-panel display codes. Selections in bold typeface are

the factory default settings.

Table 5. H2TU-C-319 List 4E Standard Config Menu Options

Front-Panel

Display

Code

Standard Config

Menu Options

Selection

Description

Loopback Timeout

LBTO

NONE

Disables automatic time-out cancellation of all loopbacks.

Sets automatic cancellation of all loopbacks to 20 minutes after initiation.

Sets automatic cancellation of all loopbacks to 60 minutes after initiation.

Sets automatic cancellation of all loopbacks to 120 minutes after initiation.

120

Loop Attenuation

Threshold

LATT

0 through

40 dB

Determines the maximum loop attenuation before an alarm is declared. Zero

disables the alarm. The loop attenuation threshold can only be set through the

maintenance screens.

32 dB

Default value. Zero disables the alarm.

Margin Threshold

MARG

0 to 15 dB

Determines the minimum allowable margin below which a system alarm can

occur. Zero disables the alarm.

The Margin Alarm Threshold can only be set through the maintenance

screens.

5 dB

Default value.

DS1 Frame

Formatting

FRMG

AUTO

Configures the line unit to operate in an auto-framing (AUTO) mode.

It detects and locks to both SF or ESF DS1 frame patterns. Line and path

performance parameters are maintained and displayed. Unframed payloads

will cause the ES-P and SES-P counters to increment.

UNFR

Configures the same as AUTO except unframed payloads do not cause the

ES-P and SES-P counters to increment.

DS1 Line Coding

DS1

B8ZS

AMI

Places both the H2TU-C and H2TU-R into their B8ZS modes.

Places both the H2TU-C and H2TU-R into their AMI modes.

Sets the Equalizer to DSX-1 for 0 to 132 feet.

H2TU-C Equalization EQL

0 ft

See “H2TU-C

133 ft

266 ft

399 ft

533 ft

0 dB

Sets the Equalizer to DSX-1 for 133 to 265 feet.

Sets the Equalizer to DSX-1 for 266 to 398 feet.

Sets the Equalizer to DSX-1 for 399 to 532 feet.

Sets the Equalizer to DSX-1 for 533 to 655 feet.

Sets the DS1 RLBO level toward the Customer Interface (CI).

Sets the DS1 RLBO level toward the CI to -7.5 dB.

Sets the DS1 RLBO level toward the CI to -15 dB.

Equalization (EQL)

Option.” on page 22.

H2TU-R Line

Buildout

RLBO

-7.5 dB

-15 dB

AIS

Alarm Pattern

ALMP

Enables the HiGain HDSL2 system to output an AIS payload at its DS1 ports

for LOSW and LOS DS1. For priority resolution, see Figure 30 on page 54 for

LOS/AIS response priorities.

See “Alarm Pattern

(ALMP) Option.” on

page 22.

LOS

ENA

Enables the HiGain HDSL2 system to output an LOS condition at its DS1 ports

for LOSW and LOS DS1.

H2TU-R TLOS

Loopback

TLOS

PBON

Enables a logic loopback at the H2TU-R when an LOS occurs at its DS1 input,

if enabled at the H2TU-R. For priority resolution, see Figure 30 on page 54.

DIS

Disables TLOS logic loopback.

Power Back Off

Network

DEF

Configures the power output levels of the H2TU-C network unit towards the

customer to comply with the Default template as defined in Section 6.1.4.2 of

ANSIT1.E1.4.

ENH

Configures the power output levels of the H2TU-C network unit towards the

customer to comply with the Enhanced template as defined in Section 6.1.4.2

of ANSIT1.E1.4.

Continued

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H2TU-C-319 List 4E

LTPH-UM-1049-02, Issue 2

Provisioning

Table 5. H2TU-C-319 List 4E Standard Config Menu Options (Continued)

Front-Panel

Display

Code

Standard Config

Menu Options

Selection

DEF

Description

Power Back Off

Customer

PBOC

Configures the power output levels of the H2TU-R network unit towards the

network to comply with the Default template as defined in Section 6.1.4.2 of

ANSIT1.E1.4.

ENH

Configures the power output levels of the H2TU-R network unit towards the

network to comply with the Enhanced template as defined in Section 6.1.4.2

of ANSIT1.E1.4.

Table 6. H2TU-C-319 List 4E ADC Config Menu Options

Front-Panel

Display

Code

ADC Config Menu

Options

Selection

Description

Line Power Feed

PWRF

OFF

Disables powering to the HDSL2 pair.

Keeps the HDSL2 line voltage at nominal -185 Vdc.

Enables remote provisioning.

Remote Provisioning RTPV

ENA

DIS

ENA

Disables remote provisioning.

Bipolar Violation

Transparency

See “Bipolar

Violation

Transparency

(BPVT) Option” on

page 22.

BPVT

Enables BPVs and HDSL2 CRC errors at the DS1 input to be converted into

DS1 BPVs at the DS1 output at the distant end. This makes HiGain HDSL2

transparent to BPVs.

DIS

Disables BPV Transparency.

DS1 BER Threshold DBER

ENA

Enables the fixed 24-hour DS1 BER threshold.

See “DS1 BER

(DBER) Option ” on

page 22.

DIS

Prevents the generation of a system alarm due to DS1 BER.

HDSL2 BER

Threshold

HBER

1E-6

1E-7

NONE

System alarm relay contact closes and the Status LED flashes red when the

Block Error Rate (BER) exceeds 10^-6.

See “HDSL2 BER

page 70.

System alarm relay contact closes and the Status LED flashes red when BER

exceeds 10^-7.

Prevents generation of a system alarm due to BER.

Special Loopback

Mode

SPLB

GNLB

A2LB

A3LB

A4LB

ENA

Configures the HiGain HDSL2 system to respond to the generic in-band

loopback codes.

Configures the HiGain HDSL2 system to respond to the in-band loopback

codes of the Teltrend addressable repeater.

Configures the HiGain HDSL2 system to respond to the in-band loopback

codes of the Wescom addressable repeater.

Configures the HiGain HDSL2 system to respond to the in-band loopback

codes of the Wescom Mod 1 addressable repeater.

SmartJack Loopback LPBK

Enables the HiGain HDSL2 system to recognize all in-band SmartJack

loopback commands.

DIS

Configures the HiGain HDSL2 system to ignore all in-band SmartJack

loopback commands.

Continued

H2TU-C-319 List 4E

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LTPH-UM-1049-02, Issue 2

Table 6. H2TU-C-319 List 4E ADC Config Menu Options (Continued)

Front-Panel

Display

Code

ADC Config Menu

Options

Selection

Description

Minor Alarm

ALM

ENA

DIS

Enables the generation of the output alarm on pin H when a system alarm

condition occurs.

Disables the generation of the output alarm on pin H when a system alarm

condition occurs.

Network AIS Signal NAIS

If ALMP is set to AIS, this option specifies which pattern is sent to the network

when a remote LOS or AIS occurs. When configured for CI, an AIS-CI pattern

is sent to the network.

AIS

When configured for AIS, an AIS pattern is sent to the network.

Performance Report PRM

Messaging

SPRM

The H2TU-R generates Supplemental PRM (SPRM) every second if no PRM

is received from the CPE within 5 seconds of a reset or if an LOS/AIS/LOF

condition occurs. TL1 commands and responses are enabled.

NPRM

The H2TU-R generates Network PRM (NPRM) if no PRM is present from the

CPE. If the CPE is sending PRMs, NPRM is generated every second in addition

to the existing PRM. TL1 commands and response are enabled.

S + N

The H2TU-R generates an NPRM which is tagged onto an SPRM every

second. The H2TU-R generates SPRM if no PRM is present from the CPE. If

the CPE is sending PRM, the PRM is converted to an SPRM. TL1 commands

and responses are enabled.

OFF

ESF Datalink (DL) is completely transparent. No PRMs are generated. There

are no TL1 responses unless the system is first armed by a TL1 command,

which enables performance monitoring.

SF RAI to SF RAI-CI RACI

Toward Network

ENA

Allows a DS1 SF-RAI (yellow alarm) signal received by the H2TU-R to be

converted to an SF-RAI-CI signal toward the network.

DIS

Prevents conversion of the DS1 SF-RAI to SF RAI-CI. It does not prevent SF

RAI-CI to ESF RAI-CI from occurring when FCON is active.

ESF RAI to SF RAI

Overwrite

ROVR

ENA

If the CONV option is set to FCON or ACON, an ESF DS1 payload from the

network with an embedded RAI pattern is converted to an SF-RAI pattern

toward the CI at the H2TU-R.

See “ESF RAI to SF

RAI Overwrite

(ROVR) Option ” on

page 23.

DIS

Prevents conversion to an SF-RAI pattern.

H2TU-R DS1 Frame CONV

Conversion

ACON

Auto (ACON) detection of framing and potential frame conversion at the

remote.

See “H2TU-R DS1

Frame Conversion

(CONV) Option ” on

page 23.

OFF

Framing determined by the DS1 frame formatting option.

FCON

ENA

Auto detection of framing and forced frame format conversion (FCON) at the

H2TU-R.

Fractional T1 Mode

FT1

Enables system response to DDS latching loopback commands for fractional

T1 applications and enables CPE disconnect or trouble indication. See

Figure 30 on page 54 for LOS/AIS response priorities.

See “Fractional T1

(FT1) Option ” on

page 26.

DIS

Disables system response to DDS latching loopback commands for fractional

T1 applications and CPE disconnect or trouble indications.

Continued

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H2TU-C-319 List 4E

LTPH-UM-1049-02, Issue 2

Provisioning

Table 6. H2TU-C-319 List 4E ADC Config Menu Options (Continued)

Front-Panel

ADC Config Menu

Display

Selection

MUX

Description

Options

Code

Active DS1 Port

ADS1

The MUX mode selects the DSX-1 (MUX) port as the active source for the DS1

Signal to transmit to the HSDL Line Port #1.

An AIS signal is sent to the auxiliary Port #2. Equalizer settings apply to the

MUX DSX-1 port. The AUX equalizer is set to 0.

See “Dual DSX-1

Port Option ” on

page 31.

AUX

The AUX mode selects the auxiliary DSX-1 Port #2 as the active source for

DS1 signal to transmit to the HDSL Line Port.

In this case, the MUX port is used as a monitor or splitting device for electrical

test access. Equalizer settings apply to the AUX DSX-1 port. The MUX

equalizer is set to 0.

CTHR

Activates the Cut-through mode. This mode electrically connects the MUX

port to the AUX port and the H2TU-C operates as a cut-through card.

This is used when one tributary from the Wideband 3190 MUX card is required

to appear at the DSX-1 interface to the local central office. Equalizer settings

apply to the MUX DSX-1 port. The AUX Equalizer is set to 0.

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LTPH-UM-1049-02, Issue 2

HDSL2 BER Threshold (HBER) Option. The HBER option permits the monitoring of loop integrity and

reporting of alarms when excessive errors are detected. The PM primitive used for this purpose is the CRC

checksum performed on the HDSL2 frame for both directions of transmission. It is, therefore, called a block error

rate rather than the bit error rate associated with the DS1 interface. The CRC errors and counts are displayed on

the Monitor screen for both the H2TU-C and H2TU-R. The HBER option allows an alarm to be generated if the

total number of CRCs at either the H2TU-C or H2TU-R exceeds the selected BER threshold during the last

1-minute interval.

•

HBER option = 1E-6. Alarm is generated if CRC > 93

HBER option = 1E-7. Alarm is generated if CRC > 9

Once initiated, the HBER count clears when the CRC count drops below the selected threshold. Selecting NONE

inhibits this alarm.

H2TU-C Equalization (EQL) Option. Equalization is the configuration of system transmission characteristics

within specified limits. An adaptive equalizer inserts a frequency-shaped loss that corresponds to an equivalent

addition of an appropriate cable length. By simulating the additional cable loss necessary for correct operation,

the equalizer compensates for a range of variation in transmission path characteristics.

Alarm Pattern (ALMP) Option. To improve HiGain HDSL2 compatibility with the switch-to-protect features

used in Digital Loop Carrier (DLC) feeder applications, the H2TU-C has an Alarm Pattern (ALMP) option that

allows you to select either an AIS or LOS DS1 output payload for the following alarms:

•

LOSW on any loop

LOS DS1

Bipolar Violation Transparency (BPVT) Option. The H2TU-C improves compatibility with Digital Loop

Carrier (DLC) feeder applications because of its ability to transmit DS1 BPV occurrences between its DS1

interfaces. This feature is required to support protection switching in DLC applications. Each DLC terminal must

be able to monitor the integrity of its Receive DS1 payload and then switch to the protect line when the integrity

of the path drops below specific user selected limits. An essential requirement of this feature is the need for each

DLC terminal to detect BPVs in its DS1 input. Standard HDSL systems correct DS1 BPVs at the input and

therefore prevent them from being detected by the DLC terminals to which they are connected. The H2TU-C and

its associated remote units remove this limitation and become BPV transparent by detecting and counting input

BPVs at each end and then by replicating them at the DS1 output port of the distant end.

The BPV count is converted into BPVs at the distant end during the following second at a rate of 1 BPV every

128 DS1 bits up to a maximum of 12000 (BER = 7.7 x 10^-3). This maximum rate is more than adequate since it

exceeds the maximum 10^-3BER required by most DLC systems.

DS1 BER (DBER) Option. The DS1 BER alarm occurs when any of the DS1 or DSX-1 performance

monitoring parameters listed in Table 7 exceed the counts shown for the 24-hour period between 12:00:00 AM

through 11:59:59 PM. These thresholds correspond to a 10^-6BER. All PM counters clear to zero at 12:00:00 AM

or when Master Clear is selected. See “Clearing the History, Alarm, and Event Log Screens ” on page 33.

Table 7. DS1 and DSX-1 24-hour PM Threshold

Parameter

Threshold Count

CV-L (BPV)

133,400

648

ES-L, ES-P, PRM, PDVS-L

SES-L, SES-P

100

UAS-P, UAS-L

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LTPH-UM-1049-02, Issue 2

Provisioning

SF RAI to SF RAI-CI Toward Network (RACI) Option. In general, the Remote Alarm Indication -

Customer Installation (RAI-CI) signal is a RAI signal which contains a signature indicating that an LOF or AIS

failure has occurred within the customer’s network.

RAI-CI is transmitted toward the network when these two conditions are simultaneously true at the point from

which RAI-CI is originated (at the H2TU-R, toward the network):

•

RAI is received from the CI

No LOF, LOS, or AIS failure is detected in the signal received from the network.

Since RAI-CI meets the definition of RAI, it may be detected and used exactly as an RAI.

For ESF, the RAI-CI signal is a repetitive pattern with a period of 1.08 seconds. RAI-CI is formed by sequentially

interleaving 0.99 seconds of the unscheduled message 00000000 11111111 (right-to-left), which represents RAI

in the DL, with 90 milliseconds of the message 00111110 11111111 (right-to-left) to flag the signal as RAI-CI.

For SF, the SF-RAI-CI signal is transmitted in-band by setting each of the 24 channel time slots to 1000 1011

(left-to-right). In addition to the criteria specified above, the generation of SF-RAI-CI has to be held for 1 second

to examine the DS0 channels for the presence of a frame with an all-zeroes pattern. If present, the generation of

SF-RAI-CI is suspended for the duration of the all-zeroes pattern.

In all SF environments, the H2TU-R automatically converts a CPE DS1 payload with an embedded RAI signal

into an RAI-CI pattern toward the network if the RACI option is enabled (default). Such a conversion affects the

payload as described above. Disable RACI to avoid this payload-affecting conversion.

The SF RAI to SF RAI-CI option is only applicable in an all SF framing environment. If SF to ESF

conversion is active (the CONV option is set to either ACON or FCON), the SF RAI is converted

into ESF RAI in the FDL, regardless of the RACI setting.

ESF RAI to SF RAI Overwrite (ROVR) Option. If the ESF RAI to SF RAI Overwrite (ROVR) option is

enabled, it allows a network ESF RAI or ESF RAI-CI pattern to be converted into a CPE SF RAI or SF RAI-CI

pattern, and overwrites the payload bits with the specific alarm patterns.

If the ROVR option is disabled, it prevents conversion of a network ESF payload with an embedded RAI pattern

and preserves the integrity of the CPE payload as it was originally transmitted.

Power Back Off (PBOC and PBON) Option. Power Back Of Network (PBON) and Power Back Off

Customer (PBOC) allow the HDSL circuit to support two transmit power templates: default (DEF/higher level)

and enhanced (ENH/lower level). These are defined in Section 6.1.4.2 of the ANSI T1E1.4 HDSL2 standard. Each

HDSL2 receiver detects the level it is receiving during the start-up, pre-activation sequence. It then compares this

level to the level it should be receiving according to the PBON and PBOC option settings (DEF or ENH). If the

received level is outside the template limits, the receiver sends a message to the upstream HDSL2 transmitter

requesting the proper level. These levels are adjusted only during the start-up routine or if the PBON or PBOC

option settings are changed during normal operation. Since the ENH template levels are up to 15 dBm below those

of the DEF template, the ENH setting can be used to reduce crosstalk levels into adjacent circuits. (For example,

if crosstalk noise is being induced by the H2TU-R, set the PBO C option to its lower (ENH) level setting.

Conversely, if the HDSL2 signal at the H2TU-R is being affected by crosstalk noise induced from adjacent pairs,

set the PBOC option to its higher (DEF) level setting.

Changing these Power Back Off option settings on a live circuit causes the HDSL2 loop to

momentarily drop and then reacquire synchronization. This setting can also affect the operating

margins.

H2TU-R DS1 Frame Conversion (CONV) Option. Frame format conversion is only applicable to the

remote H2TU-R, but selectable by the H2TU-C or H2TU-R. This option enables the network to be ESF, which is

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LTPH-UM-1049-02, Issue 2

used to embed SPRM or NPRM into the datalink toward the network. During conversion, frame bit errors are

regenerated to ensure transparency.

The HDSL2 system attempts to find ESF or SF framing or determines that no framing exists. The DS1 framing is

then synchronized with the HDSL2 frame. If the framing is lost, the system generates an Out-of-Frame (OOF)

defect which results in UAS-P. As a result, the system reverts to frame search mode.

This option has the following settings:

•

OFF: No frame conversion takes place. All framing issues are determined by the FRMG option settings of

AUTO and UNFR.

•

ACON: This is the automatic conversion setting. If the system detects ESF from the network and SF from the

CPE, it automatically converts the CPE SF to ESF toward the network as well as the network ESF to SF

toward the CPE.

Upon power-on-reset, after loopdown, or after changing the frame conversion option, the framing needs to

be re-established before a complete conversion takes place. If there is a failure condition (LOS, AIS, or LOF)

during steady state, the previous conversion state is maintained to ensure continuity when the system returns

from the failure condition.

If SF is received from the network, the H2TU-R forces an ESF toward the network for about 1.5 seconds.

This signals to the far-end PM-NIU at the network boundary that frame conversion is requested. If the far-end

PM-NIU is capable of conversion, it changes the framing to ESF. If not, then the H2TU-R reverts to SF and

does not apply any conversion.

If an ESF is received from the CPE, it is passed on to the network, and the network’s inbound framing is

passed on to the CPE.

•

FCON: This is the forced conversion setting. Table 8 below lists the HiGain HDSL2 responses to both the

ACON and FCON settings for the CONV option. The responses are identical, except in cases 3 and 4. In these

cases, the FCON reply is attempting to force the network (or the far-end PM-NIU) to send ESF. It also alerts

the CPE with an AIS alarm pattern while forcing the ESF to the network. Continuity is maintained as for

ACON. Table 9 on page 25 and Table 10 on page 25 list the ESF and SF frame formats, respectively.

Table 8. Response to H2TU-R DS1 Frame Conversion Options

ACON Option

FCON Option

Case Number

NET Transmit

CPE Transmit

NET > CPE

NET < CPE

NET > CPE

NET < CPE

ESF

ESF → SF

ESF ← SF

ESF → SF

ESF ← SF

ESF

ESF → ESF

ESF ← ESF

SF → SF

SF → AIS

ESF ← ESF

SF → SF

SF → AIS

SF ← SF

ESF ← SF

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Table 9. Extended SuperFrame Format

Frame Bits

Framing Pattern

Sequence (FPS) - 2 kps

Frame Bit for Datalink

(FDL) - 4 kbps

Cyclical Redundancy

Check (CRC) Bits - 2 kbps

ESF Number

Table 10. SuperFrame Format

Frame Bits

SF Number

Terminal Framing Bit

SuperFrame Signaling Bit

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Fractional T1 (FT1) Option. Fractional T1 circuits can be used in feeder networks to provide frame relay

service. If such circuits are maintained by a DDS test group, then these circuits must respond to DDS/DS0 latching

loopback commands, the only tool test groups have at their disposal. A latching loopback, once it has been

initiated by the correct sequence, remains locked or “latched” until the correct loopdown sequence has been

detected.

The FT1 option, when enabled, allows the H2TU-C to respond to DS0 latching loopback commands and therefore,

supports fractional T1 frame-relay applications. This is in addition to the standard full bandwidth T1 2-in-5 loopup

and 3-in-5 loopdown SmartJack commands. FT1 supports both the full T1 enable commands and the new DDS

latching loopback commands, which must also be enabled. (For more information about latching loopback

commands, refer to BellCore TA-TSY-000077, Issue 3, April 1986.)

The FT1 option supports both the DDS NI and DDS DS0 Data Port (DP) latching loopback sequences listed in

Table 11.

Table 11. DDS NI and DS0 DP Latching Loopback Sequence

Minimum

Number of Bytes

Enable Sequence

Byte Name

Network Code

Transition in Progress (TIP)

NI Loop Select Code (LSC)

DS0 DP Loop Select Code (LSC)

Loopback Enable Code (LBE)

All Ones

S 01 1 1 01 0

S 10 0 0 00 1

S 00 0 0 10 1

S 10 1 0 11 0

S 11 1 1 11 1

S 10 1 0 11 0

S 10 1 1 01 0

S 01 1 1 01 0

100

LBE

Far End Voice (FEV)

TIP

Disable/Loopdown

The sequences in Table 11 are sent in time slot 1. The S in the Network Code column is a “don’t care” bit. The

loopback is activated after the detection of Sequence 6. Upon completion of the enable sequence, the Test Center

continues to transmit FEV bytes in multiples of 20 until FEV confirmation bytes are returned or until about 2

seconds have elapsed. If the confirmation bytes are not received, a failed attempt is reported. Anticipate the

minimum number of bytes when the loopback code is transmitted by a preprogrammed machine test pattern

generator. This minimum number of bytes will most likely be exceeded when the codes are sent manually. Also,

manual testing may inject random data signals between valid control sequences. The detection algorithm ignores

these occurrences and only responds to valid control codes.

Table 12 lists the relationship between the latching loopback sequences and the specific HiGain HDSL2 loopback

they initiate.

Table 12. HiGain HDSL2 Loopback vs. Latching Sequence

HiGain HDSL2 Loopback

Latching Sequence

NREM

NLOC

1, 2A, 3, 6

1, 2B, 3, 6

The NLOC loopback is called tandem DS0 DP loopback. It is used to select one of many loopback points when

there are several identical data ports in tandem. The NI loopback is assigned to the H2TU-R (NREM) since it is

usually located at the Network Interface (NI). The DS0 DP tandem loopback is assigned to the rest of the HiGain

HDSL2 loopbacks because most DDS test sets support this tandem command set.

The Test Center transmits a group of 40 TIP bytes to loop down the loopback. It continues to transmit TIP bytes

in multiples of 20 until the TIP bytes are not returned or until about 2 seconds have elapsed. If the bytes are absent,

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a successful loopdown is reported; otherwise, a failed loopdown is reported. The loop-down can also be initiated

by depressing the H2TU-R loopback control button or by any of the standard 3-in-5 loop-down commands. The

implemented detection/release loopback algorithm functions properly in the presence of a 10 ^-3bit error rate.

Since the FT1 mode is a combination of both the full T1 and the latching loopback modes, all codes are always

active. Therefore, if a loopback is initiated by a latching sequence, it can be looped down by either a latching or

generic loopback and vice versa. All loopback commands are completely symmetric in the FT1 mode.

If the latching sequence shown in Table 12 on page 26 is interrupted for more than 20 minutes, the detection is

cleared, and the H2TU-C reverts back to its initial state where it searches for the initial sequence 1.

After a successful latching sequence terminates in a latched loopback state, this state remains until the Disable

command is detected, or until the LBTO option of NONE, 20, 60, or 120 minutes has expired, whichever occurs

first.

The unframed AIS pattern that is normally sent toward the network for a CI LOS fault condition must be replaced

by the new patterns listed in Table 13 when the FT1 loopback option is selected.

Table 13. Response of H2TU-C-319 List 4E and H2TU-R to LOS and AIS

H2TU-C Output Pattern

FT1

H2TU-C

Input

H2TU-R

Input

H2TU-R

Output

Front-Panel

Display

Framing Payload

FDL

Case Option

Status Screen

ENA

01111110 N/A

01111110 X^(a)

01111110 N/A

LOS/AIS 01111110 RCV

UNFR RLOS/RAIS

XMT IDLE

ALRM

RLOS/RAIS

ESF

LOS/AIS 01111110 RCV

UNFR RLOS/RAIS

XMT IDLE

ALRM

RLOS/RAIS

LOS/AIS SF

LOS/AIS 01111110 RCV

ALRM

RLOS/RAIS

UNFR

AIS

RLOS/RAIS

XMT IDLE

ENA

LOS/AIS SF

LOS/AIS ESF

X^(a)

SF/PL

RCV LLOS/LAIS ALRM

LLOS/LAIS

ESF/PL

AIS

RCV LLOS/LAIS ALRM

LLOS/LAIS

(a) “Don’t care” bit

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Test Access

The H2TU-C’s PC board’s card-edge connector, shown in Figure 33 on page 68, has three separate segments

labeled S1 (segment 1), S2 (segment 2), and S3 (segment 3). S3 contains the standard 3192 pin connections. The

two extra segments, S1 and S2, have pin connections that support additional features called Dual DSX-1 port

option and Metallic Test Access (MTA), respectively, as shown in Figure 9 below through Figure 12 on page 30.

Test Facilities

HMS-358

Backplane

H2TU-C-319 (UUT)

MTAF

Cable

test

set

TB6

OUT

Golden

H2TU-C

319

DSX-1

DACS

MUX

Test

center

HDSL2

Xceiver

Framer

MUX DSX-1

TB6

Cable

pair

HDSL2

Span

HDSL2

Wire

Golden

H2TU-R

Unit

Line

MTAE

Simulator

Test

Pair

Figure 9. Metallic Test Access Block Diagram

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Metallic Test Access. Figure 9 on page 28 shows the block diagram of the metallic test access features which

are under control of the two relays, K1 and K2. The S2 metallic test access ports (IN or OUT) are bused to terminal

block TB6 located on the HMS-358 backplane, as shown in Figure 10 below. Figure 11 displays the location of

TB6 on the HMS-358 backplane.

HMS-358

HMS-358 Shelf

Defective H2TU-L

Backplane

AUX DSX-1

TB6

DACS

MUX

Test

center

OUT

MTAF

K1-D

Standby H2TU-L

MUX DSX-1

TB6

No connection

Backplane

Jumpers

MTAE

K2-S

Figure 10. MTA Relays

DSX-1

METALLIC

TEST ACCESS

COM

SSC1

EXT A

CRT AUD

OUT

CRT VIS

MAJ AUD

MAJ VIS

MIN AUD

MIN VIS

SYS ID

SSC2

SSC3

SSC4

SSC5

SSC6

TB3

TB6

FAN

BITS TIMING

TIP RING

COM NO

A+

A-

TB5

TB7

B+

B-

TB2

TB4

Figure 11. Metallic Test Access TB6 on HMS-358 Backplane

Both relays are energized or pulled down when the user either activates the MTA option from the front panel (or

the test menu) or upon command from the HMU. K1 opens the HDSL2 cable pair between the H2TU-Cs

transceiver and the incoming span and connects the latter to the Metallic Test Access Facilities (MTAF) OUT

T and R pins on TB6. K2 connects the HDSL2 transceiver to the Metallic Test Access Equipment (MTAE) IN

T and R pins on TB6. Typical MTAF and MTAE test interfaces are shown in Figure 9 on page 28. A cable test

set connected to the out port of TB6 can be used to perform cable tests on the 2 wire HDSL2 cable pairs out to the

remote H2TU-R. Alternately, the OUT port of TB6 can connect to a golden H2TU-C which, in conjunction with

a T1 test set, can be used to perform system tests on the original circuit minus its H2TU-C and thus isolate any

trouble to the equipment or the facilities.

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The MTAF IN port of TB6 can connect to an external test facility circuit consisting of an HDSL2 wire line

simulator or test pair and a golden H2TU-R remote HDSL2 unit. This connection allows the H2TU-C Unit Under

Test (UUT) to be tested from its DSX-1 interface on the simulated test circuit. This allows any problem to be

isolated to either the equipment or the facilities. Since this MTA test event disrupts service, it is always

accompanied by an MTA/LOSW alarm that is displayed on both the front panel and status screen.

Simultaneous access of the MTAF and MTAE backplane buses by more than one H2TU-C would connect two

loops and two transceivers together and must be prevented. Such a conflict is inhibited when the shelf is under

command of the HMU-319 management unit. However, when the H2TU-Cs are under manual control, the conflict

can occur if the MTA command is issued to two line units in the same shelf or in different shelves if the TB3 and

TB6 ports are bussed together to create a single test access to an entire bay. Therefore, the user must be aware of

this potential conflict and take care to avoid it.

Figure 10 on page 29 shows a future enhancement of the H2TU-C that uses separate commands to control the two

test relays K1 and K2. This allows the IN and OUT ports of TB6 to be connected to each other which creates a

circuit that allows a suspected H2TU-C to be replaced by a standby H2TU-C. The MTAF relay K1-D is activated

in the defective H2TU-C unit and the MTAE relay K2-S activated in the standby H2TU-C unit. This allows the

original facility circuit of the defective H2TU-C to be connected, by way of the TB6 jumpers to the standby

H2TU-C unit. The test center can then switch the DSX-1 interface from the defective H2TU-C unit to the standby

unit within a DACS or M13 MUX circuit to complete the test circuit.

H2TU-C-319, L4E

To external

DSX-1

cross-connect

panel

LOS

DET

Port 2

Auxiliary

DSX-1

Out

AIS/QRSS

User option

Micro

ADS1

Option

control

I/O

HMU

Payload

DSX-1

(MUX)

MONF

MONE

Out

MONF = Monitor Facilities

M = MUX or SPTF

A = Auxiliary

C = CTHR (Cut through) or SPTE

MONE = Monitor Equipment

SPTF = Split Facilities

SPTE = Split Equipment

Figure 12. H2TU-C-319 List 4E Block Diagram

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The separate control of K1 and K2 permits another test scenario. Two external HDSL2 spans can be looped

together at TB6 if the two H2TU-C line units that connect to the two spans both enable their MTAF states and

close K1 in each unit. This will loop the two pairs together and allow metallic cable tests to be performed from

any point in the loop where both pairs can be accessed.

Future enhancements to the H2TU-C will also allow the following seven bit in-band commands to control K1 and

K2:

MTAF (Enable K2)

MTAE (Enable K1)

DISABLE K1 or K2

1010011

1011110

1011011

Dual DSX-1 Port Option

Figure 12 on page 30 is the block diagram of the H2TU-C Dual DSX-1 Port option. The Input/Output (I/O) DS1

payload from the HDSL2 span is routed to either of the two Line Interface Units (LIU) Auxiliary (AUX) LIU and

Multiplexer (MUX) LIU as controlled by the following three settings of the Active DSX-1 (ADS1) user options:

•

MUX (M)

In the MUX setting, the I/O DS1 payload from the field is connected to the MUX LIU which connects it to

the MUX IN and OUT DSX-1 signal levels at the S3 card-edge connector interface. This interface connects

to one of the HiGain M13 multiplexers that plugs into the HMS-358 shelf. An AIS out-of-service indicating

pattern is sent toward the Auxiliary LIU for the MUX setting. Additionally, the input port of the AUX LIU

is monitored for a valid DS1 signal and an AUX LOS alarm is displayed, if no signal is present.

•

AUX (A)

The AUX setting of the ADS1 option routes the I/O DS1 payload to the AUX LIU. This LIU converts the

payload to the IN and OUT signal levels at the AUX DSX-1 output pins at S1 of the card-edge connector

which provides access to an external DSX-1 cross-connect panel.

The AUX setting of ADS1 also supports a subset of four more user options if the MUX DSX-1 interface is

connected to a HiGain MUX. These four options, which can only be initiated from the shelf’s HMU-319

management card, are called Monitor Facilities (MONF), Monitor Equipment (MONE), Split Facilities

(SPTF), and Split Equipment (SPTE) and are described as follows:

•

The MONF setting routes the signal received from the facilities at the I/O DS1 payload interface to the

MUX, through the MUX LIU, where it can be examined by the MUX test circuits.

The MONE setting operates like the MONF setting but operates on the signal received from the

equipment.

The SPTF setting forces ADS1 to its MUX setting and presents the full I/O DS1 facilities payload to the

MUX for testing.

The SPTE forces ADS1 to its CTHR setting and presents the full DSX-1 equipment signal from the AUX

port to the MUX for testing. Since both the SPTF and SPTE settings disrupt the original AUX circuit,

both modes create minor alarm conditions identified as either ALPM SPTF or ALRM SPTE

•

Cut-through (CTHR) (C)

The CTHR setting of ADS1 disconnects both LIUs from the I/O DS1 payload and connects the two LIUs in

tandem. This allows a DSX-1 circuit from the normal DSX-1 interface (typically a HiGain MUX) to be

cross-connected to the external DSX-1 cross-connect panel by way of the AUX DSX-1 interface.

The Equalizer Select option settings apply to either the AUX or MUX port as determined by the

setting (AUX or MUX) of the ADS1 option. The equalizer of the unselected port is set to 0. The

equalizer settings apply to the AUX port when the Cut-Through setting is selected.

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LTPH-UM-1049-02, Issue 2

Resetting to Factory Defaults

Resetting the H2TU-C to its original factory settings may cause interruption of service.

To reset the H2TU-C to its original factory defaults:

Press C to select the Config menu.

Use the and arrow keys to select Set Factory Defaults, then press ENTER .

↑

↓

Press Y if you want to reset the H2TU-C, or press N to cancel this action.

Monitor Performance Event Log Config Inventory Report

Rlogon

Help

+-----------------------+

| Standard Options

| ADC Options

| Test Mode

| Date and Time

| Master Clear

-> |

| Set Factory Defaults |

+-----------------------+

SETTING FACTORY DEFAULTS . . . SERVICE *MAY* BE INTERRUPTED! ARE YOU SURE (Y/N)?

ID: xxxx--xxxx--xxxx--xxxx 08/01/2001 06:38:12 H2TU-C System: OK

Figure 13. Config Menu - Reset to Factory Defaults

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Clearing the History, Alarm, and Event Log Screens

Select Master Clear to clear the History, Alarm and Event Log screens after the system has been installed and is

functioning properly. This removes miscellaneous data acquired during the startup session and ensures that you

have meaningful data thereafter.

Monitor Performance Event Log Config Inventory Report Rlogon

Help

+-----------------------+

| Standard Options

| ADC Options

| Test Mode

| Date and Time

| Master Clear

-> |

| Set Factory Defaults |

+-----------------------+

Clear ALL performance, alarm and event log entries. Are you sure (Y/N)?

ID: xxxx--xxxx--xxxx--xxxx

08/01/2001 06:38:12

H2TU-C

System: OK

Figure 14. Config Menu - Master Clear

To clear the Event Log, press E to select the Event Log screen, then press L to clear the screen.

To clear an individual history or alarm screen, do the following:

Press P to select the Performance screen.

Press the SPACEBAR to select an interface (H2TU-C DS1, H2TU-R DS1, H2TU-C HDSL2, or

H2TU-R HDSL2), then press ENTER .

Press the SPACEBAR to select the type of statistics (Current, Alarm History, 25 Hour History,

48 Hour History, or 31 Day History), press ENTER after your selection.

–

Selecting 31 Day History allows you to clear the Current, 25 Hour, 48 Hour, and 31 Day

performance history screens for the selected interface.

–

Selecting Alarm History allows you to clear the alarm history screen for the selected interface. For

information about the DS1 and HDSL2 alarm screens, see Table 17 on page 45.

Press L to clear the screen.

To clear all history, alarm, and event log screens:

Press C to select the Config screen.

Use the and arrow keys to select Master Clear.

↑

↓

Press Y to clear all screens.

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Monitoring System Activity and Performance

LTPH-UM-1049-02, Issue 2

MONITORING SYSTEM ACTIVITY AND

PERFORMANCE

The H2TU-C-319 List 4E provides the following maintenance screens for monitoring system activity and

assessing performance:

•

The Monitor screens provide a graphical representation of circuit activity and allow initiation of loopbacks.

The Performance screens provide current, 24-hour, 48-hour, and 31-day performance histories and a

continuous alarm history.

•

The Event Log provides a description of the 100 most recent events which include their origin, time and date

of occurrence, and message.

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LTPH-UM-1049-02, Issue 2

Monitoring System Activity and Performance

USING THE MONITOR SCREEN TO VIEW SYSTEM ACTIVITY

Press M to view the system diagram.

Figure 15 shows an armed circuit with an active loopback and alarms. Terms used on the system diagram are

defined in the onscreen Help menu glossary. Abnormal situations are highlighted on the diagram. Table 14

on page 36 describes the screen field.

DS1 Errors

Armed mode

Margin Loop attenuation

Alarm type

HDSL2 Errors

Monitor Performance Event Log Config Inventory Rlogon Report

Help

ESF

B8ZS

+---+

|H2C|

+---+

|H2R|

------->|-+ |

| | |

|-AIS

ARM

| | |M =19

M =18 |

| | |LA=25

| | |

LA =25 |

ES =3

| ES =1

SES=3

UAS=0

| | |=MAL

| | |

==========================================|

| SES=1

| UAS=0

| | |ES =41

| | |SES=41

| | |UAS=38

| | |

ES =1

SES=1

UAS=0

| PRM=0

ESF

B8ZS

<-------<-+ |

|LPF|

|<-RLOS -

+---+

----------------------------------LOOPBACKS------------------------------------

Active Loopback: NLOC-HG

Press <Space> to select LB New Loopback: LPDN - Loopback H2TU-C towards Network

and <Enter> to activate

ID: xxxx--xxxx--xxxx--xxxx

(LPDN,NLOC,CREM,NREM,CLOC)

08/01/2001 06:47:30 H2TU-C System: Alarm

Line code and framing

Active loopback

System status

Figure 15. Monitor Screen - Active Loopback with Alarms

To initiate a loopback, press the SPACEBAR to cycle though the loopback choices. Press ENTER to select your

choice.

When prompted with the message: Are you sure (Y/N)?,press Y to initiate the loopback or N to

cancel. For more information about loopbacks and troubleshooting, see “Testing ” on page 52.

To initiate a loopdown of all active loopbacks, press the SPACEBAR to select LPDN, then press ENTER .

When prompted with the message: Are you sure (Y/N)?,press Y to initiate the loopdown or N to

cancel.

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Monitoring System Activity and Performance

LTPH-UM-1049-02, Issue 2

Table 14. Monitor Screen Descriptions

Description

Field

Active Loopback

An active loopback is indicated on the lower third of the Monitor screen. Available loopbacks are

indicated by gray text. See Table 22 on page 56 for a summary of the HiGain HDSL2 generic

loopback codes and activation methods.

Alarm Type

Armed Mode

Code Type

Indicates type of alarm.

Indicates system is in an armed state and ready for an intelligent repeater (IR) loopback command.

Type of DS1 line coding used (B8ZS or AMI).

DS1 ES Count

Errored Seconds—The sum of the Errored Seconds-Line (ES-L) and Errored Seconds-Path (ES-P)

counts detected on the DS1 input over a 24-hour period. Errors included are: DS1 frame errors,

BPV, and ESF CRC errors.

DS1 SES Count

DS1 UAS Count

Severely Errored Seconds—The sum of the DS1 Severely Errored Seconds-Line (SES-L) and

Severely Errored Seconds-Path (SES-P) counts over the last 24 hours.

Unavailable Errored Seconds—The number of seconds during which the DS1 input signal was

absent over a 24-hour period.

Frame Type

Type of DS1 framing used on the input stream (SF, ESF, or UNFR).

HDSL2 ES Count

Errored Seconds—The number of 1-second intervals that contained at least one CRC or LOSW

error. This value is a running total of the last 24 Hours.

HDSL2 SES Count

HDSL2 UAS Count

Severely Errored Seconds—The number of 1-second intervals that contain at least 50 CRC errors

or one or more LOSW defects. (An LOSW defect occurs when at least three consecutive HDSL

frames contain one or more frame bit errors.) This value is a running total of the last 24 hours.

Unavailable Errored Seconds—The number of seconds the HDSL2 loop is unavailable. This occurs

after 10 contiguous HDSL SES and is retired after 10 contiguous non-SES seconds. This value is

a running total of the last 24 hours.

Circuit identification (ID) number.

Loop Attenuation—Indicates the attenuation of the Overlapped Pulse Amplitude Modulation

Transmission with Interlocking Spectra (OPTIS) pulse from the distant end. The value is related to

the 196 kHz loss of the cable pair. The loop attenuation is a more direct indication of the loop

attenuation to the OPTIS signal than is the 196 kHz loss. The normal HiGain HDSL2 LA operation

range is from 0 to 40 dB.

LPF

Line Power Feed—Indicates the HDSL2 line power is on.

Margin—The signal-to-noise ratio at all HDSL2 ports, relative to a 10^-7Bit Error Rate.

MAL

Margin Alarm—Indicates the margin on HDSL2 loop has dropped below the threshold (0 to 15dB)

as set by the operator.

HG (or PL)

HG displays when the loopback was initiated from a HiGain (HG) front panel or by a HiGain

maintenance terminal loopback command. PL displays when the loopback was initiated by a

command embedded in the DS1 data path payload (PL).

PRM

The sum of the Performance Report Messaging-Near End (PRM-NE) and Performance Report

Messaging-Far End (PRM-FE) counts.

System Status

The presence or absence of an alarm condition is indicated on the lower right corner of all screens.

System: OK indicates that there are no alarms present; System: Alarm indicates the presence of

an alarm. Refer to “Using the Performance Screens to View Alarm Data ” on page 44.

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LTPH-UM-1049-02, Issue 2

Monitoring System Activity and Performance

USING THE PERFORMANCE SCREENS TO VIEW PERFORMANCE DATA

The Performance screens display:

•

CRC statistics for the HDSL2 or DS1 interface in 31-day, 48-hour, 25-hour, and current history reports.

Alarm statistics for the DS1 interfaces (Figure 25 on page 44 and Figure 26 on page 45) or DS1 interfaces

(Figure 26 on page 45) on a continuous basis.

To access the performance history screens:

Press P to select the Performance screen.

Press the SPACEBAR to select an interface (H2TU-C DS1, H2TU-R DS1, H2TU-C HDSL2, or H2TU-R

HDSL2), then press ENTER .

Press the SPACEBAR to select the type of statistics (Current, Alarm History, 25 Hour History, 48 Hour

History, or 31 Day History), then press ENTER .

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Monitoring System Activity and Performance

LTPH-UM-1049-02, Issue 2

Performance History at the DS1 Interface

The Performance History for the DS1 interface provides 31-day, 48-hour, 25-hour, and current statistics screens

for the H2TU-C and the H2TU-R (as viewed from the H2TU-C).

Figure 16 below and Figure 17 on page 38 are examples of DS1 performance history screens at the remote unit.

Figure 18 on page 39 is an example of DS1 performance history screens at the line unit. Refer to Table 15 on

page 39 for descriptions of the kinds of errors reported on DS1 interface screens. Asterisks indicate performance

monitoring from the previous day.

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H2TU-R DS1

31 Day History (Page 1 of 3)

------------------------------------------------------------------------------

Date

08/09

08/10

08/11

08/12

08/13

08/14

08/15

08/16

08/17

08/18

08/19

08/20

08/21

CV-L

ES-L SES-L UAS-L PDVS-L

ES-P SES-P UAS-P PRM-NE PRM-FE

Press: (N)ext Page, (P)revious Page, C(l)ear History

-----------------------------------------------------------------------------

Use <Space> to cycle through

choices and <Enter> to view

ID: xxxx--xxxx--xxxx--xxxx

Interface : H2TU-R DS1

Statistics : 31 Day History

08/01/2001 07:05:33

H2TU-C

System: OK

Figure 16. H2TU-R DS1 31-Day Performance History

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H2TU-R DS1

25 Hour History (Page 1 of 9)

------------------------------------------------------------------------------

Time

CV-L

ES-L SES-L UAS-L PDVS-L

ES-P SES-P UAS-P PRM-NE PRM-FE

*22:15

*22:30

*22:45

*23:00

23:15

23:30

23:45

00:00

00:15

00:30

00:45

01:00

Press: (N)ext Page, (P)revious Page, C(l)ear History

-----------------------------------------------------------------------------

Use <Space> to cycle through

choices and <Enter> to view

Interface : H2TU-R DS1

Statistics : 25 Hour History

ID: xxxx--xxxx--xxxx--xxxx 08/01/2001 07:05:33

H2TU-C

System: OK

Figure 17. H2TU-R DS1 25-Hour Performance History

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LTPH-UM-1049-02, Issue 2

Monitoring System Activity and Performance

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H2TU-R DS1

48 Hour History (Page 1 of 4)

------------------------------------------------------------------------------

Time

CV-L

ES-L SES-L UAS-L PDVS-L

ES-P SES-P UAS-P

*00:00

*01:00

*02:00

*03:00

*04:00

*05:00

*06:00

*07:00

*08:00

*09:00

*10:00

*11:00

Press: (N)ext Page, (P)revious Page, C(l)ear History

-----------------------------------------------------------------------------

Use <Space> to cycle through

choices and <Enter> to view

Interface : H2TU-R DS1

Statistics : 48 Hour History

ID: xxxx--xxxx--xxxx--xxxx 08/01/2001 07:05:33

H2TU-C

System: OK

Figure 18. H2TU-C DS1 48-Hour Performance History

Table 15. Error Acronyms Used on the DS1 Performance History Screens

Error Acronym

Description

Error Acronym

Description

CV-L

Code Violation - Line

Total BPV count.

SES-P

Severely Errored Seconds - Path

Seconds with SEF or CRC (ESF) ≥ 320 or

FE ^(d)(SF) ≥ 8 (F_T+ F_S).

ES-L

Errored Seconds - Line

UAS-P

Unavailable Seconds - Path

A second of unavailability based on SES-P

or AIS ≥ 1.

Performance Report Monitoring - Near End

The PRM from CPE indicates errors, and

the signal received from the network at the

remote is error-free.

Seconds with BPV ≥ 1.

SES-L

Severely Errored Seconds - Line

Seconds with BPV plus EXZ ≥ 1544 or

LOS ≥ 1.

PRM-NE ^(a)

UAS-L

Unavailable Seconds - Line

Seconds with LOS ≥ 1.

PRM-FE ^(a)

Performance Report Monitoring - Far End

The PRM from the network indicates

errors, and the signal received from the

CPE is error-free.

PDVS-L

ES-P

Pulse Density Violation Seconds - Line

Seconds with excessive zeroes

B8ZSS ^(b)

MSEC ^(b)

B8ZS Monitored Seconds

Seconds with B8ZS detection when AMI

option is active.

(AMI = 16 zeroes, B8ZS = 8 zeroes).

Errored Seconds - Path

Seconds with SEF ^(c), CRC( ESF), or

FE ^(d)(SF) ≥ 1.

Monitored Seconds of the current

(15 minute/1 hour/1 day) screen.

(a) Only displays on H2TU-R Performance History screens.

(b) Displays on the DS1 Current Statistics screens.

(c) Severely Errored Frame—Two or more frame bit errors occurring in a 0.75 ms interval for SF or a 3 ms interval for ESF.

(d) FE is a frame bit error.

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Monitoring System Activity and Performance

LTPH-UM-1049-02, Issue 2

Performance History at the HDSL2 Interface

The HDSL2 interface has 31-day, 48-hour, 25-hour, and current statistic screens for the H2TU-C. Figure 19 and

Figure 20 below are examples of 31-day and 48-hour performance history screens. Figure 21 on page 41 is an

example of a 25-hour performance history screen. Refer to Table 16 on page 41 for descriptions of the kinds of

errors reported on all HDSL2 performance screens. Asterisks indicate performance monitoring from the previous

day.

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H2TU-C HDSL2 31 Day History (Page 1 of 3)

-----------------------------------------------------------------------------

Date

10/09

10/10

10/11

10/12

10/13

10/14

10/15

10/16

10/17

10/18

10/19

10/20

10/21

SES

UAS LOSWS

Press: (N)ext Page, (P)revious Page, C(l)ear History

-----------------------------------------------------------------------------

Use <Space> to cycle through

choices and <Enter> to view

ID: xxxx--xxxx--xxxx--xxxx

Interface : H2TU-C HDSL2

Statistics : 31 Day History

08/01/2001 07:05:33

H2TU-C

System: OK

Figure 19. H2TU-C HDSL2 31-Day Performance History

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H2TU-C HDSL2 48 Hour History (Page 1 of 4)

------------------------------------------------------------------------------

Time

SES

UAS

LOSWS

*00:00

*01:00

*02:00

*03:00

*04:00

*05:00

*06:00

*07:00

*08:00

*09:00

*10:00

*11:00

Press: (N)ext Page, (P)revious Page, C(l)ear History

-----------------------------------------------------------------------------

Use <Space> to cycle through

choices and <Enter> to view

Interface : H2TU-C HDSL2

Statistics : 48 Hour History

ID: xxxx--xxxx--xxxx--xxxx 08/01/2001 07:05:33

H2TU-C

System: OK

Figure 20. H2TU-C HDSL2 48-Hour Performance History

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LTPH-UM-1049-02, Issue 2

Monitoring System Activity and Performance

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H2TU-C HDSL2 25 Hour History (Page 1 of 9)

------------------------------------------------------------------------------

Time

SES

UAS

LOSWS

*22:15

*22:30

*22:45

*23:00

23:15

23:30

23:45

00:00

00:15

00:30

00:45

01:00

Press: (N)ext Page, (P)revious Page, C(l)ear History

-----------------------------------------------------------------------------

Use <Space> to cycle through

choices and <Enter> to view

Interface : H2TU-C HDSL2

Statistics : 25 Hour History

ID: xxxx--xxxx--xxxx--xxxx 08/01/2001 07:05:33

H2TU-C

System: OK

Figure 21. H2TU-C HDSL2 25-Hour Performance History

Table 16. Error Acronyms Used on the HDSL2 Performance History Screens

Error Acronym

Description

Errored Seconds

Seconds with HDSL2 CRC ≥ 1 or LOSW ≥ 1

SES

Severely Errored Seconds

Seconds with HDSL2 CRC ≥ 50 or LOSW ≥ 1

UAS

Unavailable Seconds

Based on 10 contiguous SES occurrences

Code Violation

Total count of HDSL2 CRC errors.

LOSWS

Loss of Sync Word Second

Seconds with LOSW ≥ 1

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Monitoring System Activity and Performance

LTPH-UM-1049-02, Issue 2

Current Statistics Screens for the DS1 Interface

Examples of current statistics screens are shown below. Figure 22 and Figure 23 show statistics for the DS1

interface at the remote unit and line unit, respectively. These screens report 1-day, 1-hour, and 15-minute statistics.

Refer to Table 15 on page 39 for descriptions of the kinds of errors reported on these screens.

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H2TU-R DS-1 Current Statistics

-----------------------------------------------------------------------------

1 Day

00:00

1 Hour

12:00

15 Min

12:30

Start

CV-L

ES-L

SES-L

UAS-L

PDVS-L

ES-P

SES-P

UAS-P

PRM-NE

PRM-FE

B8ZSS

MSEC

No PRM Detected

3482

1801

Press: C(l)ear Current Statistics

------------------------------------------------------------------------------

Use <Space> to cycle through

choices and <Enter> to view

ID: xxxx--xxxx--xxxx--xxxx

Interface : H2TU-R DS-1

Statistics : Current

08/01/2001 07:05:33

H2TU-C

System: OK

Figure 22. H2TU-R DS1 Current Statistics

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H2TU-C DS-1 Current Statistics

-----------------------------------------------------------------------------

1 Day

00:00

1 Hour

12:00

15 Min

12:30

Start

CV-L

ES-L

SES-L

UAS-L

PDVS-L

ES-P

SES-P

UAS-P

B8ZSS

MSEC

3482

1801

Press: C(l)ear Current Statistics

------------------------------------------------------------------------------

Use <Space> to cycle through

choices and <Enter> to view

ID: xxxx--xxxx--xxxx--xxxx

Interface : H2TU-C DS-1

Statistics : Current

08/01/2001 07:05:33

H2TU-C

System: OK

Figure 23. H2TU-C DS1 Current Statistics

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LTPH-UM-1049-02, Issue 2

Monitoring System Activity and Performance

Current Statistics for HDSL2 Interface

Figure 24 shows statistics for the HDSL2 interface at the H2TU-C. This screen reports 1-day, 1-hour, and

15-minute statistics. Refer to Table 16 on page 41 for descriptions of the kinds of errors reported on this screen.

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H2TU-C HDSL2 Current Statistics

-----------------------------------------------------------------------------

1 Day

00:00

1 Hour

12:00

15 Min

12:30

Start

SES

UAS

LOSWS

3482

1801

Margin(dB)

LA (dB)

Cur

Low

Press: C(l)ear Current Statistics

------------------------------------------------------------------------------

Use <Space> to cycle through

choices and <Enter> to view

ID: xxxx--xxxx--xxxx--xxxx

Interface : H2TU-C HDSL2

Statistics : Current

08/01/2001 07:05:33

H2TU-C

System: OK

Figure 24. H2TU-C HDSL2 Current Statistics

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Monitoring System Activity and Performance

LTPH-UM-1049-02, Issue 2

USING THE PERFORMANCE SCREENS TO VIEW ALARM DATA

To access the alarm history screens:

Press P to select the Performance menu.

Press the SPACEBAR to select an interface (H2TU-C DS1, H2TU-R DS1, H2TU-C HDSL2, or

H2TU-R HDSL2), then press ENTER .

Press the SPACEBAR until Alarm History is selected, then press ENTER .

•

Press N or P to page through the alarm history screens.

Press L to clear the selected alarm history screen.

Alarm History at the DS1 Interface

The Alarm History screen reports DS1 statistics for the H2TU-C, shown in Figure 25 below, and the H2TU-R,

shown in Figure 26 on page 45, on a continuous basis. The types of alarms reported are described in Table 17 on

page 45. Current alarms are shown in reverse video.

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H2TU-C DS-1 Alarm History

-----------------------------------------------------------------------------

Alarm

First

Last

Status

Count

SPTE

SPTF

LLOS

LAIS

DBER

DISABLED

Press: C(l)ear Alarm History

------------------------------------------------------------------------------

Use <Space> to cycle through

choices and <Enter> to view

ID: xxxx--xxxx--xxxx--xxxx

Interface : H2TU-C DS-1

Statistics : Alarm History

08/01/2001 07:05:33

H2TU-C

System: Alarm

Figure 25. H2TU-C DS1 Alarm History Screen

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LTPH-UM-1049-02, Issue 2

Monitoring System Activity and Performance

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H2TU-R DS-1 Alarm History

-----------------------------------------------------------------------------

Alarm

First

Last

Status

Count

RLOS

RAIS

RAI

TX RAI-CI

PRM-NE

PRM-FE

DBER

08/16/01 00:37

08/16/01 00:45

Press: C(l)ear Alarm History

------------------------------------------------------------------------------

Use <Space> to cycle through

choices and <Enter> to view

ID: xxxx--xxxx--xxxx--xxxx

Interface : H2TU-R DS-1

Statistics : Alarm History

08/01/2001 07:05:33

H2TU-C

System: Alarm

Figure 26. H2TU-R DS1 Alarm History Screen

Table 17. DS1 Alarm Descriptions

Screen Alarm Front-Panel Alarm Description

H2TU-C DSI Alarms (see Figure 25 on page 44)

SPTE

Split Equipment

A test mode initiated by the HMU which splits the AUX port’s DSX-1 payload and sends it to the

MUX port.

SPTF

Split Facilities

A test mode initiated by the HMU which splits the AUX facility DS payload from the AUX port

#1 and sends it to the MUX port.

LLOS ^(a)

LAIS

LLOS

LAIS

Local Loss of Signal—Loss of the H2TU-C DSX-1 input signal.

Line Alarm Indication Signal—Indicates an AIS (all ones) pattern is being detected at the

H2TU-C DS1 input port. The ALMP option determines whether AIS (default) or LOS is sent

towards the CPE.

DBER

xxx-DBER

Bit Error Rate—The DS1 BER has exceeded the built-in 24-hour threshold limits of

approximately 10^-6. (xxx denotes either TUC or TUR.)

H2TU-R DS1 Alarms (see Figure 26 above)

RLOS^(a)

RAIS

RLOS

RAIS

Remote Loss of Signal— Loss of the H2TU-R DS1 input signal.

Remote Alarm Indication Signal—AIS is being detected at the H2TU-R DS1 input port. By

default (see Figure 30 on page 54) AIS-CI ^(b)is sent toward the network.

RAI

RRAI

TRCI

Remote Alarm Indication—Indicates an RAI alarm (yellow) from the CPE with errors from the

line unit or network.

TX RAI-CI

Transmit RAI-CI - Remote Alarm Indication at the H2TU-R—Upon reception of an RAI (yellow

LED) from the CPE, the H2TU-R sends an RAI-CI towards the network if the network signal

received at the H2TU-R is clear. If the network signal is impaired (LOS, AIS or LOF), then the

RAI is passed on to the network unaltered. This is applicable to SF or ESF framing. In an all SF

environment, RACI must be enabled to convert SF-RAI to SF-RAI-CI.

PRM-NE

PRM-FE

PRMN

PRMF

Performance Report Monitoring - Near End—The count of the PRM-NE register at the H2TU-R

exceeds the 10^-6BER threshold at 648 events since 12:00:00 AM.

Performance Report Monitoring - Far End—The count of the PRM-FE register at the H2TU-R

exceeds the 10^-6BER threshold at 648 events since 12:00:00 AM.

Continued

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Monitoring System Activity and Performance

LTPH-UM-1049-02, Issue 2

Table 17. DS1 Alarm Descriptions (Continued)

Screen Alarm Front-Panel Alarm Description

DBER xxx-DBER Bit Error Rate—The DS1 BER has exceeded the built-in 24-hour threshold limits of

approximately 10^-6. (xxx denotes either TUC or TUR.)

(a) This is a DS1-specific alarm that also issues a minor alarm (sent to the management unit or the backplane), if enabled.

(b) AIS-CI is a modified AIS alarm pattern. Equipment not suited to detect AIS-CI still detects this signal as an AIS. AIS-CI is sent

toward the network indicating that an LOS (RLOS) or AIS (RAIS) has been received from the CPE.

Alarm History at the HDSL2 Interface

Figure 27 shows the H2TU-C HDSL2 alarm history and Table 18 describes the alarms.

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H2TU-C HDSL2 Alarm History

-----------------------------------------------------------------------------

Alarm

First

Last

Status

Count

MTAE

MTAF

LOSW

MAL

HBER

SHORT

GND

08/16/01 00:37

08/16/01 00:45

OPEN

Press: C(l)ear Alarm History

------------------------------------------------------------------------------

Use <Space> to cycle through

choices and <Enter> to view

ID: xxxx--xxxx--xxxx--xxxx

Interface : H2TU-C HDLS2

Statistics : Alarm History

08/01/2001 07:05:33

H2TU-C

System: Alarm

Figure 27. H2TU-C HDSL2 Alarm History Screen

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LTPH-UM-1049-02, Issue 2

Monitoring System Activity and Performance

Table 18. HDSL2 Alarm Descriptions

Front-Panel Alarm Description

Screen Alarm

MTAE

MTAF

LOSW

MAL

MTAE

Metallic Test Access Equipment—The H2TU-C is in its MTA/LOSW test state.

Metallic Test Access Facility—The H2TU-C is in its MTA/LOSW test state.

Loss of Sync Word—The HDSL2 loop has lost synchronization.

MTAF

LOSW

xxx-MAL

Margin—The margin on the HDSL2 loop has dropped below the minimum threshold value

set for the system. (xxx denotes either TUC or TUR.)

xxx-LA

Loop Attenuation—The attenuation on the HDSL2 loop has exceeded the maximum value

set for the HDSL2 loop attenuation threshold. (xxx denotes either TUC or TUR.)

HBER

xxx-HBER

Block Error Rate—The HDSL2 BER has exceeded the set threshold limits of 10^-6or 10^{- 7}.

(xxx denotes either TUC or TUR.)

SHORT ^(a)

GND ^(a)

OPEN ^(a)

PWR FEED SHRT

PWR FEED GND

PWR FEED OPEN

Indicates a short between the Tip and Ring of the HDSL2 pair.

The HDSL2 loop is grounded.

Indicates a line power open condition.

(a) Displays only on the H2TU-C HDSL2 interface.

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Monitoring System Activity and Performance

LTPH-UM-1049-02, Issue 2

USING THE SYSTEM EVENT LOG TO TRACK EVENTS

To view a running log of system events, press E to select the Event Log. The Event Log displays the date and

time of the 100 most recent events (most recent displayed first) and provides a description of each event. Table 19

on page 49 lists the event log messages.

•

Press N or P to page through the event log.

Press T to return to the top of the log.

Press L to clear the event log.

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System Event Log (Page 1 of 7)

-----------------------------------------------------------------------------

Origin

Date and Time

Entry

System

H2TU-C

H2TU-R

07/21/01 12:25:00

07/22/01 12:25:00

07/23/01 12:25:00

07/24/01 12:25:00

07/25/01 00:13:32

07/26/01 00:13:27

07/27/01 00:13:27

07/28/01 00:11:16

07/29/01 00:10:43

07/30/01 00:10:30

07/31/01 00:04:11

08/01/01 00:00:40

08/02/01 00:00:02

DS1 Alarm Register reset

HDSL2 Alarm Register Reset

DS1 Performance Register Reset

HDSL2 Performance Register Reset

Time set 12:25:00

Date set 10/21/00

NLOC: Loop-down

NLOC: Loop-up

DS1 LOS Alarm: End

DS1 LOS Alarm: Begin

DS1C: AUTO to AMI

HDSL2 LOSW Alarm: End

HDSL2 LOSW Alarm: Begin

10 H2TU-R

11 System

12 H2TU-C

13 H2TU-C

14 - EMPTY -

15 - EMPTY -

Press: (N)ext Page, (P)revious Page, (T)op of Log, C(l)ear Log

ID: xxxx--xxxx--xxxx--xxxx 08/01/2001 07:07:54 H2TU-C System: OK

Figure 28. System Event Log

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LTPH-UM-1049-02, Issue 2

Monitoring System Activity and Performance

Table 19. Event Log Entry Messages List

Event Log Messages

Any DS1 Alarm History reset

Any DS1 PM register reset

Any HDSL2 Alarm History reset

Any HDSL2 PM register reset

Any Loop Down (any segment)

Any Loop Up (any segment)

Any provisioning option change: <provisioning mnemonic>: changed from <old> to <new>

CPE DBER alarm (1-day threshold crossed of any PM data except PRM-NE or PRM-FE)

CPE DS1 AIS begins/ends

CPE DS1 LOS begins/ends

CPE PRM-NE BER alarm (at the remote only: 1-day threshold crossed of PRM-NE: trouble on CPE receive)

Current statistics reset

Event Log reset

H2TU-C Power up/down

H2TU-R Power up/down

HDSL2 DC pair open begins/ends on any segment

HDSL2 Ground fault begins/ends on any segment

HDSL2 HBER alarm (threshold crossed) on any segment.

HDSL2 loop attenuation (threshold crossed) on any HDSL2 interface

HDSL2 margin alarm (threshold crossed) on any HDSL2 interface

HDSL2 unavailability begins/ends on any segment

Master zero reset

NTWK DBER alarm (1-day threshold crossed of any PM data)

NTWK DS1 LOS begins/ends

NTWK PRM-FE BER alarm (at the remote only: 1-day threshold crossed of PRM-FE: trouble on NTWK far end)

NTWK DS1 AIS begins/ends

Power Feed Open begins/ends

Power Feed Short begins/ends

RAI begins/ends

TX RAI-CI begins/ends (RAI-CI sent from the remote towards the network)

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Monitoring System Activity and Performance

LTPH-UM-1049-02, Issue 2

USING THE REPORT MENU

The Report menu (Figure 29) provides screens containing status and performance monitoring data for line and

remote units which can be downloaded to a file for analysis or future reference. Table 20 on page 51 describes the

four types of reports provided by the Report menu.

To select each individual report, do the following:

Press O to select Report menu.

Press the SPACEBAR to select a report.

Use your terminal emulation software (HyperTerminal or Procomm) to capture the selected report to your

printer. Press ENTER to generate.

End the captured report.

Press CTRL + R to refresh the Report menu screen.

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Report Type : Full Report

Please select report type by pressing <Space>,

and press <Enter> to generate the report.

then start terminal logging

ID: xxxx--xxxx--xxxx--xxxx

08/01/2001 07:07:54

H2TU-C

System: OK

Figure 29. Report Menu - Full Report

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LTPH-UM-1049-02, Issue 2

Monitoring System Activity and Performance

Table 20. Report Types

Type

Contains the following information:

Circuit and unit identifications

Full Report

•

Product information

System configuration

Current performance statistics

Alarm history

Performance history

System event log

Product information

Short Report

System configuration

Current performance statistics

Circuit and unit identification

Circuit and unit identifications

Product information

System Information Report

Event Report

System configuration

Circuit and unit identifications

Product information

System event log

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Testing

LTPH-UM-1049-02, Issue 2

TESTING

This section provides information about front-panel system alarms, LOS and AIS response, OCT55 test

procedure, and loopback testing.

SYSTEM ALARMS

Table 21 summarizes all possible system alarms in order of priority as they appear on the front panel. When

multiple alarms occur, the front-panel display only reports the highest priority alarm. The alarm history screens

display alarms also, but provide greater detail (see “Using the Performance Screens to View Alarm Data ” on

page 44). All alarms that are not inhibited will drive the front-panel Status LED to a flashing red alarm state.

Table 21. Front-Panel System Alarms Summary

Front-Panel

Alarm

Description

To Inhibit:

Message ^(a)

PWR FEED SHRT ^(b)Power Feed Short

A short exists between the Tip and Ring of the

HDSL2 pair.

The HDSL2 loop is grounded.

Cannot be inhibited.

PWR FEED GND ^(b)

Power Feed Ground

Cannot be inhibited.

Sets MTA option to disabled.

Sets ADS1 option to MUX or

PWR FEED OPEN ^(b)Power Feed Open

A line power open condition exists.

LOSW ^(b)

MTA

Loss of Sync Word ^(c)The HDSL2 loop has lost synchronization.

Metallic Test Access

Split Equipment

The H2TU-C is in its MTA/LOSW test state.

SPTE

A test mode initiated by the HMU which splits the

AUX port’s DSX-1 payload and sends it to the MUX CTHR.

port.

SPTF

Split Facilities

A test mode initiated by the HMU which splits the

facility DS1 payload from the AUX port #1 and sends CTHR.

it to the MUX port.

Sets ADS1 option to MUX or

LLOS^(b)

RLOS^(b)

LAIS

Local Loss of Signal

Loss of the DSX-1 input signal.

Cannot be inhibited.

Local Alarm Indication Indicates an AIS (all ones) pattern is being received Cannot be inhibited.

Signal at the H2TU-C input port.

Remote Loss of Signal Loss of the H2TU-R DS1 input signal.

RAIS

RRAI

AlarmIndicationSignal Indicates an AIS (all ones) pattern is being received Cannot be inhibited.

at the H2TU-R

at the H2TU-R DS1 input port.

Remote Alarm

Indication

Remote Alarm Indication at the H2TU-R Indicates an Cannot be inhibited.

RAI alarm (yellow LED) from the CPE with errors

from the line unit or network.

LRAI

TRCI

Remote Alarm

Indicator - Customer

Installation

Indicates an RAI alarm (yellow LED) from the CPE

with an error-free signal from the line unit or

network.

Cannot be inhibited.

Remote Alarm

Upon reception of an RAI (yellow LED) from the

Cannot be inhibited.

Indication - Customer CPE, the H2TU-R sends RAI-CI toward the network

Installation

if the network signal received at the H2TU-R is clear.

If the network signal is impaired (LOS, AIS, or LOF),

then the RAI is passed on to the network unaltered.

xxx-DBER

DS1 Bit Error Rate

The DS1 BER has exceeded the set 24-hour

Select DIS for the DBER

threshold limit of approximately 10^-6. (xxx denotes system option.

either TUC or TUR. If TUC and TUR occur at the

same time, then TUC displays.)

PRMF

PRMN

Performance Report

Messaging - Far End

Performance Report

Messaging - Near End exceeded.

Indicates H2TU-R PRM-FE BER threshold is

exceeded.

Indicates H2TU-R PRM-NE BER threshold is

Set DBER threshold to DIS.

Continued

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LTPH-UM-1049-02, Issue 2

Testing

Table 21. Front-Panel System Alarms Summary (Continued)

Front-Panel

Alarm

Description

To Inhibit:

Message ^(a)

xxx-HBER^(b)

HDSL2 Block Error

Rate

The HDSL2 BER has exceeded the set threshold

limits of 10^-6or 10^{- 7}. (xxx denotes either TUC or

TUR. If TUC and TUR occur at the same time, then

TUC displays.)

Select NONE for the HBER

system option.

xxx-MAL

xxx-LA

Margin Alarm

The margin on the HDSL2 loop has dropped below Set the Margin Alarm

the minimum threshold value set for the system.

(xxx denotes either TUC or TUR. If TUC and TUR

occur at the same time, then TUC displays.)

Threshold option to 0 (zero).

Loop Attenuation

The attenuation on the HDSL2 loop has exceeded the Set the HDSL2 Loop

maximum value set for the HDSL2 loop attenuation Attenuation Threshold

threshold. (xxx denotes either TUC or TUR. If TUC

and TUR occur at the same time, then TUC displays.)

option to zero.

(a) The message, ALRM, displays prior to any alarm message.

(b) Only these alarms assert the System Alarm bus on pin H of the card edge connector, if the alarm system is set to ENABLE.

the front panel status LED flashes red, and the ACQ or SIG message displays instead of the ALRM message.

Alarm Option for the Digital Loop Carrier Feed

To improve HiGain HDSL2 compatibility with the switch-to-protect features used in the Digital Loop Carrier

(DLC) feeder applications, the H2TU-C has an Alarm Pattern (ALMP) option that allows you to select either an

AIS or LOS DS1 output payload for the following alarms:

•

LOSW on any loop

LOS DS1

Retiring System Alarms

To retire a system alarm, press the LBK pushbutton and execute an Alarm Cutoff (ACO). An ACO turns the alarm

off and replaces the ALRMmessage with an ACOmessage. The second part of the ALRMmessage, which defines

the cause of the alarm, remains. Both parts of the message remain until the alarm condition clears or another higher

priority alarm occurs.

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Testing

LTPH-UM-1049-02, Issue 2

Remote LOS and AIS Response

Figure 30 shows the differing ways the H2TU-R can respond to the network, depending on the configuration of

the TLOS, NLBP, FT1, ALMP, and NAIS configuration options described in Table 5 on page 18 and Table 6 on

page 19 . See Table 13 on page 27 for the response of the H2TU-C and H2TU-R to LOS and AIS alarm conditions.

YES

LOS event?

[ENA]

Loopback to Network

LOS to CPE

TLOS

[DIS]

[LOS]

NLBP

YES

Remove alarm

pattern

AIS event?

[AIS]

AIS to CPE

[ENA]

FT1 idle to NET & CPE

FT1

[DIS]

ADC Option

[LOS]

[AIS]

ALMP

[AIS]

Pass on LOS to NET

Standard Option

Default configurations

are in bold.

NAIS

Send AIS to NET

[CI]

Send AIS-CI to NET

Figure 30. H2TU-R LOS and AIS Response Priorities

OCT55 TEST PATTERN WITH AMI LINE CODE

The OCT55 test pattern can be used in unframed mode to stress the system and verify data integrity. In an SF or

ESF framing mode, excessive zero anomalies may occur, which causes the H2TU-C to report ES, SES, and UAS

errors according to ANSI T1.231-1997.

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LTPH-UM-1049-02, Issue 2

Testing

LOOPBACK OPERATION

HiGain HDSL2 has a family of loopback options for analyzing circuit functionality. The loopback signal is

transmitted and returned to the sending device for comparison. This allows you to verify the integrity of the

HDSL2 channels to the H2TU-C, the H2TU-C DSX-1 interface and the DS1 channels to the customer. Loopback

options include:

•

Generic Loopback (GNLB) commands, including the SmartJack (SMJK) option (see Table 22 on page 56)

Special Loopback (SPLB) commands (see “Special Loopback Commands ” on page 56) and the following

command tables:

–

Addressable Repeater Loopback commands: A2LB (see Table 21 on page 52)

Addressable Repeater Loopback commands: A3LB, A4LB (see Table 24 on page 64)

Loopback commands can be initiated by:

•

Selecting the loopback type using the MODE and LBK pushbuttons on the H2TU-C front panel or the manual

loopback (LBK) pushbutton on the H2TU-R.

Selecting the loopback type from the Monitor menu when connected to the craft port of the H2TU-C or

H2TU-R

Entering the loopback code into the test equipment connected to the H2TU-C or H2TU-R.

Activate loopback using

one of the following:

• MODE/SEL pushbuttons

• Maintenance terminal

• Test set

Activate loopback using

one of the following:

• Loopback pushbutton

• Maintenance terminal

• Test set

NREM

SMJK

TLOS

NLOC

CREM

CLOC

H2TU-C

H2TU-R

Customer

Premises

Network

Figure 31. Loopback Summary

HiGain supports multiple loopbacks, but a single loopback is the preferred method.

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Testing

LTPH-UM-1049-02, Issue 2

Generic Loopback Commands

The HiGain HDSL2 Generic Loopback (GNLB) commands allow you to use in-band codes to loop up either

NLOC (4-in-7) or NREM (3-in-7) towards the network. In addition, these in-band codes loop up CREM (6-in-7)

or CLOC (5-in-7) towards the customer. Either loopup condition can be terminated (looped down) with the 3-in-5,

SMJK loopdown code. All in-band codes must be present for at least 5 seconds before the HiGain HDSL2 system

responds. TLOS is a logic loopback caused by loss of the DS1 input from the CI.

Figure 31 on page 55 summarizes the available loopbacks in the system, and Table 22 on page 56 summarizes the

HiGain HDSL2 generic loopback commands. See “GNLB Test Procedures ” on page 59 for the test procedures

that apply when using the GNLB mode.

Table 22. Summary of HiGain HDSL2 Generic Loopback Codes and Activation Methods

Method of Activation

Loopback

Code

Description

Test Set

Craft Port

MODE/LBK

NLOC

1111000

4-in-7

DSX-1 signal is looped back to the network at the H2TU-C.

NREM

CLOC

CREM

1110000

3-in-7

DSX-1 signal is looped back to the network at the H2TU-R.

1111100

5-in-7

Signal from the customer is looped back to the customer

at the H2TU-R.

1111110

6-in-7

Signal from the customer is looped back to the customer

at the H2TU-C.

Special Loopback Commands

In addition to the GNLB loopback command mode, a HiGain HDSL2 system can be configured for one of three

special loopback command modes. These are selected from the maintenance terminal Config menu, ADC Options

screen (see Table 5 on page 18) or by using the MODE and LBK pushbuttons (see Figure 32 on page 60). Once a

loopback mode is activated, other loopback commands can be sent by a test set connected to the craft port of the

H2TU-C or H2TU-R (see Table 22 on page 56 and Table 24 on page 64 for list of SPLB commands).

A2LB through A4LB are special, addressable, repeater loopback modes that are supported by the H2TU-C. These

loopback modes provide the HiGain HDSL2 system with sophisticated maintenance and troubleshooting tools.

A2LB is patterned after the Teltrend addressable T1 repeater loopbacks. A3LB and A4LB are patterned after the

Wescom addressable T1 repeater loopbacks.

All three SPLBs have been enhanced to handle the specific requirements of the following HiGain HDSL2

customers:

•

A2LB (Teltrend) = Southwestern Bell

A3LB (Wescom) = New England Telephone, Bell Atlantic

A4LB (Wescom Mod 1) = New York Telephone

A2LB can be configured to do one of the following:

•

Block the arming code (after 2 seconds) from exiting the H2TU-C into the network, and replace it with the

AIS code.

•

Unblock the AIS code by executing the Far-End Activate code.

A3LB and A4LB are identical because all of the SMJK loopup and loopdown commands are under control of the

LPBK setting.

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LTPH-UM-1049-02, Issue 2

Testing

SmartJack Loopback Commands

The HiGain HDSL2 SmartJack (SMJK) Loopback (LPBK) commands allow you to use in-band, out-of-band, and

universal codes to initiate and terminate loopback testing of the HiGain HDSL2 circuit. (See “SmartJack Test

Procedure ” on page 64 for additional information.)

MANUAL LOOPBACK SESSION

A manual loopback session allows you to select any one of the HiGain HDSL2 loopbacks listed in Table 22 on

page 56.

Setting the Loopback Time-Out Option

Before initiating a loopback session, verify that the Loopback/MTA Time-out parameter is set to the desired

setting.

Use the MODE and LBK pushbuttons as described in “Setting Options through MODE and LBK ” on page 10.

The Loopback Time-out parameter is also user-selectable from the System Settings screen when using a

maintenance terminal.

Select the desired setting:

•

NONE (time-out disabled)

20 minutes

60 minutes

120 minutes (default setting)

Activating Manual Loopback Mode

With the exception of SmartJack, any of the HiGain HDSL2 loopbacks can be executed using the

MODE and LBK pushbuttons.

When executing a manual loopback session using the MODE and LBK pushbuttons:

•

The next loopback option can be displayed by pressing the MODE pushbutton, however, the

previously activated loopback remains active until the LBK pushbutton is pressed, which

activates the new loopback.

•

If neither pushbutton is pressed for a period of 30 seconds and no loopback is in effect, the

manual loopback session terminates and the display returns to normal mode.

If any loopback is in effect, the 30-second time-out is inhibited. The active loopback and the

manual loopback session continue until the loopback times out in accordance with the LBTO

setting.

•

Only the SMJK loopback can exist with other network loopbacks at any given time.

If there is an active loopback, pressing the MODE and LBK pushbuttons for 3 or more

seconds terminates any active loopback, ends the manual loopback session and returns the

display to normal mode.

To initiate a manual loopback session:

Press both the MODE and LBK pushbuttons on the front panel for at least 3 seconds. The following message

appears on the front-panel display:

MAN LPBK NLO?

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Testing

LTPH-UM-1049-02, Issue 2

Press LBK to activate NLOC. The display changes to MAN LPBK NLOC.

Press MODE to advance to the next available loopback:

•

NRE? = NREM

CRE? = CREM

CLO? = CLOC

Press LBK to activate the selected loopback. The previous loopback is terminated.

Once a loopback is selected and activated, the loopback stays active until it times out (based on the LBTO setting).

When a loopback times out, the display then returns to the normal display mode.

You can terminate loopbacks manually and exit the MAN LPBK mode by simultaneously pressing the MODE

and LBK pushbuttons for 3 or more seconds. If no loopback is active, the MAN LPBK mode automatically

terminates after 30 seconds.

All loopbacks can be initiated by in-band commands in the DS1 payload or by a command from the HiGain

HDSL2 system (front-panel pushbuttons or maintenance screen selections). Therefore, whenever a loopback is

active, the method by which it was activated is indicated in the loopback and status information (Monitor screen)

by the annotation HG (HiGain HDSL2) or PL (Payload) adjacent to the identified loopback. For example,

NREM-HG indicates that the loopback was initiated by the HiGain HDSL2 system.

SMJK loopback commands are only activated by in-band commands.

ACTIVATING MANUAL METALLIC TEST ACCESS

A Metallic Test Access (MTA) test mode can be initiated with the front panel MODE and LBK pushbuttons in

the same way the manual loopbacks can be initiated. This choice is presented at the end of the MAN LPBK

sequence of choices.

To initiate a manual MTA session:

Press both the MODE and LBK pushbuttons on the front panel for at least 3 seconds. The following message

appears on the front-panel display:

MAN LPBK NLO?

Press MODE to advance to the last choice in the following sequence:

• CRE?

• NRE?

• CLO?

• NLO?

• MTA?.

Press LBK to activate the MTA test mode. This terminates any active loopbacks.

Once selected, the display changes to MAN MTA.

Once the MTA mode is selected and activated, the MTA mode remains active until it times out based on the LBTO

setting. When the MTA mode times out, the display then returns to the normal display mode.

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LTPH-UM-1049-02, Issue 2

Testing

You can also manually terminate the MTA state and exit the MAN LPBK mode by simultaneously pressing the

MODE and LBK pushbuttons for 3 or more seconds. If no loopback or MTA is active, the MAN LPBK mode

automatically terminates after 30 seconds.

IN-BAND LOOPBACK SESSIONS

The following sections provide step-by-step test procedures for verifying the integrity of the HDSL2 channels at

every module location as well as the DS1 channels to the customer and the local DSX-1 interface.

General Troubleshooting Tips

If trouble is encountered on the DSX-1 interfaces of the H2TU-C, verify that the:

•

H2TU-C is making a positive connection with its shelf connector.

H2TU-C internal equalizer is set to the correct distance range, as shown in Table 5 on page 18. All equalizers

should be set to the distance from the DSX-1 to the shelf.

The transmit and receive DSX-1 ports have splitting access jacks and miniature, 210-series, bridging jacks as

shown in Figure 1 on page 3. Connecting one cable between the two bridging jacks and another between the two

LINE jacks splits the IN and OUT and creates metallic loopbacks toward both the DSX-1 and the H2TU-C. If

separate plugs are inserted into both LINE jacks with the other end disconnected, the BRG jacks can be used to

send and receive test patterns toward the DSX-1. The AUX DSX-1 port has no resident test jack access.

The equalizer settings only apply to the specific DSX-1 port selected by the ADS1 option, MUX

or AUX. The unselected port defaults to an equalizer setting of zero.

GNLB Test Procedures

Figure 32 on page 60 is a graphical representation of the various loopback configurations with the associated

GNLB commands shown. Table 22 on page 56 for a description of these commands.

To perform the GNLB loopback test procedure:

Have the CO tester send the NREM (3-in-7) in-band loopup code for 5 seconds. You should be able to observe

the NREM message on the front-panel display. The Status LED on the front panel should be green, and the

loopback mode should also be identified on the Monitor screen.

Have the CO tester transmit a DS1 test signal toward the H2TU-C and verify that the returned (looped) signal

to the test set is error-free.

If Step 2 fails, have the CO tester transmit the (3-in-5) in-band loopdown code.

Have the CO tester send the NLOC (4-in-7) in-band loopup for 5 seconds. You should be able to observe the

NLOC message on the front-panel display. The Status LED on the front panel should be yellow, and the

loopback mode should also be identified on the Monitor screen.

Repeat Step 2. If the test passes, the problem is in the downstream direction. If it fails, the problem is in the

upstream direction.

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Testing

LTPH-UM-1049-02, Issue 2

Loopbacks Toward Network

TLOS*

HRU-412

HDSL2 SPAN

H2HTLUU-C

All ones

LOGIC

HRU-412

H2TU-R

SMJK*

1000000

11000

1-in-6

HRU-412

H2TU-C

HLU

HDSL2 SPAN

2-in-5

H2TU-R

✝

FF02

NREM*

C742 ‡

HRU-412

3 in 7

1110000 H3R-inU--7412

H2TU-C

HLU

All ones

HRU-412

H2TU-R

✝

D3D3 ‡

FF1E

NLOC

CLOC

1111000

HRU-412

H2TU-R

5 IN 7

4-in-7

HLU

HDSL2 SPAN

H2TU-C

HRU-412

3F1E

✝

Loopbacks Toward Customer

CREM

D3D3 ‡

1111110

HDSL2 SPAN

All ones

HLU

6-in-7

H2TU-R

H2TU-C

✝

3F02

C742 ‡

CLOC

HRU-412

5-5inIN-77

1111100

HDSL2 SPAN

HLU

H2TU-C

HHR2UTU-4-1R2

* Set the NLBP option to AIS to send AIS (indicated by an all ones pattern) for any network loopback.

✝

A3LB and A4LB loopback codes.

‡ A2LB loopback code.

GNLB loopback codes.

Figure 32. Loopback Modes

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LTPH-UM-1049-02, Issue 2

Testing

A2LB Test Procedures

Using the codes listed in Table 23, a network tester can activate NLOC or NREM loopbacks (or SMJK, if

enabled). A tester at the customer premises can activate CLOC or CREM loopbacks. All loopbacks shown in

Table 23 can also be initiated from the H2TU-C front-panel MODE and LBK pushbuttons (see “Setting Options

through MODE and LBK ” on page 10).

Table 23. Addressable Repeater Loopback Commands (A2LB)

Binary Code ^(a)

(Hexadecimal Equivalent)

Loopback

Description

ARMING or NI LPBK (in-band)

11000-11000 ...

Arming code

ARMING or NI LPBK (ESF Data Link)

IR LPDN or DISARM (in-band)

IR LPDN or DISARM (ESF Data Link)

1111-1111-0100-1000 (FF48)

11100-11100 ...

Arming code

Disarming code

1111-1111-0010-0100 (FF24)

1101-0011-1101-0011 (D3D3)

IOR LPBK (NLOC or CREM)

230-232 bit errors

NLOC—DSX-1 signal is looped back to the network at

the H2TU-C.

CREM—Signal from customer is looped back to the

customer at the H2TU-C.

229-231 bit errors ^(b)

ILR-2 LPBK (NREM or CLOC)

20 bit errors ^(c)

1100-0111-0100-0010 (C742)

NREM—DSX-1 signal is looped back to the network at

the H2TU-R.

CLOC—Signal from customer is looped back to the

customer at the H2TU-R.

IR LPDN (except SMJK)

IR QUERY LPBK

1001-0011-1001-0011 (9393)

1101-0101-1101-0101 (D5D5)

1101-0101-1110-1010 (D5EA)

1101-0101-1101-0110 (D5D6)

1100-0101-0101-0100 (C554)

0110-0111-0110-0111 (6767)

Loopdown (H2TU-C or H2TU-R)

Query loopback

IR ALTERNATE QUERY LPBK

TIME-OUT OVERRIDE

Alternate query loopback

Loopback time-out override

Unblock AIS

FAR END NI ACTIVATE

IOR POWER DOWN (H2TU-C) ^(d)

Removes HDSL2 line power

(a) The leftmost bit arrives first in all sequences. The detection algorithm functions reliably with a random 10^-3Bit Error Rate (BER)

on the facility. The entire arming and loopback sequence can also be initiated at the remote H2TU-R location.

(b) The H2TU-R identifies CREM (and the H2TU-C identifies NLOC) with 231 bit errors, excluding the frame bits. When framed

data is being sent in the AUTO framing mode, the number of the 231 bit errors detected by the test set varies from 229 to 231,

depending on whether or not the test set counts frame errors as bit errors, and on the number of frame bits contained in the

block of 231 error bits. The H2TU-R and H2TU-C generate this bit pattern in a series of discontinuous bursts containing 20-bit

errors each, excluding frame bits. Those test sets that do not count frame error bits as data bit errors will indicate fewer bits than

the H2TU-R and H2TU-C transmit for a CI and NI loopback.

(d) The IOR Power Down code must remain present for the duration of the powerdown mode. When this code is removed, the

HiGain system returns to its normal unlooped and unarmed state.

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LTPH-UM-1049-02, Issue 2

To perform the A2LB test procedures:

Send the in-band Arming and NI LPBK code 11000 to the H2TU-C for at least 5 seconds.

Monitor the output of the H2TU-C for the return of the pattern. Return of the pattern indicates one of the

following:

•

The H2TU-R has looped up, if the SMJK Loopback option is enabled.

An external NID has looped up, if the SMJK Loopback option is disabled, and the H2TU-C and H2TU-R

have been armed.

Verify, if possible, that the H2TU-R Loopback LED is either flashing yellow at 4-second intervals (indicating

that the system is armed), or is a steady yellow (indicating that it is both armed and in SMJK loopback). The

H2TU-C Status LED also flashes yellow when the system is armed.

If the Arming code is not returned after 5 seconds, the system may be armed, but there is no

active loopback.

Once armed, the H2TU-C can be looped back by sending Intelligent Office Repeater (IOR) LPBK activation

code 1101-0011-1101-0011 (D3D3) for at least 5 seconds. You should observe the following activation

response pattern:

2 seconds of AIS (all ones pattern)

2 seconds of returning data pattern

Logic errors (including the frame bit) occurring in the returned pattern comprising:

–

231 errors, if IOR LPBK (H2TU-C) was sent

20 errors, if ILR-2 (H2TU-R) was sent

Normal looped data

This error pattern repeats every 20 seconds as long as the IOR loopback pattern is being sent. This also applies

to ILR, Time-out Override, and Query commands.

Some Intelligent Repeater (IR) test sets do not count frame errors as bit errors when the test

pattern is framed and the H2TU-C is set to the Auto framing mode. To improve compatibility with

those test sets, the H2TU-C generates 231 (NLOC and CREM) ID bit errors. As a result, the

H2TU-C may indicate one more or one less bit error, depending on the test set type and the

number of frame bits contained in the block of errored bits. To avoid this uncertainty, ADC

recommends sending unframed IR commands.

The H2TU-C is now in logic loopback if the IOR NLOC loopback command was sent. The Time-Out

Override command or a Loopdown command can override the selection made for the loopback time-out (see

“Setting the Loopback Time-Out Option ” on page 57). If the Time-Out Override code 1101-0101-1101-0110

(D5D6) is received after activating a loopback, then the automatic timed expiration of the loopback is

inhibited. If this Time-Out Override is sent, then the only way to loop the H2TU-C down is to do one of the

following:

•

Issue the IR (Intelligent Repeater) LPDN (loopdown) code 1001-0011-1001-0011 (9393).

Issue the NI LPDN and Disarm in-band code 11100 or the ESF DL code (FF24).

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LTPH-UM-1049-02, Issue 2

Testing

The Time-out Override function is only valid for the current active loopback. The automatic

time-out timer is restored during subsequent loopback sessions.

Once the test is complete, do one of the following:

•

If the system is to loopdown but remain Armed, send the IR (Intelligent Repeater) LPDN code for

universal loopdown.

•

If all the equipment is to be looped down, disarmed and returned to normal operation, send the disarm

in-band code 11100 or the ESF DL code (FF24).

The Armed mode has an automatic time-out of 120 minutes, but this timer is reset to 120 for any

of the following events:

•

Loopback terminates (manually or time-out)

Query

Alternate query

Far-End activate

Another ARM command

This timer is inhibited while any of the valid command codes are being sent. Once the codes

are removed, the timer restarts at 120.

H2TU-C-319 List 4E

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Testing

LTPH-UM-1049-02, Issue 2

A3LB and A4LB Test Procedures

The H2TU-C can be looped back by sending the Addressable Office Repeater (AOR) LPBK activation code

1111-1111-0001-1110 (FF1E) for at least 5 seconds. This causes the H2TU-C to enter the NLOC state. The

Loopback Time-out setting (see “Setting the Loopback Time-Out Option ” on page 57) determines the duration of

this loopback unless it is overridden by the reception of a second identical 16-bit loopup command before the timer

expires. When this time-out override state exists, the only way to loop the H2TU-C down is to issue one of the

three loopdown commands listed in Table 25. The automatic time-out mode is restored during subsequent

loopback sessions.

Table 24 summarizes the codes required to execute Addressable 3 and 4 (A3LB and A4LB) repeater loopback

commands that are identified in H2TU-C HDSL2 products. All code sequences must be present for at least 5

seconds. Information specific to HiGain HDSL2 regenerators is shown in bold.

Table 24. Addressable Repeater Loopback Commands (A3LB and A4LB)

Name

Description

Binary Code ^(a)(Hexadecimal Equivalent)

NLOC

CREM

NREM

CLOC

H2TU-C loopup from NI

H2TU-C loopup from CI

H2TU-R loopup from NI

H2TU-R loopup from CI

1111-1111-0001-1110 (FF1E)

0011-1111-0001-1110 (3F1E)

1111-1111-0000-0010 (FF02)

0011-1111-0000-0010 (3F02)

(a) The leftmost bit arrives first in all sequences. The detection algorithm functions reliably with a random 10^-3Bit Error Ratio (BER)

on the facility. The entire loopback sequence can also be initiated at the remote H2TU-R location.

SmartJack Test Procedure

The HiGain H2TU-R supports the standard SmartJack loopback which can emulate a Network Interface Device

(NID) for the purpose of loopback testing of the HiGain HDSL2 circuit. SMJK and NREM loopbacks perform the

same functions, but their initiation differs. SMJK indicates that the loopback was initiated by any of the three

SmartJack loopup commands listed in Table 25. NREM, on the other hand, is initiated by the 3-in-7 in-band

command or by a command issued from the maintenance terminal.

The SmartJack loopback option, LPBK, enables or disables the ability of the H2TU-R to emulate the family of

SmartJack loopback commands listed in Table 25.

Table 25. SmartJack Loopup and Loopdown Commands

Out-of-Band

ESF-FDL Loopup

Codes

Out-of-Band

In-Band 2-in-5

Loopup Code

In-Band 3-in-5

Loopdown Code

In-Band 1-in-6

Loopup Code

In-Band 1-in-3

ESF-FDL Loopdown

(a)

Loopdown Code^(a)

(a)

Codes

11000

111000

1111-111-0100- 1000 1111-1111-0010-0100 100000

100

(a) These universal loopdown codes can release any and all existing loopup states regardless of loopback direction or method of

initiation. The codes are permanently enabled and independent of all loopback option settings, including the LPBK option.

January 9, 2002

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LTPH-UM-1049-02, Issue 2

Appendix A - Specifications

APPENDIX A - SPECIFICATIONS

Power

HDSL2 Span Voltage

CO Supply

0 or -180 5 Vdc

-48 Vdc nominal (-42.5 Vdc to -56.5 Vdc)

See “Power Consumption ” and “Maximum Power Dissipation ” and “Maximum

Current Drain ” on page 66.

Electrical Protection

Secondary surge and power cross protection on HDSL2 ports. Requires external

primary protection.

Fusing

Internal; connected to “FUSE ALARM” output on pin 10

Environmental

Operating Temperature

Operating Humidity

-40°F to +149°F (-40°C to +65°C)

5% to 95% (non-condensing)

Physical

Height

Width

4.750 in. (12.10 cm)

0.625 in. (1.59 cm)

10 in. (25.4 cm)

Depth

Weight

Mounting

0.5 lb (.23 kg)

3192 mechanics shelf

HDSL2

Line Code

Transmission

Media

1.552 Mbps OPTIS

Full duplex

One non-loaded, copper, two-wire cable pair

Output

+13.8 dBm 0.5 dB at 135Ω (0-450 kHz) at CO side;

+13.5 dBm 0.5 dB at 135Ω (0-350 kHz) at remote side

Line Impedance

135Ω

Maximum Provisioning Loss

Start-up Time

35 dB at 196 kHz

30 sec. typical, 1 min. maximum per span

DSX-1

DSX-1 Line Impedance

DSX-1 Pulse Output

DSX-1 Input Level

100Ω

6 V^pk-pkpre-equalized for 0-655 feet of ABAM cable

+1.5 to -7.5 dB DSX

System

One-way DS1 Delay

<400 µs per span without regenerators

Meets MTIE T1.101 requirements

0.2 UI maximum

Wander (Looped)

Wideband Jitter (Looped)

Narrowband Jitter (Looped)

0.1 UI maximum

H2TU-C-319 List 4E

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Appendix A - Specifications

LTPH-UM-1049-02, Issue 2

POWER CONSUMPTION

The three most important power parameters of an H2TU-C are its maximum power consumption, maximum

power dissipation, and maximum current drain.

Table 26 describes line-powered circuits on 9 kft, 26 AWG loops without a regenerator.

Table 26. H2TU-C-319 List 4E Power Parameters

-48 Vdc Power

Consumption

(Watts)

Heat Dissipation

(Watts)

-42.5 Vdc Current

(mA)

Remote Power Source

Maximum

Line-powered

12.25

8.7

7.25

6.75

292.0

207.0

Local-powered with Sealing Current

MAXIMUM POWER DISSIPATION

The Maximum Power Dissipation measures the power that is converted into heat that builds up within the unit. It

contributes to the total heat generated in the space around the unit. It is used to determine the maximum number

of fully loaded shelves per bay that does not exceed the maximum allowable power dissipation density in watts

per square foot to comply with GR-63.

In COs, the maximum power dissipation for open-faced, natural convection-cooled mountings is limited to

134.7 watts per square foot per GR-63-CORE. The footprint of a standard 28-slot, 23-inch HMS-317 shelf is 7.024

square feet. Therefore, the maximum bay dissipation is limited to 946 watts. Use this limit and the parameters in

Table 26 to determine the maximum number of H2TU-C circuits that can occupy one CO bay.

This is a worst case situation since it assumes the entire CO is subjected to the maximum power

density. More favorable conditions would permit increasing the number of shelves per bay

without jeopardizing the CO thermal integrity.

The thermal loading limitations imposed when using the H2TU-C in a Controlled Environmental Vault (CEV) or

other enclosures are determined by applying its power parameters to the manufacturer's requirements for each

specific housing.

The -48 Vdc Power Consumption is the maximum total power that the H2TU-C consumes or draws from the shelf

power source. This parameter is needed when the H2TU-C is in a location remote to the CO it is serving. It

determines the battery capacity required to maintain an 8-hour, standby battery reserve for emergency situations.

Battery capacity, therefore, limits the maximum number of line units which can be installed in a remote enclosure.

Use the data in Table 26 above to perform this analysis.

MAXIMUM CURRENT DRAIN

The Maximum Current Drain is the maximum current drawn from the shelf power supply when it is at its

minimum voltage (-42.5 Vdc). This determines the shelf fusing requirements. Use the -42.5 Vdc current data in

Table 26 above to determine the shelf fusing requirements for your particular H2TU-C applications.

January 9, 2002

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LTPH-UM-1049-02, Issue 2

Appendix A - Specifications

LOOP ATTENUATION, INSERTION LOSS, AND REACH

Each loop has no more than 35 dB of loss at 196 kHz, with driving and terminating impedances of 135Ω, as shown

in Table 27 below. This is equivalent to no more than 28 dB loop attenuation.

Table 27. HDSL2 Reach Chart

Insertion Loss ^(a)at

196 kHz (dB/kft)

Loop Attenuation

(dB/kft)

Maximum Reach

(kft)

Cable Gauge

Ω per kft

26/0.4 mm

24/0.51 mm

22/0.61 mm

19/0.91 mm

3.88

2.84

2.18

1.54

3.1

2.2

1.7

1.2

(a) Insertion Loss = 1.25 times loop attenuation

H2TU-C-319 List 4E

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Appendix A - Specifications

LTPH-UM-1049-02, Issue 2

H2TU-C-319 LIST 4E CARD-EDGE CONNECTOR

Figure 33 shows the pin assignments of the card-edge connector on the H2TU-C-319 List 4E card. The function

of its segments (S1, S2, and S3) are described beginning with “Test Access ” on page 28. Note that only the set of

Standard 3192 alphanumeric connector pins to Segment 3 (A through L and 1 through 10) are labeled on the

backplane of the HMS-358 shelf. The outer set of pin numbers are for reference only and do not appear on the

backplane. The AUX DSX-1 Segment 1 port can be accessed either by its wire wrapped pins or from mass

connector P11 (TX) and P10 (RX) on the HMS-358 backplane.

(IN)DSX-1Tip

DSX-1Ring(IN)

AUXPort

MUXPort

AUXPort

Segment1

{

(OUT)DSX-1 Tip1

(IN)DSX-1Tip

DSX-1Ring1(OUT)

DSX-1Ring(IN)

MUXPort

{

(OUT)DSX-1 Tip1

DSX-1Ring1(OUT)

GND

Segment3*

Management bus

-48V BAT

System alarm

Frame ground

HDSL2SpanTip

HDSL2SpanRing

Factory use only

(OUT)MATIF Tip

(IN)MATIE Tip

Fusealarm*

MATIF Ring(OUT)

Metallic Access

(TB6)

Metallic Access

{

(TB6)

14 MATIE Ring(IN)

Segment2

** Segment 3 (A - L and 1 - 10) are

from standard 3192 alphanumeric

connector pins as reflected on the

labels on the backplane of the

HMS-358 shelf.

* Fuse alarm is normally floating

and at -48 Vdc when activated.

Figure 33. H2TU-C-319 List 4E Card-Edge Connector

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LTPH-UM-1049-02, Issue 2

Appendix A - Specifications

Figure 34 shows the generic labeling of the connector as it appears on the backplane with HMS-358 shelf. Note

that the H2TU-C has no connections to Loop B of Group 1. The HMS-358 technical practice refers to Group 1

and Group 2 as Port 1 and Port 2, respectively.

AUX (Loop A) Tip 19

AUX (Loop B) Tip 20

AUX (Loop A) Ring

AUX (Loop B) Ring

Group Port 2

3192 MECH

DSX (XMT from MUX) Tip

DSX (XMT from MUX) Ring

DSX (RCV to MUX) Ring

DSX (RCV to MUX) Tip

Line (Loop A) Tip

Line (Loop B) Tip

Line (Loop A) Ring

Line (Loop B) Ring

Group Port 1

Figure 34. HMS-358 Backplane H2TU-C-319 List 4E Card Edge Connector Labeling

Network Management Control Bus

The H2TU-C provides a Network Management Control Bus on pin 7 of the card-edge connector. This allows the

various ADC Management System protocols to manage the H2TU-C through the HMU-319 HiGain Management

Unit. Whenever the H2TU-C is under management, the MNGDmessage displays periodically on the front-panel

display.

Some H2TU-C features are affected when it is under management. Consult the management unit

practice for further information.

Fuse Alarm

Pin 10 on the card-edge connector is a Fuse Alarm that is driven to -48 Vdc through a diode whenever its onboard

fuse opens. It emulates the function of the Fuse Alarm output from pin 10 on normal, high density (HD) repeaters.

pin 10 is connected to pin 5 of the 1184 Alarm Card (slot 1 in the HD shelf) and causes the 1184 Fuse ALM LED

to light when the pin 10 signal is activated. Its normally floating output must never be driven above ground or

below -80 Vdc. It can sink a current of 10 mA. The H2TU-C does not support the BPV function (pin E) of normal

HD repeaters.

H2TU-C-319 List 4E

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Appendix A - Specifications

LTPH-UM-1049-02, Issue 2

System Alarm Output Pin

Pin H on the card-edge connector, shown in Figure 33, is the H2TU-C System Alarm output pin. The following

notes apply to pin H:

•

Pin H replaces the Local Loss of Signal (LLOS) on normal high-density (3192) repeaters.

The normally floating output of pin H can connect to pin 1 of the 1184 or 3192-9F Alarm Card in position 29

of the high density (HD) shelf.

•

The H2TU-C forces pin H to +5Vdc (maximum of 10 mA) for a system alarm condition. Pin H then remains

at +5 Vdc for the duration of the alarm condition.

•

If the Wescom 1184 Alarm Card is installed in the shelf, its LOS LED lights for every MNRALM.

The H2TU-C Status LED flashes red for the duration of a system alarm condition.

Setting the ALM option to DIS only prevents the system alarm bus on pin H from being activated for a system

alarm event. The Status LED still flashes red and the ALRM message still displays.

•

“System Alarms ” on page 52 describes the system alarms that activate pin H.

Pin H must never be taken above +5 Vdc or below -60 Vdc.

January 9, 2002

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LTPH-UM-1049-02, Issue 2

Appendix A - Specifications

CRAFT PORT

Figure 35 shows the pinout for the craft port connector and its connection to a DB-9 or DB-25 connector on a

maintenance terminal.

Terminal

DB-9 Connector

(DTE)

H2TU-C-319

DB-9 Connector

(DCE)

TD (Transmit Data)

RD (Receive Data)

GND

Terminal

DB-25 Connector

(DTE)

Figure 35. RS-232 Craft Port Pinouts

H2TU-C-319 List 4E

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Appendix B - Functional Operation

LTPH-UM-1049-02, Issue 2

APPENDIX B - FUNCTIONAL OPERATION

ADC HDSL2 technology provides full-duplex services at standard DS1 rates over copper wires between an

H2TU-C and an H2TU-R, which comprise one HiGain HDSL2 system. HiGain HDSL2 systems use ADC

Overlapped Pulse Amplitude Modulation (PAM) Transmission with Interlocking Spectra (OPTIS) transceiver

systems to establish full-duplex, 1.552 kbps data channels between the H2TU-C and a remotely located H2TU-R.

Figure 36 shows a block diagram of the H2TU-C. The H2TU-C receives a 1.544 Mbps DSX-1 data stream from

the DSX-1 digital cross connect interface. The H2TU-C contains a DS1 frame synchronizer controlled by an 8-bit

microprocessor that determines the type of framing on the DS1 stream and synchronizes to it. The H2TU-C

recognizes Superframe (SF), including D4, or Extended Superframe (ESF) framing.

H2TU-C-319, L4E

LOS

r^(a)

OUT

AIS

User option

Mode SEL

(ACO)

ADS1

Option

control

I/O

HMU control

Micro

HDSL2 SPAN

Payload

Status RS-232

^INT

M S

U X

(MUX)

MONF

MONE

OUT

r^(a)

Frame GND J

LOS Alarm Bus H

-48 V BATT. 8

GND 5

(a) Depends on setting of the ADS1 option

Fuse Alarm 10

M = MUX or SPTF

A = Auxiliary

C = CTHR (Cut-through) or SPTE

MONF = Monitor Facilities

MONE = Monitor Equipment

SPTF = Split Facilities

SPTE = Split Equipment

Figure 36. H2TU-C-319 List 4E Block Diagram

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H2TU-C-319 List 4E

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LTPH-UM-1049-02, Issue 2

Appendix B - Functional Operation

TIMING

The low loop wander (0.3 UI max) of an H2TU-C, when used with compatible regenerators and remote units,

allows the circuit to be used in all critical timing applications, including those that are used to transport Stratum 1

timing.

GROUND FAULT DETECT

The H2TU-C has a Ground Fault Detect (GFD) circuit which detects a ground or a resistive path to ground on any

wire of the HDSL2 loop. This makes the product compliant with the Class A2 requirements of GR-1089.

H2TU-C-319 List 4E

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Appendix C - Compatibility

LTPH-UM-1049-02, Issue 2

APPENDIX C - COMPATIBILITY

The HiGain HDSL2 system uses HDSL2 transmission technology as recommended by ANSI committee in

compliance with the August 1999 T1-E1.4/99-006R5 HDSL2 standards.

The H2TU-C are designed to mount in the following shelves with 3192 mechanics:

•

ADC HMS-317 (28-slot, 23-inch shelf)

ADC HHS-319 (3-slot, 19-inch horizontal shelf)

ADC HMS-308 (8-slot remote enclosure)

Charles Ind. #3192 (28-slot connectorized)

Charles Ind. #3192-WR (28-slot wire wrap)

Charles Ind. #343-00 (12- to 14-slot wire wrap)

Charles Ind. #319-02 (22-slot connectorized)

Charles Ind. #319-04 (22-slot wire wrap)

Charles Ind. #340-00 (9-slot to 11-slot wire wrap)

Larus #1185 (28-slot connectorized)

Charles Ind. 343-00 and 340-00 shelves do not support the H2TU-C System Alarm output on

pin H. Also, if slots 1 and 2 of these shelves were wired for the 3408 Fault Locate unit, they must

be rewired to accept the H2TU-C.

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LTPH-UM-1049-02, Issue 2

Appendix D - Product Support

APPENDIX D - PRODUCT SUPPORT

ADC Customer Service Group provides expert pre-sales and post-sales support and training for all its products.

TECHNICAL SUPPORT

Technical support is available 24 hours a day, 7 days a week by contacting the ADC Technical Assistance Center

(TAC) at one of the following numbers:

•

Telephone: 800.638.0031

714.730.3222

The 800 line is toll-free in the USA and Canada.

•

Fax:

714.730.2400

Email:

Online:

[email protected]

www.adc.com/knowledge_base_frames

RETURNS

To return equipment to ADC:

Locate the purchase order number under which the equipment was purchased. You will need to provide this

number to ADC Customer Service to obtain a return authorization.

Call ADC Customer Service to ask for a Return Material Authorization (RMA) number and instructions

before returning products. Use the telephone number, fax number, or email address listed below:

•

Telephone: 800.366.3891 ext. 73748 or 952.917.3748

The 800 line is toll-free in the USA and Canada.

Fax: 952.917.3237

•

Email Address: repair&[email protected]

Be prepared to provide the following information:

•

Company name, address, telephone number, and the name of a person Customer Service can contact

regarding this equipment.

•

A description of the equipment as well as the number of units that you are returning. Be sure to include

the model and part number of each unit.

•

The shipping address to which Customer Service should return the repaired equipment.

The reason for the return.

H2TU-C-319 List 4E

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Appendix E - Abbreviations

LTPH-UM-1049-02, Issue 2

APPENDIX E - ABBREVIATIONS

ES-P: Errored Seconds-Path

EXZ: The occurrence of 8 consecutive zeroes for B8ZS or 16

ACO: Alarm Cutoff

ACON: Auto Conversion of DS1 frame

ACQ: Acquisition

ADSI: Active DSX-1

for AMI

FCON: Framed Conversion of DS1 frame

FERR: Framing Bit Error

FLDL: Flash Download

AIS:

Alarm Indication Signal

ALRM: Alarm Condition

AMI: Alternate Mark Inversion

AUX: Auxiliary

AWG: American Wire Gauge

GFD: Ground Fault Detect

B8ZS: Bipolar with 8-Zero Substitution

BER: Bit Error Rate

BPVT: Bipolar Violation Transparency

BRG: Bridge

H2TU-R: HiGain HDSL2 Remote Unit

HBER: HDSL2 Block Error Rate

HCDS: High Capacity Digital Service

ID:

Identification

CLEI: Common Language Equipment Identifier

CLOC: Customer Local Loopback

CO:

Central Office

LA:

Loop Attenuation

CREM: Customer Remote Loopback

CSA: Carrier Service Area

CTHR: Cut-through

LAIS: Line Alarm Indication Signal

LATT: Loop Attenuation

LED: Light Emitting Diode

LIU:

Line Interface Units

LLOS: Local Loss of Signal

LOS: Loss of Signal

DBER: DS1 Bit Error Rate

DDS: Digital Data Service

DLC: Digital Loop Carrier

DSX-1: DS1 Cross-Connect Frame

LOSW: Loss of Sync Word

LPF: Line Power Feed

LRAI: Remote Alarm Indicator

ECI:

ES:

Equipment Catalog Item

Errored Seconds

MAL: Margin Alarm

MONE: Monitor Equipment

MONF: Monitor Facilities

MSEC: Monitored Seconds

MTA: Metallic Test Access

ESD: Electrostatic Discharge

ESF: Extended SuperFrame

ES-L: Errored Seconds-Line

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H2TU-C-319 List 4E

LTPH-UM-1049-02, Issue 2

Appendix E - Abbreviations

MTAE: Metallic Test Access Equipment

MTAF: Metallic Test Access Facilities

MUX: Multiplexer

TUC: Transmission Unit Central Office

TUR: Transmission Unit Remote End

UAS: Unavailable Errored Seconds

UNFR: Unframed

NLOC: Network Local Loopback

NMA: Network Management and Administration

NPRM: Network PRM

UUT: Unit Under Test

NREM: Network Remote Loopback

OPTIS: Overlapped PAM Transmission with Interlocking Spectra

PAM: Pulse Amplitude Modulation

PRM: Performance Report Messaging

PRMF: Performance Report Messaging - Far End

PRM-FE: Performance Report Messaging - Far End

PRMN: Performance Report Messaging - Near End

PRM-NE: Performance Report Messaging - Near End

RAIS: Remote Alarm Indication Signal

RLOS: Remote Loss of Signal

RRAI: Remote Alarm Indication

SES: Severely Errored Seconds

SES-L: Severely Errored Seconds - Line

SES-P: Severely Errored Seconds - Path

SF:

SuperFrame

SMJK: SmartJack Loopback

SPNn: Span Number

SPRM: Supplemental PRM

SPTE: Split Equipment

SPTF: Split Facilities

TRCI: TX RAI-CI Indication - Customer Installation

H2TU-C-319 List 4E

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Appendix E - Abbreviations

LTPH-UM-1049-02, Issue 2

January 9, 2002

H2TU-C-319 List 4E

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CERTIFICATION AND WARRANTY

FCC CLASS A COMPLIANCE

This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These

limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial

environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the

instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to

cause harmful interference in which case the user will be required to correct the interference at his own expense.

LIMITED WARRANTY

ADC DSL Systems, Incorporated (“ADC”) warrants that, for a period of sixty (60) months from the date of shipment, the hardware portion

of its products will be free of material defects and faulty workmanship under normal use. ADC's obligation, under this warranty, is limited to

replacing or repairing, at ADC's option, any such hardware product which is returned during the 60-month warranty period per ADC's

instructions and which product is confirmed by ADC not to comply with the foregoing warranty.

ADC warrants that, for a period of 90 days from the date of purchase, the software furnished with its products will operate substantially in

accordance with the ADC published specifications and documentation for such software. ADC’s entire liability for software that does not

comply with the foregoing warranty and is reported to ADC during the 90-day warranty period is, at ADC’s option, either (a) return of the

price paid or (b) repair or replace of the software. ADC also warrants that, for a period of thirty (30) days from the date of purchase, the media

on which software is stored will be free from material defects under normal use. ADC will replace defective media at no charge if it is returned

to ADC during the 30-day warranty period along with proof of the date of shipment.

The transportation charges for shipment of returned products to ADC will be prepaid by the Buyer. ADC will pay transportation charges for

shipment of replacement products to Buyer, unless no trouble is found (NTF), in which case the Buyer will pay transportation charges.

ADC may use reconditioned parts for such repair or replacement. This warranty does not apply to any product which has been repaired, worked

upon, or altered by persons not authorized by ADC or in ADC's sole judgment has been subjected to misuse, accident, fire or other casualty,

or operation beyond its design range.

Repaired products have a 90-day warranty, or until the end of the original warranty period—whichever period is greater.

ADC DISCLAIMS ALL OTHER WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO IMPLIED

WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, WITH RESPECT TO ITS PRODUCTS

AND ANY ACCOMPANYING WRITTEN MATERIALS. FURTHER, ADC DOES NOT WARRANT THAT SOFTWARE WILL BE

FREE FROM BUGS OR THAT ITS USE WILL BE UNINTERRUPTED OR REGARDING THE USE, OR THE RESULTS OF THE USE,

OF THE SOFTWARE IN TERMS OF CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.

MODIFICATIONS

Any changes or modifications made to this device that are not expressly approved by ADC DSL Systems, Inc. voids the user's warranty.

All wiring external to the products should follow the provisions of the current edition of the National Electrical Code.

SAFETY STANDARDS COMPLIANCE

The equipment has been tested and verified to comply with the applicable sections of the following standards:

•

GR 63-CORE - Network Equipment-Building System (NEBS) Requirements

GR 1089-CORE - Electromagnetic Compatibility and Electrical Safety

Binational standard, UL-1950/CSA-C22.2 No. 950-95: Safety of Information Technology Equipment

For technical assistance, refer to “Appendix D - Product Support ” on page 75.

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ADC DSL Systems, Inc.

14402 Franklin Avenue

Tustin, CA 92780-7013

Tel: 714.832.9922

Fax: 714.832.9924

Technical Assistance

Tel: 800.638.0031

Tel: 714.730.3222

Fax: 714.730.2400

ISO 9001/TL 9000

DOCUMENT: LTPH-UM-1049-02, ISSUE 2

´,-Q¶6o¨

DNV Certification, Inc.

REGISTERED FIRM

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