ADC Network Card H4TU C 319 List 1 Line Unit User Manual

1. H4TU-C-319 List 1 Front Panel......................................................................................................................3

2. Installing the H4TU-C-319 List 1 into a Shelf................................................................................................8

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

4. Config Menu - Date and Time.......................................................................................................................15

5. Inventory Screen............................................................................................................................................16

6. Config Menu..................................................................................................................................................17

7. Config Menu - Standard Options (defaults shown).......................................................................................18

8. Config Menu - ADC Options (defaults shown) ............................................................................................18

9. Config Menu - Set Factory Defaults .............................................................................................................23

10. Config Menu - Master Clear..........................................................................................................................24

11. System Spans.................................................................................................................................................25

12. Monitor Screen - Active Loopback with Alarms ..........................................................................................26

13. H4TU-R DS1 31-Day Performance History .................................................................................................28

14. H4TU-C DS1 25-Hour Performance History................................................................................................29

15. H4TU-C DS1 48-Hour Performance History................................................................................................29

16. H4TU-R DS1 Current Statistic s....................................................................................................................30

17. H4TU-C DS1 Current Statistic s....................................................................................................................30

18. H4TU-C HDSL (Loop 1/Loop 2) 31-Day Performance History ..................................................................32

19. H4TU-C HDSL (Loop 1/Loop 2) 48-Hour Performance History.................................................................32

20. H4TU-C HDSL (Loop 1/Loop 2) 25-Hour Performance History.................................................................33

21. H4TU-C HDSL (Loop 1/Loop 2) Current Statistic s.....................................................................................33

22. H4TU-C DS1 Alarm History Screen.............................................................................................................35

23. H4TU-R DS1 Alarm History Screen.............................................................................................................36

24. H4TU-C HDSL Alarm History Screen .........................................................................................................37

25. System Event Log..........................................................................................................................................38

26. Report Menu - Full Report ............................................................................................................................40

27. H4TU-R LOS and AIS Response Prioritie s..................................................................................................45

28. Loopback Summary.......................................................................................................................................46

29. Loopback Modes ...........................................................................................................................................50

30. H4TU-C BERT Generator Screen.................................................................................................................56

31. H4TU-R BERT Generator Screen.................................................................................................................57

32. H4TU-C-319 Card-Edge Connector..............................................................................................................62

33. RS-232 Craft Port Pinout s.............................................................................................................................63

34. H4TU-C-319 List 1 Block Diagram..............................................................................................................64

H4TU-C-319 List 1

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List of Tables

LTPH-UM-1031-03, Issue 3

LIST OF TABLES

1. Front-Panel Descriptio n.................................................................................................................................. 4

2. Front-Panel Display Messages........................................................................................................................ 5

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

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

5. H4TU-C-319 List 1 Standard Config Menu Options ................................................................................... 19

6. H4TU-C-319 List 1 ADC Config Menu Options ......................................................................................... 20

7. DS1/DSX-1 24-Hour PM Threshold ............................................................................................................ 22

8. Monitor Screen Descriptions ........................................................................................................................ 26

9. Acronyms Used on the DS1 Performance History Screens.......................................................................... 31

10. Acronyms Used on the HDSL4 Performance History Screens .................................................................... 34

11. DS1 Alarm Description s............................................................................................................................... 36

12. HDSL4 Alarm Descriptions.......................................................................................................................... 37

13. Event Log Entry Messages Lis t.................................................................................................................... 39

14. Report Types................................................................................................................................................. 41

15. Front-Panel System Alarm s.......................................................................................................................... 42

16. Summary of HDSL4 Loopback and Activation Codes ................................................................................ 51

17. A3LB Addressable Repeater Loopback Commands .................................................................................... 52

18. A5LB Addressable Repeater Loopback Commands .................................................................................... 53

19. BERT Signal Generator Option Setting s...................................................................................................... 56

20. H4TU-C Power Parameters .......................................................................................................................... 60

21. HDSL4 Reach Chart ..................................................................................................................................... 61

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LTPH-UM-1031-03, Issue 3

Overview

OVERVIEW

The H4TU-C-319 List 1 is the Central Office (CO) side of a T1 transmission system. The ADC^®four-wire HDSL2

product family (hereafter referred to as “HDSL4”) is based on the HDSL4 standard ANSI T1.418 Issue 2.

The H4TU-C, when used with an H4TU-R remote unit, transmits a 1.544 Mbps payload up to a maximum distance

of 12 kft. over two unconditioned copper pairs. Using two doublers (H4Ds), the Carrier Service Area (CSA) reach

can be extended to a maximum of 34 kft. The H4TU-C-319 List 1 is designed to mount in 3192 mechanics shelves.

For a list of compatible shelves see “Appendix C - Compatibility” on page 65.

The H4TU-C-319 List 1 complies with the protection switching features of the PSC-606 List 1

protection switching card. See the PSC-606 List 1 technical practice, document number

LTPH-TP-1006-xx for detailed information.

FEATURES

Standard features include:

•

HDSL4 transmission features

—

Lightning and power cross-protection on HDSL4 interfaces

Full-duplex HDSL4 transmission on four wire at 1.568 Mbps

Ultra-low wander (Stratum 1 compliant)

Grounded loop detection on either HDSL4 spans

Spectrum compatibility with Asymmetric Digital Subscriber Line (ADSL) services

Bit Error Rate Tester (BERT)

Three-span range with two doublers (34 kft, 26 AWG)

•

Front-panel provisioning features

—

Four-character status display

DS1 splitting and bridging access

Status Light Emitting Diode (LED)

RS-232 craft port for connection to a maintenance terminal

MODE and SEL pushbuttons

Front-panel dual loopback commands

•

Maintenance screens for inventory, provisioning, and troubleshooting

—

DS1 and HDSL4 performance monitoring

DS1 and HDSL4 alarm histories

Payload (PL) and HDSL Generic (HG) loopback source identification

Margin Alarm (MAL) threshold

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

Sources sealing current when connected to any locally powered H4TU-R-402

Remote access and control of H4TU-R test signal generator

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Overview

LTPH-UM-1031-03, Issue 3

•

Both doubler and non-doubler applications are compatible with ADSL services in same binder group

Configuration options

—

Selectable DSX-1 pre-equalizer

Bipolar Violation Transparency (BPVT)

Bit Error Rate (BER) alarm

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

HDSL4 transmit power levels

—

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

Remote provisioning

Concurrent detection of all loopback activation codes

•

Additional Loopback Timeout (LBTO) settings of 8 hours and 24 hours

Network Management and Administration (NMA) interface

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

line unit’s DSX-1 interface.

APPLICATIONS

HDSL4 systems provide a cost-effective, easy-to-deploy method for delivering T1 High Capacity Digital Service

(HCDS) over two pair of wires. HDSL4 systems support a multitude of network connections.

•

The service is deployed over two unconditioned, non-loaded copper pair at 784 kps per loop.

Conventional, inline DS1 repeaters are no longer required.

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

For Span 1, each loop has no more than 47 dB of insertion loss (INSL) at 196 kHz, with driving and terminating

impedances of 135Ω; for Span 2 and Span 3, each loop has no more than 43 dB of insertion loss at 196 kHz. In

general, HDSL4 systems:

•

Operate effectively in the same cable binder group with other HDSL4 lines, HDSL, T1, ADSL, SDSL, POTS,

Digital Data Service (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-1031-03, Issue 3

Front Panel

FRONT PANEL

Figure 1 shows the H4TU-C-319 List 1 front panel. Table 1 on page 4 describes the front-panel components. For

a list of front-panel display messages, refer to Table 2 on page 5. For pinout diagrams of the H4TU-C card-edge

connector and craft port, refer to Figure 32 on page 62 and Figure 33 on page 63, respectively.

Front-panel display

List number

MODE and SEL pushbuttons

SETUP

Status LED

STATUS

Card handle

(CLEI and ECI bar code

label on outside of handle)

DSX-1 access jacks

N L

Craft port

DCE

Figure 1. H4TU-C-319 List 1 Front Panel

H4TU-C-319 List 1

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Front Panel

LTPH-UM-1031-03, Issue 3

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 SEL 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.

List number

Identifies the list number of the H4TU-C-319.

MODE and SEL pushbuttons

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

Used to initiate all HDSL4 loopbacks and to display DSX-1 line parameters and line unit identity.

Status LED

Off

The status LED can report the following conditions:

Line power is off.

Green

Normal operation.

Red

Fuse alarm.

Flashing red

Yellow

HDSL4 acquisition or system alarm.

An H4TU-C-319 Customer Remote Loopback (CREM) or a Network Local Loopback (NLOC) is in

effect.

Flashing yellow

Card handle

H4TU-C-319 is in an Armed (ARM) state.

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

the Equipment Catalog Item (ECI) bar code number.

DSX-1 access jacks

BRG

Provides non-intrusive bridging jack access to (IN) and from (OUT) the HDSL4 span at the DSX-1

interface. Allows the two DS1 payloads to be monitored.

LINE

Provides splitting jack access to (IN) and from (OUT) the HDSL4 span at the 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.

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LTPH-UM-1031-03, Issue 3

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 Cutoff

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

condition by pressing the SEL pushbutton on the H4TU-C front panel.

ALRM

Alarm Condition Exists

DS1 Bit Error Rate

A system alarm condition is in effect.

DBER

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

DU1U or DU1D

Doubler 1 Upstream or Downstream Precedes LA, HBR, and MAL and indicates the first H4D doubler HDSL4

Port upstream or downstream interface.

DU2U or DU2D

HBRx

Doubler 2 Upstream or Downstream Precedes LA, HBR, and MAL and indicates the second H4D doubler

Port

HDSL4 upstream or downstream interface.

HDSL4 Block Error Rate Loop 1 or

Loop 2

A system HDSL4 Block Error Rate alarm is in effect. (x indicates

Loop 1 or Loop 2.)

LAx

Loop Attenuation Loop 1 or Loop 2 The attenuation on the HDSL4 loop has exceeded the maximum

threshold value. (x indicates Loop 1 or Loop 2.)

LAIS

Line Alarm Indication Signal

Line (Unit) Loss of Signal

Loss of Frame

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

transmitted at the H4TU-C DS1 input or output ports.

LLOS

Indicates that no signal is detected at the DSX-1 input to the H4TU-C.

Causes a system alarm.

LOF

The DS1 input does not contain the ESF or SF frame pattern setting of

the FRMG option.

LOSW

LRAI

Loss of Sync Word

Line RAI

Indicates that one of the HDSL4 loops has lost synchronization.

Indicates an RAI alarm (yellow) from the CPE with an error-free signal

from the line unit or network. RAI signal is transmitted towards the

network.

MALx

Margin Alarm Loop 1 or Loop 2

The margin at Loop 1 or Loop 2 of the HDSL4 interface has dropped

below the threshold (0 to 15 dB) set by the operator. (x indicates

Loop 1 or Loop 2.)

PWR FEED GND

PWR FEED OPEN

PWR FEED SHRT

PRMF

Power Feed Ground

Power Feed Open

Power Feed Short

The HDSL4 loop is grounded.

Indicates a line power open condition.

Indicates a short between Loop 1 and Loop 2 of the HDSL4 pair.

H4TU-R PRM-FE BER threshold has been exceeded at far end.

Performance Report Messaging -

Far End

PRMN

RAIS

Performance Report Messaging -

Near End

H4TU-R PRM-NE BER threshold has been exceeded at near end.

Remote Alarm Indication Signal

Remote (Unit) Loss of Signal

Remote RAI—Remote Alarm

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

transmitted at the H4TU-R DS1 input or output ports.

RLOS

RRAI

Indicates that no signal is detected at the DS1 input to the H4TU-R.

Causes a system alarm.

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

Indication at the H4TU-R (Net signal unit or network. RAI-CI signal is transmitted towards the network.

has errors.)

SPNn

TUC

Span Number

Accompanies the LOSW alarm and identifies the span where the LOSW

alarm occurred.

Transmission Unit Central Office

Transmission Unit Remote End

Precedes DBER, HBR, MAL, LA, and LOF alarms and indicates that the

alarm has occurred at the H4TU-C Central Office unit.

TUR

Precedes DBER, HBR, MAL, LA, and LOF alarms and indicates that the

alarm has occurred at the H4TU-R remote unit.

Continued

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Front Panel

LTPH-UM-1031-03, Issue 3

Table 2. Front-Panel Display Messages (Continued)

Message

Full Name

Description

LOOPBACK MESSAGES

CDU1

Customer Doubler 1 Loopback

DS1 signal from customer is looped back to the customer at H4D1

(111100).

CDU2

Customer Doubler 2 Loopback

DS1 signal from customer is looped back to the customer at H4D2

(111110).

CLOC

COLB

CREM

Customer Local Loopback

Central Office Loopback

Customer Remote Loopback

DS1 signal from customer is looped back to the customer at the H4TU-R.

Dual loopback at the H4TU-C.

DS1 signal from customer is looped back to the customer at the

H4TU-C.

NDU1

NDU2

NLOC

NREM

RULB

SMJK

Network Doubler 1 Loopback

Network Doubler 2 Loopback

Network Local Loopback

Network Remote Loopback

Remote Unit Loopback

Signal is looped back to the network at H4D1 (110000).

Signal is looped back to the network at H4D2 (111000).

DSX-1 signal is looped back to the network at the H4TU-C.

DSX-1 signal is looped back to the network at the H4TU-R.

Dual loopback at the H4TU-R.

Remote SmartJack Loopback

DSX-1 signal is looped back to the network at the H4TU-R SmartJack

module.

DIAGNOSTIC MESSAGES

A=xx

Maximum Loop Attenuation

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

highest loop attenuation of all HDSL interfaces.

ACQ1 or ACQ2

Acquisition 1 or Acquisition 2

The multiplexers of the H4TU-C and H4TU-R are trying to establish

synchronization over HDSL4 Loop 1 or Loop 2.

ARM

System Armed

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

BAD RT?

No Response from H4TU-R

The H4TU-C receives no response from the H4TU-R, and all HDSL4

loop conditions are normal; therefore, the integrity of the H4TU-R or

the HDSL4 loops is questionable.

FERR

Framing Bit Error Occurred

Framing bit error occurred at H4TU-C DSX-1 input.

HxES

HDSL4 CRC Error Loop 1 or Loop 2 H4TU-C HDSL4 Loop 1 or Loop 2 Cyclical Redundancy Check (CRC)

error. (Loop 1 has display priority over Loop 2.)

LBPV

Local Bipolar Violation

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

H4TU-C-319.

1=xx or 2=xx

HDSL4 Loop Margin

Indicates the power of the received HDSL4 signal on each loop relative

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

adequate for reliable system operation. (xx denotes lowest margin in

dB for Loop 1 and Loop 2.)

MNGD

Managed

The H4TU-C-319 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

HDSL4 span power has been turned off by setting the PWRF option to

OFF, or HDSL4 span power has been turned off by use of the A5LB

Intelligent Office Repeater (IOR) powerdown code.

PWR FEED ON

SIG1 or SIG2

Power Feed On

Signaling

Indicates that the HDSL4 loop power is applied and neither pair is

grounded.

The transceivers of the H4TU-C and H4TU-R are trying to establish

contact with each other over HDSL4 on Loop 1 or Loop 2.

SYSTEM INFORMATION MESSAGES ^(a)

VER x.xx

LIST xx

Software Version Number

List Number

The software version number of the H4TU-C-319.

The list number of the H4TU-C-319.

Continued

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LTPH-UM-1031-03, Issue 3

Front Panel

Table 2. Front-Panel Display Messages (Continued)

Message

Full Name

Description

FRM xxxx

Frame: SF, ESF, UNFR

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

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

CODE xxxx

Line Code: AMI, B8ZS

The line code that the H4TU-C is receiving at its DSX-1 interface, if the

DS1 option is set to AUTO. Otherwise, it mimics either of the other two

DS1 line codes: Alternate Mark Inversion (AMI) or Bipolar with 8-Zero

Substitution (B8ZS).

LATT xx

Loop Attenuation

Margin

The current loop attenuation threshold setting measured in dB.

The current margin threshold setting measured in dB.

MARG xx

(a) System information messages scroll in the order listed. To scroll through the messages, press the MODE pushbutton for 3 or

more seconds. After system information messages scroll, the front panel displays the line card options (see Table 5 on

page 19 and Table 6 on page 20).

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Installation

LTPH-UM-1031-03, Issue 3

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.

H4TU-C-319

CO shelf

Figure 2. Installing the H4TU-C-319 List 1 into a Shelf

When installing an H4TU-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 H4TU-C DSX-1 output ports to the

cross-connect panel must be grounded at both ends.

Align the H4TU-C with the enclosure slot guides, then push the unit in until it touches the backplane

card-edge connector.

Place your thumbs on the front panel and push the H4TU-C into the slot guides until properly seated.

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LTPH-UM-1031-03, Issue 3

Installation

VERIFICATION

Once the H4TU-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 (see Table 2 on page 5)

Verification without a Downstream Device

If there is no downstream device installed:

Verify that the H4TU-C powers up. The front-panel display illuminates and reports status messages. (See

Table 2 on page 5 for a list of messages.)

Verify that the H4TU-C attempts to communicate with downstream devices (status LED flashes red). Even

if a downstream device is not present, the following events should occur:

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

The H4TU-C again attempts communication until a downstream device is detected.

Verification with a Downstream Device

If a downstream device has been installed:

Verify that the H4TU-C powers up. (The front-panel display illuminates and reports various status messages.)

Verify that the H4TU-C attempts to communicate with downstream devices (status LED flashes red). One of

the following occurs:

•

If downstream devices are successfully identified and the HDSL4 loop synchronizes, the H4TU-C status

LED lights steady green. The H4TU-C reports normal margin and loop attenuation messages on the

front-panel display.

•

If downstream devices are not successfully identified, the H4TU-C reports four-character status

messages. The H4TU-C attempts communication again and reports four-character status messages. The

H4TU-C repeats this cycle until a downstream device is detected.

If there is more than one span, verify that each subsequent span synchronizes normally by monitoring the

front-panel display messages.

If a remote unit is installed, verify that the last span synchronizes normally. The H4TU-C status LED should

light a steady green and the front-panel display should report normal margin messages.

Verify that a valid DS1 signal has been applied to the H4TU-C and the H4TU-R.

•

If no DS1 signal is being applied to either the H4TU-C or the H4TU-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 H4TU-C and H4TU-R, then DS1 alarm indications should

be absent and the status LED should be steady green.

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Provisioning

LTPH-UM-1031-03, Issue 3

PROVISIONING

There are two methods for provisioning:

•

Use the MODE and SEL pushbuttons on the front panel of the H4TU-C to:

—

Set system options

Reset the H4TU-C to its factory default settings for system options

Display system option settings (scroll mode)

Select system loopbacks

•

Use a maintenance terminal (ASCII terminal or a PC running terminal emulation software) connected to the

H4TU-C craft port (or to an HMU craft port) to access the maintenance screens (Figure 3 on page 13). This

gives you full access to all H4TU-C status, history, inventory, and provisioning screens.

The MNGD message displays if the H4TU-C-319 is under HMU management. When this occurs,

the front-panel pushbuttons and craft port are disabled.

No dip switches or jumpers are required to provision the H4TU-C-319 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 the H4TU-C-319 is unplugged.

USING THE MODE AND SEL PUSHBUTTONS

Setting Options through MODE and SEL

To provision the H4TU-C-319 through the MODE and SEL 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 SEL pushbutton to step through all possible settings of the selected parameter. (See Table 5 on

page 19 and Table 6 on page 20.)

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 SEL pushbutton. (A CONFYESmessage appears,

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

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LTPH-UM-1031-03, Issue 3

Provisioning

Resetting to Factory Default

All user options for the H4TU-C-319 List 1 (Table 5 on page 19) can be set to the factory default values using the

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

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

DFLT NO

Press the SEL pushbutton while 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 H4TU-C-319 displays the following parameters:

•

Software version number

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 SEL pushbutton on the H4TU-C-319 front panel for less than 3

seconds. This executes an ACO and returns the H4TU-C-319 to its non-alarm state. For more information about

alarms, see “System Alarms” on page 42.

Loopback Modes

See “Loopback Operation” on page 46 for instructions on using the MODE and SEL pushbuttons to activate

loopbacks.

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Provisioning

LTPH-UM-1031-03, Issue 3

USING A MAINTENANCE TERMINAL

Connecting to a Maintenance Terminal

The craft port on the front panel allows you to connect the H4TU-C-319 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 (Figure 1 on page 3) on the

H4TU-C-319 List 1 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 (emulating 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 HDSL4 logon screen.

Logon Screen

The maintenance terminal screens allow you to monitor, provision, and troubleshoot an HDSL4 system.

To select a menu from the logon screen (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 Maintenance Terminal Screens

Key ^(a)

Function

SPACEBAR

ENTER

Cycle through selections.

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

ESC or F11 (VT100 only) 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 use of control keys instead of arrow keys.

September 12, 2003

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LTPH-UM-1031-03, Issue 3

Provisioning

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

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

Menu bar

Monitor Performance Event Log Config Inventory Report Rlogon

Help

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

ADC DSL Systems, Inc.

HDSL4

Voice: 800.638.0031

Fax : 714.730.2400

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

ID: xxxx--xxxx--xxxx—-xxxx

02/01/2002 12:30:01

H4TU-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, 25-hour, 48-hour,

or 31-day periods for either the DS1 or HDSL4 interface.

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

time of occurrence.

Provides standard configuration options, ADC options, BER tester

(BERT), 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. Selecting the Config menu after a remote logon displays

the BERT Generator menu, which provides access to the BERT Signal

Generator configuration submenu.

Inventory

Report

Provides product information about the various devices that are in the

system and lists circuit and device identifications.

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

Information Report, and Event Report.

Continued

H4TU-C-319 List 1

September 12, 2003

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LTPH-UM-1031-03, Issue 3

Table 4. Logon Screen Menus (Continued)

Press this key:

To access this menu:

Rlogon / Rlogout

Menu Functions

Remote logon can be performed from the H4TU-C or the H4TU-R. The

screen displays “Rlogout” when the H4TU-C or H4TU-R is remotely

logged on to the other unit at the end of the circuit.

Remote logon from the H4TU-C will permit viewing of the H4TU-R BERT

Generator configuration submenu.

To log off the remote unit, press R . “Rlogout” changes to “Rlogon.” The

unit is now locally logged on until R is pressed again to reinitiate a

remote logon.

Help

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

navigational keys, print guide, and ADC contact information.

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H4TU-C-319 List 1

LTPH-UM-1031-03, Issue 3

Provisioning

PROVISIONING TASKS

After the H4TU-C-319 is successfully installed, perform these basic provisioning tasks:

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

Set the circuit ID numbers (see “Setting Circuit ID Numbers” on page 16).

Make any desired changes to configuration (see “Configuring the System” on page 17).

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

History, Alarm, and Event Log Screens” on page 24).

Setting Date and Time

Monitor Performance Event Log Config Inventory Report Rlogon

Help

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

| Standard Options -> |

| ADC Options

| BERT Generator

| Date and Time

-> |

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

| Date (mm/dd/yyyy): 02/01/2002|

| Time (hh:mm[:ss]): 12:30:01

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

ID: xxxx--xxxx—-xxxx--xxxx

02/01/2002 12:30:01

H4TU-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 .

H4TU-C-319 List 1

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LTPH-UM-1031-03, Issue 3

Setting Circuit ID Numbers

The Inventory screen 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

: H4TU-C

H4TU-R

H4TU-R-402

H4DU-1

H4D-409

H4DU-2

H4D-409

Product : H4TU-C-319

List

: 1

Sw Ver

: 4.00

4.00

Build # : 08

Checksum : 0xA015

H4 Xcvr : GSPN B165

Serial # : 215689543

0xA015

GSPN B165

215610839

VAR1EADAAA

7/27/01

0x633C

GSPN B165

123456789012

ABCDEFGHIJ

11/21/2001

GSPN B165

123456789012

1234567890

11/20/2001

CLEI

: VACJNUNEAA

Mfg. Date: 9/12/01

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

Circuit ID

H4TU-R ID

: xxxx—-xxxx—-xxxx—-xxxx

: yyyy—-yyyy—-yyyy—-yyyy

Circuit Notes:

ID: xxxx--xxxx—-xxxx—-xxxx

02/01/2002 12:30:01

H4TU-C

System: OK___

Figure 5. Inventory Screen

Press I to select the Inventory screen.

Type the Circuit ID number, then press ENTER . (The Circuit ID number may consist of up to 24 alphanumeric

characters.)

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

Type any relevant circuit notes, and then press ENTER .

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LTPH-UM-1031-03, Issue 3

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Configuring the System

The Config menu (Figure 6) allows you to make the following types of system configuration changes:

•

Standard options (Figure 7 on page 18)

ADC options (Figure 8 on page 18)

BERT Generator (Figure 30 on page 56)

Date and time (see “Setting Date and Time” on page 15)

Master clear (see “Clearing the History, Alarm, and Event Log Screens” on page 24)

Reset to factory default configuration (Figure 9 on page 23)

Monitor Performance Event Log Config Inventory Report Rlogon

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

Help

| Standard Options -> |

| ADC Options

-> |

| BERT Generator

| Date and Time

| Master Clear

| Set Factory Defaults |

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

ID: xxxx--xxxx—-xxxx--xxxx

02/01/2002 12:30:01

H4TU-C

System: OK___

Figure 6. Config Menu

Making Changes to Standard and ADC Options

Figure 7 and Figure 8 on page 18 show the Standard and ADC configuration options. Standard options are

supported by HDSL4 units when connected to units from other vendors. ADC options are an extended set of

options available only when using ADC units exclusively. For a description of each option and a list of possible

option settings, refer to Table 5 on page 19 and Table 6 on page 20. 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.

The message May need to change MUX option after changing this option

appears when changing the DS1 Line Coding (DS1) or H4TU-C Equalization (EQL) option in the

Standard Options configuration screen. (This applies when the H4TU-C is used in a

Wideband 3190 which contains a multiplexer.)

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LTPH-UM-1031-03, Issue 3

Monitor Performance Event Log Config Inventory Report Rlogon

Help

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

| Standard Options -> |

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

| Loopback Timeout (LBTO) : 60 min |

| Loop Attenuation Threshold (LATT) [0-50]: 38 dB

| Margin Threshold (MARG)

| DS1 Frame Formatting (FRMG)

| DS1 Line coding (DS1)

| H4TU-C Equalization (EQL)

| H4TU-R Line Buildout (RLBO)

| Alarm Pattern (ALMP)

| H4TU-R TLOS Loopback (TLOS)

| Network Loopback Pattern (NLBP)

| Power Back Off Network (PBON)

| Power Back Off Customer (PBOC)

[0-15]: 4 dB

: AUTO

: 0 ft

: 0 dB

: AIS

: DIS

: AIS

: DEF

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

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

ID: xxxx—-xxxx—-xxxx--xxxx

02/01/2002 12:30:01

H4TU-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)

| Remote Provisioning (RTPV)

: AUTO |

: ENA |

| Bipolar Violation Transparency (BPVT) : DIS |

| DS1 BER (DBER)

: DIS |

: NONE |

: ENA |

: DIS |

: ENA |

| HDSL4 BER Threshold (HBER)

| SmartJack Loopback (LPBK)

| Minor Alarm (ALM)

| Remote Disconnect Alarm (RDA)

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

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

ID: xxxx—-xxxx—-xxxx--xxxx

02/01/2002 12:30:01

H4TU-C

System: OK___

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

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LTPH-UM-1031-03, Issue 3

Provisioning

Table 5 describes the Standard Config menu options and lists their menu screen display codes. Table 6 on page 20

describes the ADC Config menu options. Selections in bold type are the factory default settings.

Table 5. H4TU-C-319 List 1 Standard Config Menu Options

Standard Config

Menu Options

Screen

Display Code

Selection

Description

Loopback Timeout

LBTO

NONE

20 min

60 min

120 min

8 hr

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.

Sets automatic cancellation of all loopbacks to 8 hours after initiation.

Sets automatic cancellation of all loopbacks to 24 hours after initiation.

24 hr

Loop Attenuation

Threshold

LATT

0 through

50 dB

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

disables the alarm. The loop attenuation threshold cannot be set from the

front-panel pushbuttons.

38 dB

Default value.

Margin Threshold

MARG

FRMG

0 to 15 dB

Determines the minimum allowable margin below which a system alarm can

occur. Zero disables the alarm. The Margin (Alarm) threshold cannot be set

from the front-panel pushbuttons.

4 dB

Default value.

DS1 Frame

Formatting

AUTO

Configures the HDSL4 system 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

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

Configures the HDSL4 system to search for the SF framing pattern at its DS1

input.

ESF

Configures the HDSL4 system to search for the ESF framing pattern at its DS1

input.

UNFR

AUTO

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

ES-P and SES-P counters to increment.

DS1 Line Coding

DS1

The H4TU-C and H4TU-R monitor the incoming DS1 bit streams for the B8ZS

code. If the H4TU-R detects this code, the H4TU-C enters B8ZS output mode.

The H4TU-C reverts back to AMI output mode if no B8ZS codes are received

at the H4TU-R input for 5 seconds. Similarly, when the H4TU-C detects the

B8ZS code, the H4TU-R enters the B8ZS mode and returns to AMI mode if no

B8ZS code is received at the H4TU-C input for 5 seconds.

See “DS1 Line

Coding (DS1)

Option” on page 21.

B8ZS

AMI

Places both the H4TU-C and H4TU-R into their B8ZS modes.

Places both the H4TU-C and H4TU-R into their AMI modes.

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

H4TU-C Equalization EQL

0 ft

See “H4TU-C

Equalization (EQL)

Option.” on page 21.

133 ft

266 ft

399 ft

533 ft

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.

H4TU-R Line

Buildout

RLBO

Sets the DS1 receive level output toward the Customer Interface (CI). Line

buildout can only be set through the maintenance screens.

0 dB

Sets the DS1 RLBO level toward the CI to 0 dB.

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

Sets the DS1 RLBO level toward the CI to -15.0 dB.

-7.5 dB

-15 dB

AIS

Alarm Pattern

ALMP

Enables the HDSL4 system to output an AIS payload at its DS1 ports for

LOSW and LOS DS1. For priority resolution, see Figure 27 on page 45.

See “Alarm Pattern

(ALMP) Option.” on

page 22.

LOS

Enables the HDSL4 system to output an LOS condition at its DS1 ports for

LOSW and LOS DS1.

Continued

H4TU-C-319 List 1

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LTPH-UM-1031-03, Issue 3

Table 5. H4TU-C-319 List 1 Standard Config Menu Options (Continued)

Standard Config

Menu Options

Screen

Display Code

Selection

Description

H4TU-R TLOS

Loopback

TLOS

ENA

Enables a logic loopback at the H4TU-R when an LOS occurs at its DS1 input.

For priority resolution, see Figure 27 on page 45.

DIS

AIS

Disables TLOS logic loopback.

Network Loopback

Pattern

NLBP

Enables the H4TU-R to transmit AIS towards the CI for any network loopback.

For priority resolution, see Figure 27 on page 45.

LOS

Enables the H4TU-R to transmit LOS towards the CI for any network

loopback.

Power Back Off -

Network

See “Power Back Off

(PBON and PBOC)

Options” on page 22.

PBON

PBOC

DEF

Configures the power output levels of the H4TU-C network unit toward the

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

ANSI T1.418.

ENH

DEF

ENH

Configures the power output levels of the H4TU-C network unit toward the

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

of ANSI T1.418.

Power Back Off -

Customer

See “Power Back Off

(PBON and PBOC)

Options” on page 22.

Configures the power output levels of the H4TU-R customer unit toward the

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

ANSI T1.418.

Configures the power output levels of the H4TU-R customer unit toward the

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

of ANSI T1.418.

Table 6. H4TU-C-319 List 1 ADC Config Menu Options

ADC Config Menu

Options

Screen

Display Code

Selection

Description

Line Power Feed

PWRF

OFF

Disables powering to the HDSL4 pair.

LOW

HIGH

AUTO

Keeps the HDSL4 line voltage at nominal -185 Vdc.

Keeps the HDSL4 line voltage at nominal 123 Vdc.

Keeps the H4TU-C line voltage at -185 Vdc when line powering up to two

devices (one doubler and one remote unit, or two doubler units). When line

powering of more than two devices is required, the line unit automatically

switches to 123 Vdc.

Remote Provisioning RTPV

ENA

DIS

Enables remote provisioning.

Disables remote provisioning.

Bipolar Violation

Transparency

See “Bipolar

Violation

Transparency

(BPVT) Option” on

page 22.

BPVT

ENA

Enables BPVs and HDSL4 CRC errors at the DS1 input to be converted into

DS1 BPVs at the DS1 output at the distant end. This makes HDSL4

transparent to BPVs.

DIS

Disables BPV Transparency.

DS1 BER Threshold DBER

ENA

Enables the fixed 24-hour DS1 BER threshold.

See “DS1 Bit Error

Rate (DBER) Option”

on page 22.

DIS

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

Continued

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H4TU-C-319 List 1

LTPH-UM-1031-03, Issue 3

Provisioning

Table 6. H4TU-C-319 List 1 ADC Config Menu Options (Continued)

ADC Config Menu

Options

Screen

Display Code

Selection

Description

HDSL4 BER

Threshold

HBER

1E-6

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

Block Error Rate (BER) exceeds 10^-6. (Block Error Rate is based on the

definition of Bit Error Rate.)

See “HDSL4 Block

Error Rate Threshold

(HBER) Option” on

page 21 and

1E-7

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

exceeds 10^-7.

NONE

Prevents generation of a system alarm due to BER.

“System Alarm

Output Pin” on

page 63.

SmartJack Loopback LPBK

ENA

DIS

ENA

DIS

ENA

DIS

Enables the HDSL4 system to recognize all inband SmartJack (SMJK)

loopback commands.

Configures the HDSL4 system to ignore all inband SmartJack loopback

commands.

Minor Alarm

ALM

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.

Remote Disconnect RDA

Alarm

Enables a remote DS1 LOS condition at the input to the H4TU-R to generate

an LOS alarm. AIS or LOS (depending on ALMP) is sent towards the network.

Prevents a remote DS1 LOS condition at the input to the H4TU-R from

causing an LOS alarm. The front-panel Status LED still flashes red and the

ALRM RLOS message appears, but the alarm relay contacts do not close and

LOS is sent towards the network from the H4TU-C instead of AIS.

HDSL4 Block Error Rate Threshold (HBER) Option. The HBER option permits monitoring of loop

integrity and reporting of alarms when excessive errors are detected. The performance monitoring (PM) primitive

used for this purpose is the CRC checksum performed on the HDSL4 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 Monitor

screen displays the CRC errors and counts for both the H4TU-C and H4TU-R. The HBER option allows an alarm

to be generated if the total number of CRCs at either the H4TU-C or H4TU-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.

DS1 Line Coding (DS1) Option. The DS1 line code option should always be set to conform to the type of

DS1 service (AMI or B8ZS) being provided by the system. The Auto mode, which can adapt to either AMI or

B8ZS, should only be used in applications that require it (such as when ADC system acts as a standby circuit to

DS1 circuits whose line codes are not known or may be both AMI and B8ZS). This is because the Auto mode

induces one BPV in the DS1 bit stream whenever it switches from AMI to B8ZS. The Auto mode allows both the

H4TU-C and the H4TU-R to set its DS1 output code to that which is being received at the distant end DS1 input.

This forces the input and the output codes in each direction of transmission to be identical.

H4TU-C Equalization (EQL) Option. The equalizer shapes the DS1 output signal of the H4TU-C to conform

to a very specific pulse template when it arrives at the DSX-1 cross-connect point. The degree of pulse-shaping

required is a function of the distance between the H4TU-C’s equipment bay and the DSX-1 panel. Thus, the

equalizer has six discrete settings, in increments of 133 feet to cause the maximized separation of 655 feet.

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LTPH-UM-1031-03, Issue 3

Alarm Pattern (ALMP) Option. To improve HDSL4 compatibility with the switch-to-protect features used in

Digital Loop Carrier (DLC) feeder applications, the H4TU-C-319 has an 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 H4TU-C-319 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 H4TU-C-319

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 Bit Error Rate (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.

Table 7. DS1/DSX-1 24-Hour PM Threshold

Parameter

Threshold Count

CV-L (BPV)

133,400

132,960

691

CV-P (CRC)

CV-P (FE in SF)

ES-L, ES-P, PRM-NE, PRM-FE

SES-L, SES-P

648

100

UAS-P, UAS-L

Power Back Off (PBON and PBOC) Options. Power Back Off Network (PBON) and Power Back Off

Customer (PBOC) allow the HDSL4 circuit to support two transmit power templates: default (DEF), higher level,

and enhanced (ENH), lower level. These are defined in the four-wire section of the ANSI T1.418 Issue 2 HDSL2

standard. Each HDSL4 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 HDSL4

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 H4TU-R, set the PBOC option to its lower (ENH) level

setting. Conversely, if the HDSL4 signal at the H4TU-R is being affected by crosstalk noise induced from adjacent

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

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LTPH-UM-1031-03, Issue 3

Provisioning

Changing these Power Back Off option settings on a live circuit causes the HDSL4 loop to

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

margins.

Resetting to Factory Defaults

Resetting the H4TU-C to its original factory settings may cause interruption of service.

To reset the H4TU-C-319 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 are certain you want to reset the H4TU-C, or press N to cancel this action.

Monitor Performance Event Log Config Inventory Report Rlogon

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

Help

| Standard Options -> |

| ADC Options

-> |

| BERT Generator

| 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

02/01/2002 12:30:01

H4TU-C

System: OK___

Figure 9. Config Menu - Set Factory Defaults

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LTPH-UM-1031-03, Issue 3

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 collection

of accurate and meaningful data thereafter.

Monitor Performance Event Log Config Inventory Report Rlogon

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

Help

| Standard Options -> |

| ADC Options

-> |

| BERT Generator

| 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

02/01/2002 12:30:01

H4TU-C

System: OK___

Figure 10. 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 either interface (H4TU-C DS1, H4TU-R DS1, H4TU-C HDSL, H4DU-1

NET HDSL, H4DU-1 CPE HDSL, H4DU-2 NET HDSL, H4DU-2 CPE HDSL, or H4TU-R HDSL),

then press ENTER .

Press to select statistics.

↓

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

48-Hour History, or 31-Day History), and 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 HDSL4 Alarm screens, see Table 11 on page 36.

Press L to clear the screen.

Press Y to confirm.

To clear ALL history, alarm, and event log screens by this method:

Press C to select the Config screen.

Use the and arrow keys to select Master Clear.

↑

↓

Press ENTER to activate.

Press Y to confirm (clear all screens).

September 12, 2003

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LTPH-UM-1031-03, Issue 3

Monitoring System Activity and Performance

MONITORING SYSTEM ACTIVITY AND

PERFORMANCE

The HDSL4 system 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, 25-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.

SYSTEM OVERVIEW

The H4TU-C-319 List 1 supports up to two doublers with three HDSL4 spans as shown in Figure 11.

Central Office

H4D1

H4D2

H4TU-C

H4TU-R

Span 1

Span 2

Span 1

Span 3

2 Doublers

Span 2

1 Doubler

No Doubler

Figure 11. System Spans

The Monitor and Performance screens provide important activity and performance information about the HDSL4

spans and span devices.

USING THE MONITOR SCREEN TO VIEW SYSTEM ACTIVITY

Press M to view the system diagram.

Figure 12 on page 26 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.

See Table 8 on page 26 for screen field descriptions.

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Monitoring System Activity and Performance

LTPH-UM-1031-03, Issue 3

DS1 Errors

Armed Mode Loop Attenuation

HDSL4 Errors

Alarm Type

BERT Status

Help

Insertion Loss

Monitor Performance Event Log Config Inventory Report Rlogon

BERT Status: ACTIVE Time Elapsed: 00:00:50 Error Rate: <1.00E-10

=16

171

LA =17

INSL=23

ES =0

SES =0

UAS =0

ARM

ESF

B8ZS

ESF

B8ZS

151

------->+-----+

LP1

+-----+

LP1

+-----+

LP1

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

| TUC |=MAL========| DU1 |============| DU2 |============| TUR |

ESF

| ESF

B8ZS | LPF |============|

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

| B8ZS

<-------+-----+

LP2

+-----+ LP2 +-----+

LP2

+-----+<------

ES =6884 M

=15

ES =0

SES=0

UAS=0

PRM=0

SES=0

LA =18

UAS=56

INSL=24

ES =0

SES =0

UAS =0

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

Active Loopbacks : NLOC-PL

Press <Space> to select LB New Loopback: NLOC – Loopdown All Active Loopbacks

and <Enter> to activate

ID: xxxx--xxxx—-xxxx--xxxx

(LPDN,NLOC,CREM,NREM,CLOC)

02/01/2002 12:30:01 H4TU-C System: OK___

Margin

Active Loopback

System Status

Frame Code and Type

Figure 12. Monitor Screen - Active Loopback with Alarms

To initiate a loopback, press the SPACEBAR to cycle through the loopback choices. Press ENTER to make

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 42.

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.

Table 8. Monitor Screen Descriptions

Field

Description

Active Loopback

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

indicated by gray text. See Table 16 on page 51 for a summary of the HDSL4 generic loopback

codes and activation methods.

Alarm Type

MAL

Indicates type of alarm.

Margin Alarm—Indicates the margin on HDSL4 loop has dropped below the threshold (0 to 15 dB)

set by the operator.

Armed Mode

BERT Status

DS1 Errors

ES Count

Indicates system is in an armed state for an intelligent repeater loopback command.

Provides BERT Generator status, elapsed time, and BERT results.

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.

SES 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.

Continued

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LTPH-UM-1031-03, Issue 3

Monitoring System Activity and Performance

Table 8. Monitor Screen Descriptions (Continued)

Description

Field

UAS Count

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

a 24-hour period.

Frame and Code Type

ESF

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

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

B8ZS

HDSL4 Errors

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.

SES Count

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 Seconds—The number of seconds the HDSL4 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 number.

INSL

Insertion Loss—The signal loss value for a 196 kHz signal over the cable pair.

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

(OPAM) transmission pulse from the distant end. Proper HDSL4 loop operation requires that this

value be less than 34 dB. This value differs from the insertion loss value of a conventional 196 kHz

signal.

LPF

Line Power Feed—Indicates the HDSL4 line power is on.

Margin—The signal-to-noise ratio at all HDSL4 ports, relative to a 10^-7Bit Error Rate.

PL (or HG)

PL displays when the loopback was initiated by a command embedded in the DS1 data path

payload (PL). HG displays when the loopback was initiated from a HDSL Generic (HG) front panel

or by a maintenance terminal loopback command.

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 35.

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Monitoring System Activity and Performance

LTPH-UM-1031-03, Issue 3

USING THE PERFORMANCE SCREENS TO VIEW PERFORMANCE DATA

The Performance screens display:

•

DS1 and HDSL4 statistics in 31-day, 48-hour, 25-hour, and current history reports.

Alarm statistics for the HDSL4 (Figure 22 on page 35) or DS1 interfaces (Figure 23 on page 36) on a

continuous basis.

To access the Performance history screens:

Press P to select the Performance screen.

Press the SPACEBAR to select either interface (H4TU-C DS1, H4TU-R DS1, H4TU-C HDSL, H4DU-1

NET HDSL, H4DU-1 CPE HDSL, H4DU-2 NET HDSL, H4DU-2 CPE HDSL, or H4TU-R HDSL), 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 .

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 H4TU-C and the H4TU-R (as viewed from the H4TU-C).

Figure 13 is an example of an a DS1 performance history screen at the remote unit. Figure 14 and Figure 15 on

page 29 are examples of DS1 performance history screens at the line unit. Table 9 on page 31 describes the

acronyms used in the performance history screens. Asterisks indicate performance monitoring from the previous

day.

Monitor Performance Event Log Config Inventory Report Rlogon

Help

H4TU-R DS1

31-Day History (Page 1 of 3)

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

Date

CV-L

ES-L SES-L UAS-L

CV-P

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

01/18

01/19

01/20

01/21

01/22

01/23

01/24

01/25

01/26

01/27

01/28

01/29

0 86400

0 86401

0 86400

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 : H4TU-R DS1

Statistics : 31-Day History

02/01/2002 12:30:01

H4TU-C

System: OK___

Figure 13. H4TU-R DS1 31-Day Performance History

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LTPH-UM-1031-03, Issue 3

Monitoring System Activity and Performance

Monitor Performance Event Log Config Inventory Report Rlogon

Help

H4TU-C DS1

25-Hour History (Page 1 of 9)

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

Time

CV-L

ES-L SES-L UAS-L

CV-P

ES-P SES-P UAS-P

*15:15

*15:30

*15:45

*16:00

16:15

16:30

16:45

17:00

17:15

17:30

17:45

18:00

900

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 : H4TU-C DS1

Statistics : 25-Hour History

02/01/2002 12:30:01

H4TU-C

System: OK___

Figure 14. H4TU-C DS1 25-Hour Performance History

Monitor Performance Event Log Config Inventory Report Rlogon

Help

H4TU-C DS1

48-Hour History (Page 1 of 4)

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

Time

CV-L

ES-L SES-L UAS-L

CV-P

ES-P SES-P UAS-P

*17:00

*18:00

*19:00

*20:00

*21:00

*22:00

*23:00

*00:00

*01:00

*02:00

*03:00

*04:00

3600

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 : H4TU-C DS1

Statistics : 48-Hour History

02/01/2002 12:30:01

H4TU-C

System: OK___

Figure 15. H4TU-C DS1 48-Hour Performance History

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Monitoring System Activity and Performance

LTPH-UM-1031-03, Issue 3

Examples of current statistics screens are shown below. Figure 16 and Figure 17 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 9 on page 31 for descriptions of the kinds of errors reported on these screens.

Monitor Performance Event Log Config Inventory Report Rlogon

Help

H4TU-R DS1 Current Statistics

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

1 Day

05:57

1 Hour

07:00

15 Min

07:00

Start

CV-L

ES-L

SES-L

UAS-L

CV-P

ES-P

SES-P

UAS-P

PRM-NE

PRM-FE

B8ZSS

MSEC

No PRM Detected

Press: C(l)ear Current Statistics

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

Use <Space> to cycle through

choices and <Enter> to view

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

Interface : H4TU-R DS1

Statistics : Current

02/01/2002 12:30:01

H4TU-C

System: OK___

Figure 16. H4TU-R DS1 Current Statistics

Monitor Performance Event Log Config Inventory Report Rlogon

Help

H4TU-C DS1 Current Statistics

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

1 Day

05:57

1 Hour

07:00

15 Min

07:00

Start

CV-L

ES-L

SES-L

UAS-L

CV-P

ES-P

SES-P

UAS-P

476

4242

B8ZSS

MSEC

476

4242

Press: C(l)ear Current Statistics

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

Use <Space> to cycle through

choices and <Enter> to view

ID: xxxx--xxxx—-xxxx--xxxx

Interface : H4TU-C DS1

Statistics : Current

02/01/2002 12:30:01

H4TU-C

System: OK___

Figure 17. H4TU-C DS1 Current Statistics

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LTPH-UM-1031-03, Issue 3

Monitoring System Activity and Performance

Table 9. Acronyms Used on the DS1 Performance History Screens

Acronym

Description

Acronym

Description

CV-L

Code Violation - Line

Total BPV count.

SES-P

Severely Errored Seconds - Path

Seconds with SES or CRC(ESF) ≥320 or

FE ^(a)(SF) ≥8 (F_T+ F_S).

ES-L ^(b)

SES-L

Errored Seconds - Line

UAS-P

Unavailable Seconds - Path

A second of unavailability based on SES-P or

AIS ≥1.

Performance Report Messaging - Near End

The PRM from CPE indicates errors, and the

signal received from the network at the

remote is error-free.

Performance Report Messaging - Far End

The PRM from the network indicates errors,

and the signal received from the CPE is

error-free.

Seconds with BPV ≥1.

Severely Errored Seconds - Line

Seconds with BPV plus EXZ ≥1544 or LOS ≥1.

PRM-NE ^(c)

UAS-L

Unavailable Seconds - Line

Seconds with LOS ≥1.

PRM-FE ^(c)

CV-P

Code Violation - Path

B8ZSS ^(d)

MSEC ^(d)

B8ZS Errored Seconds

Total count of SF frame bit (FB) errors or

CRC(ESF) errors.

Seconds with B8ZS detection when AMI

option is active.

ES-P ^(e)

Errored Seconds - Path

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

FE ^(a)(SF) ≥1.

Monitored Seconds of the current

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

(a) FE is a frame bit error.

(b) Line (L) refers to the AMI DS1 line used to transport the payload.

(d) Displays on the DS1 Current Statistics screens.

(e) Path (P) refers to the total framed payload being transported between two points.

(f) 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.

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Monitoring System Activity and Performance

LTPH-UM-1031-03, Issue 3

Performance History at the HDSL4 Interface

The HDSL4 interface has 31-day, 48-hour, 25-hour, and current statistic screens for the H4TU-C. Figure 18 and

Figure 19 below are examples of 31-day and 48-hour performance history screens. Figure 20 on page 33 is an

example of a 25-hour performance history screen. Refer to Table 10 on page 34 for descriptions of the kinds of

errors reported on all HDSL4 performance screens. Asterisks indicate performance monitoring from the previous

day.

Monitor Performance Event Log Config Inventory Report Rlogon

Help

LP1/LP2

H4TU-C HDSL

31-Day History (Page 1 of 3)

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

Date

SES

UAS

LOSWS

01/19

01/20

01/21

01/22

01/23

01/24

01/25

01/26

01/27

01/28

01/29

01/30

0/0

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 : H4TU-C HDSL

Statistics : 31-Day History

02/01/2002 12:30:01

H4TU-C

System: OK___

Figure 18. H4TU-C HDSL (Loop 1/Loop 2) 31-Day Performance History

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Help

LP1/LP2

H4TU-C HDSL

48-Hour History (Page 1 of 4)

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

Time

SES

UAS

LOSWS

*08:00

*09:00

*10:00

*11:00

*12:00

*13:00

*14:00

*15:00

*16:00

*17:00

*18:00

*19:00

0/0

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 : H4TU-C HDSL

Statistics : 48-Hour History

02/01/2002 12:30:01

H4TU-C

System: OK___

Figure 19. H4TU-C HDSL (Loop 1/Loop 2) 48-Hour Performance History

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LTPH-UM-1031-03, Issue 3

Monitoring System Activity and Performance

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Help

LP1/LP2

H4TU-C HDSL

25-Hour History (Page 1 of 9)

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

Time

SES

UAS

LOSWS

*06:45

*07:00

*07:15

*07:30

07:45

08:00

08:15

08:30

08:45

09:00

09:15

09:30

0/0

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 : H4TU-C HDSL

Statistics : 25-Hour History

02/01/2002 12:30:01

H4TU-C

System: OK___

Figure 20. H4TU-C HDSL (Loop 1/Loop 2) 25-Hour Performance History

Figure 21 shows statistics for the HDSL4 interface at the H4TU-C. This screen reports 1-day, 1-hour, and

15-minute statistics. Refer to Table 10 on page 34 for descriptions of the kinds of errors reported on this screen.

Monitor Performance Event Log Config Inventory Report Rlogon

Help

H4TU-C HDSL

Current Statistics

LP1/LP2

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

1 Day

05:57

1 Hour

07:00

15 Min

07:30

Start

SES

UAS

LOSWS

0/0

Margin(dB)

16/17

LA(dB)

0/0

INSL(dB)

0/0

Cur

Low

14/16

13/13

Press: C(l)ear Current Statistics

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

Use <Space> to cycle through

choices and <Enter> to view

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

Interface : H4TU-C HDSL

Statistics : Current

02/01/2002 12:30:01

H4TU-C

System: OK___

Figure 21. H4TU-C HDSL (Loop 1/Loop 2) Current Statistics

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Monitoring System Activity and Performance

LTPH-UM-1031-03, Issue 3

Table 10. Acronyms Used on the HDSL4 Performance History Screens

Acronym

Description

Code Violation

Total count of HDSL4 CRC errors

Errored Seconds

Seconds with HDSL4 CRC ≥1 or LOSW ≥1

SES

Severely Errored Seconds

Seconds with HDSL4 CRC ≥50 or LOSW ≥1

UAS

LOSWS

Unavailable Seconds

Based on 10 contiguous SES occurrences

Loss of Sync Word Second

Seconds with LOSW ≥1

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LTPH-UM-1031-03, Issue 3

Monitoring System Activity and Performance

USING THE PERFORMANCE SCREENS TO VIEW ALARM DATA

To access the alarm history screens:

Press P to select the Performance screen.

Press the SPACEBAR to select an interface (H4TU-C DS1, H4TU-R DS1, H4TU-C HDSL, H4DU-1 NET

HDSL, H4DU-1 CPE HDSL, H4DU-2 NET HDSL, H4DU-2 CPE HDSL, or H4TU-R HDSL), then press

ENTER .

Press the SPACEBAR until Alarm History is selected, then press ENTER . (To clear the selected alarm history

screen, press L .)

Alarm History at the DS1 Interface

The Alarm History screen reports DS1 statistics for the H4TU-C (Figure 22) and the H4TU-R (Figure 23 on

page 36) on a continuous basis. The types of alarms reported are described in Table 11 on page 36. Current alarms

are shown in reverse video.

Monitor Performance Event Log Config Inventory Report Rlogon

Help

H4TU-C DS1 Alarm History

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

Alarm

First

Last

Status

Count

LLOS

01/30/02

ALARM

LAIS

DBER

LOF

01/30/02

Press: C(l)ear Alarm History

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

Use <Space> to cycle through

choices and <Enter> to view

ID: xxxx--xxxx--xxxx—-xxxx

Interface : H4TU-C DS1

Statistics : Alarm History

02/01/2002 12:30:01

H4TU-C

System: Alarm

Figure 22. H4TU-C DS1 Alarm History Screen

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Monitoring System Activity and Performance

LTPH-UM-1031-03, Issue 3

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Help

H4TU-R DS1 Alarm History

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

Alarm

First

Last

Status

Count

RLOS

RAIS

RAI

LRAI

PRM-NE

PRM-FE

DBER

LOF

01/30/02 00:37

01/30/02 00:45

Press: C(l)ear Alarm History

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

Use <Space> to cycle through

choices and <Enter> to view

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

Interface : H4TU-R DS1

Statistics : Alarm History

02/01/2002 12:30:01

H4TU-C

System: Alarm

Figure 23. H4TU-R DS1 Alarm History Screen

Table 11. DS1 Alarm Descriptions

Front-Panel

Alarm

Screen Alarm

Description

H4TU-C DS1 Alarms (Figure 22 on page 35)

LLOS ^(a)

LAIS ^(a)

LLOS

LAIS

Line (Unit) Loss of Signal—Loss of the H4TU-C DSX-1 input signal.

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

H4TU-C DS1 input port.

DBER

LOF

xxx-DBER

xxx-LOF

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.)

Loss of Frame—Indicates the incoming DS1 frame pattern is other than the one selected, ESF or SF,

by the FRMG option. Only occurs if the FRMG option is set to SF or ESF. (xxx denotes either TUC or

TUR.)

H4TU-R DS1 Alarms (Figure 23 on this page)

RLOS ^(b)

RAIS

RLOS

RAIS

Remote (Unit) Loss of Signal—Loss of the H4TU-R DS1 input signal.

Remote Alarm Indication Signal—Indicates an AIS (unframed all ones) pattern is being received at the

H4TU-R DS1 input port. By default AIS-CI ^(b)is sent towards the network (see Figure 27 on page 45)

RAI

RRAI

Remote RAI - Remote Alarm Indication at the H4TU-R—Indicates an RAI alarm (yellow) from the CPE

with errors from the line unit or network.

LRAI

Line (Clear) Remote Alarm Indication—An RAI condition is detected at the remote and the signal from

the line unit is error-free. RAI signal is transmitted towards the network.

PRM-NE

PRM-FE

DBER

LOF

PRMN

PRMF

Performance Report Messaging - Near End—The count of the PRM-NE register at the H4TU-R

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

Performance Report Messaging - Far End—The count of the PRM-FE register at the H4TU-R exceeds

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

xxx-DBER

xxx-LOF

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.)

Loss of Frame—Indicates the incoming DS1 payload does not contain the specific frame pattern, ESF

or SF, selected by the FRMG option. Only occurs if the FRMG option is set to SF or ESF. (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.

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LTPH-UM-1031-03, Issue 3

Monitoring System Activity and Performance

Alarm History at the HDSL4 Interface

The HDSL4 Alarm History screens report alarms for the HDSL4 interface at the H4TU-C and H4TU-R. Figure 24

shows the H4TU-C HDSL4 alarm history. Table 12 describes the alarms that are reported at the H4TU-C or

H4TU-R.

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Help

H4TU-C HDSL

Alarm History

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

Alarm

First

Last

Status

Count

LOSW-LP1

MAL -LP1

LA -LP1

HBER-LP1

LOSW-LP2

MAL -LP2

LA -LP2

HBER-LP2

SHORT

01/15/02 16:45

01/15/02 16:44

01/15/02 16:45

01/15/02 16:44

DISABLED

01/15/02 16:45

DISABLED

GND

OPEN

Press: C(l)ear Alarm History

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

Use <Space> to cycle through

choices and <Enter> to view

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

Interface : H4TU-C HDSL

Statistics : Alarm History

02/01/2002 12:30:01

H4TU-C

System: Alarm

Figure 24. H4TU-C HDSL Alarm History Screen

Table 12. HDSL4 Alarm Descriptions

Screen Alarm

Front-Panel Alarm

Description

HDSL4 Alarms at the H4TU-C and H4TU-R

LOSW

MAL

SPNn-LOSW

xxxx-MALx

Loss of Sync Word—The HDSL4 loop has lost synchronization.

Margin—The margin on the HDSL4 loop has dropped below the minimum threshold

value set for the system.

xxxx denotes TUC, TUR, or first (DU1U/DU1D) or second (DU2U/DU2D) doubler HDSL4

upstream or downstream interface. If TUC and TUR occur at the same time, then TUC

displays. The single x indicates Loop 1 or Loop 2.

xxxx-LAx

Loop Attenuation—The attenuation on the HDSL4 loop has exceeded the maximum value

set for the HDSL4 loop attenuation threshold.

xxxx denotes TUC, TUR, or first (DU1U/DU1D) or second (DU2U/DU2D) doubler HDSL4

upstream or downstream interface. If TUC and TUR occur at the same time, then TUC

displays. The single x indicates Loop 1 or Loop 2.

HBER

xxxx-HBRx

Block Error Rate—The HDSL4 BER has exceeded the set threshold limits of 10^-6or 10^{- 7}.

xxxx denotes TUC, TUR, or first (DU1U/DU1D) or second (DU2U/DU2D) doubler HDSL4

upstream or downstream interface. If TUC and TUR occur at the same time, then TUC

displays. The single x indicates Loop 1 or Loop 2.

HDSL4 Alarms at the H4TU-C only

SHORT ^(a)

GND ^(a)

OPEN ^(a)

PWR FEED SHRT

PWR FEED GND

PWR FEED OPEN

Indicates a short between Loop 1 and Loop 2 of the HDSL4 pair.

One of the HDSL4 loops is grounded.

Indicates a line power open condition.

(a) Displays only at the H4TU-C HDSL interface.

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Monitoring System Activity and Performance

LTPH-UM-1031-03, Issue 3

USING THE EVENT LOG TO TRACK SYSTEM 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 (the most recent displayed first) and provides a description of each event. See

Table 13 on page 39 for an alphabetical listing of all possible 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.

Monitor Performance Event Log Config Inventory Report Rlogon

Help

System Event Log (Page 1 of 7)

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

Origin

Date and Time

Entry

Line Unit

01/15/02 16:44:41

01/15/02 16:44:39

MAL Alarm TUC Lp 1: End

LOSW Alarm span 1: End

MAL Alarm TUC Lp 1: Begin

Time set to 16:44:18

DS1 AIS Alarm: Begin

LOSW Alarm span 1: Begin

Managment Host 01/15/02 16:45:10

Line Unit

01/15/02 16:45:03

01/15/02 00:00:00

01/15/02 16:15:33

01/15/02 16:15:31

01/15/02 16:15:03

01/15/02 00:00:00

01/15/02 14:53:17

01/15/02 14:53:16

Time set to 16:45:00

MAL Alarm TUC Lp 1: End

LOSW Alarm span 1: End

MAL Alarm TUC Lp 1: Begin

DS1 AIS Alarm: Begin

LOSW Alarm span 1: Begin

Time set to 16:15:00

10 Line Unit

11 Line Unit

12 Line Unit

13 Line Unit

14 Line Unit

15 Line Unit

MAL Alarm TUC Lp 2: End

LOSW Alarm span 1: End

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

ID: xxxx--xxxx—-xxxx--xxxx 02/01/2002 12:30:01 H4TU-C System: OK___

Figure 25. System Event Log

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LTPH-UM-1031-03, Issue 3

Monitoring System Activity and Performance

Table 13. Event Log Entry Messages List

Event Log Messages

HDSL4 DC pair open begins/ends on any segment

HDSL4 Ground fault begins/ends on any segment

H4TU-C Power up/down

H4TU-R Power up/down

HDSL4 margin alarm (threshold crossed) on any HDSL4 Interface (I/F)

HDSL4 loop attenuation (threshold crossed) on any HDSL4 I/F

HDSL4 HBER alarm (threshold crossed) on any HDSL4 I/F

HDSL4 LOSW begins/ends on any segment

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

PRM-FE)

CPE PRM-NE BER alarm (at the remote only: 1-day PRM-NE threshold crossed:

trouble on CPE receive)

NTWK PRM-FE BER alarm (at the remote only: 1-day PRM-FE threshold

crossed: trouble on NTWK far end)

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

CPE DS1 LOS begins/ends

CPE DS1 AIS begins/ends

NTWK DS1 LOS begins/ends

NTWK DS1 AIS begins/ends

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

RAI begins/ends

Any HDSL4 PM register reset

Any DS1 PM register reset

Any DS1 Alarm History reset

Any HDSL4 Alarm History reset

Event Log reset

Current statistics reset

Master zero reset

Any provisioning option change: <provisioning mnemonic>: changed from

Any Loop Up (any segment)

Any Loop Down (any segment)

Power Feed Short begins / ends

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Monitoring System Activity and Performance

LTPH-UM-1031-03, Issue 3

USING THE REPORT MENU

The Report menu (Figure 26) 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 14 on page 41 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 type and print mode.

—

Continuous Print Mode generates a non-stop version of the report.

Page Mode generates a page-by-page version of the report for easy viewing on the screen.

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

printer. Press ENTER to generate. (If Page Mode is selected, press the SPACEBAR to continue or ^ESCto quit.)

End the captured report.

Press CTRL + R to refresh the Report menu screen.

Monitor Performance Event Log Config Inventory Report Rlogon

Help

Report Type : Full Report

Print Mode : Continuous

Please select report type and print mode by pressing <Space>, then start

terminal logging and press <Enter> to generate the report.

ID: xxxx—-xxxx—-xxxx--xxxx

02/01/2002 12:30:01

H4TU-C

System: OK_

Figure 26. Report Menu - Full Report

September 12, 2003

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LTPH-UM-1031-03, Issue 3

Monitoring System Activity and Performance

Table 14. 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

Circuit and unit identifications

Product information

Short Report

System configuration

Current performance statistics

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-1031-03, Issue 3

TESTING

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

procedure, and loopback testing.

SYSTEM ALARMS

Table 15 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 Performance Data”

on page 28). Alarms that are not inhibited will drive the front-panel Status LED to a flashing red alarm state.

Table 15. Front-Panel System Alarms

Front-Panel

Alarm

Description

To Inhibit:

Message ^(a)

PWR FEED

SHRT ^(b)

Power Feed Short

A short exists between Loop 1 and Loop 2 of Cannot be inhibited.

the HDSL4 pair.

PWR FEED

GND ^(b)

Power Feed Ground

Power Feed Open

One of the HDSL4 loops is grounded.

Cannot be inhibited.

PWR FEED

OPEN ^(b)

A line power open condition exists.

SPNn-LOSW Span(n)-Loss of Sync The HDSL4 loop has lost synchronization.

Word ^(c)

The span closest to the network has highest

priority.

LLOS

RLOS

Line (Unit) Loss of

Signal

Loss of the DSX-1 input signal.

Cannot be inhibited.

Remote (Unit) Loss of Loss of the H4TU-R DS1 input signal.

Signal

Disable the RDA (Remote Disconnect

Alarm) option. This prevents an LOS

condition at the DS1 input to a H4TU-R

from activating pin H. The front-panel

Status LED still flashes red and the ALRM

RLOS message displays to alert you of the

LOS state. LOS is sent towards the

network from the H4TU-C. This option

prevents the common occurrences of a

CPE LOS condition from generating

recurring alarms and AIS payloads.

LAIS

RAIS

LRAI

Line Alarm Indication Indicates an AIS (unframed all ones) pattern Cannot be inhibited.

Signal

is being received at the H4TU-C DS1 input

port.

Remote Alarm

Indication Signal

Indicates an AIS (unframed all ones) pattern Cannot be inhibited.

is being received at the H4TU-R DS1 input

port.

Line RAI—Remote

Indicates an RAI alarm (yellow) from the CPE Cannot be inhibited.

Alarm Indication at the with an error-free signal from the line unit or

H4TU-R (Net signal

does not have errors.) the network.

network. RAI signal is transmitted towards

Continued

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H4TU-C-319 List 1

LTPH-UM-1031-03, Issue 3

Testing

Table 15. Front-Panel System Alarms (Continued)

Description To Inhibit:

Front-Panel

Alarm

Message ^(a)

RRAI

Remote RAI—Remote Indicates an RAI alarm (yellow) from the CPE Cannot be inhibited.

Alarm Indication at the with errors from the line unit or network.

H4TU-R (Net signal

has errors.)

xxx-DBER

xxx-LOF

DS1 Bit Error Rate

The DS1 BER has exceeded the set 24-hour Select DIS for the DBER system option.

threshold limit of approximately 10^-6. (xxx

denotes either TUC or TUR. If TUC and TUR

occur at the same time, then TUC displays.)

Loss of Frame

The DS1 input does not contain the ESF or SF Change FRMG option to AUTO or UNFR.

frame pattern setting of the FRMG option.

(xxx denotes either TUC or TUR. If TUC and

TUR occur at the same time, then TUC

displays.)

PRMN

PRMF

Performance Report

H4TU-R PRM-NE BER threshold has been

Set DBER threshold to DIS.

Messaging - Near End exceeded.

Performance Report

Messaging - Far End

H4TU-R PRM-FE BER threshold has been

exceeded.

Set DBER threshold to DIS.

xxxx-HBRx ^(d)HDSL4 Block Error

The HDSL4 BER has exceeded the set

threshold limits of 10^-6or 10^{- 7}.

Select NONE for the HBER system option.

Rate

xxxx denotes TUC, TUR, or first

(DU1U/DU1D) or second (DU2U/DU2D)

doubler HDSL4 upstream or downstream

interface. If TUC and TUR occur at the same

time, then TUC displays. The single x

indicates Loop 1 or Loop 2.

xxxx-MALx ^(d)Margin Alarm

The margin on the HDSL4 loop has dropped

Set the Margin Alarm Threshold option to

below the minimum threshold value set for the zero.

system.

xxxx denotes TUC, TUR, or first

(DU1U/DU1D) or second (DU2U/DU2D)

doubler HDSL4 upstream or downstream

interface. If TUC and TUR occur at the same

time, then TUC displays. The single x

indicates Loop 1 or Loop 2.

xxxx-LAx ^(d)

Loop Attenuation

The attenuation on the HDSL4 loop has

exceeded the maximum value set for the

HDSL4 loop attenuation threshold.

Set the HDSL4 Loop Attenuation

Threshold option to zero.

xxxx denotes TUC, TUR, or first

(DU1U/DU1D) or second (DU2U/DU2D)

doubler HDSL4 upstream or downstream

interface. If TUC and TUR occur at the same

time, then TUC displays. The single x

indicates Loop 1 or Loop 2.

(a) The message, ALRM, displays prior to any alarm message.

(b) Message displays repeatedly as long as the alarm condition exists and is not included in the priority order.

(c) When the HDSL4 loop loses sync word (LOSW), a system alarm condition exists. However, since the H4TU-C-319 enters the

acquiring mode, the front-panel status LED flashes red, and the ACQ or SIG message displays instead of the ALRM message.

(d) Only these alarms assert the System Alarm bus on pin H of the card-edge connector, if the ALM option is set to enabled.

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Testing

LTPH-UM-1031-03, Issue 3

Alarm Option for DLC Feed

To improve HDSL4 compatibility with the switch-to-protect features used in DLC feeder applications, the

H4TU-C-319 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 SEL pushbutton to 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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LTPH-UM-1031-03, Issue 3

Testing

Remote LOS and AIS Response

Figure 27 shows the different ways the H4TU-R can respond to the network, depending on the configuration of

the NLBP, TLOS, RDA, and ALMP configuration options described in Table 5 on page 19 and Table 6 on

page 20.

H4TU-R, DS1 Input

AIS to CPE

AIS

YES

LOS event?

LOS to CPE

NLBP

LOS

ENA

DIS

Loopback to Network

TLOS

RDA

DIS

Pass on LOS to

Network, no alarm

report

ENA

YES

Remove alarm

pattern

AIS event?

LOS

Pass on LOS to

Network

ALMP

Standard Option

ADC Option

AIS

Default configurations are in bold.

AIS to Network

Figure 27. H4TU-R LOS and AIS Response Priorities

OCT55 TEST PATTERN WITH AMI LINE CODE

The OCT 55 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 H4TU-C to report ES, SES, and UAS

errors according to ANSI T1.231-1997.

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Testing

LTPH-UM-1031-03, Issue 3

LOOPBACK OPERATION

HDSL4 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 HDSL4 channels

to the H4TU-C, the H4TU-C DSX-1 interface, and the DS1 channels to the customer.

Loopback options include:

•

Generic Loopback (GNLB) options, including the SmartJack (SMJK) option (see Table 16 on page 51)

A3LB Addressable Repeater Loopback command (see Table 17 on page 52)

A5LB Addressable Repeater Loopback command (see Table 18 on page 53)

Loopback commands can be initiated by:

•

Selecting the loopback type using the MODE and SEL pushbuttons on the H4TU-C front panel or the manual

loopback (LBK) pushbutton on the H4TU-R front panel

Selecting the loopback type from the Monitor menu when connected to the craft port of the H4TU-C or

H4TU-R

Entering the loopback code (exceptions are COLB and RULB) into the test equipment connected to the

H4TU-C or H4TU-R

Span 1

Span 3

Span 2

Activate loopback using

one of the following:

• MODE/SEL pushbuttons

• Maintenance Terminal

• Test Set

Activate loopback using

one of the following:

• LBK pushbutton

• Maintenance Terminal

• Test Set

DSX-1

NLOC

NREM

SMJK

TLOS*

CREM NDU1

CDU1

NDU2

CDU2

CLOC

H4D2

H4TU-C

H4D1

H4TU-R

* When enabled, TLOS is an automatic loopback

that occurs with an LOS at the remote DS1 input.

Customer

Premises

Network

Figure 28. Loopback Summary

ADC HDSL4 supports multiple loopbacks, but a single loopback is the preferred method. HDSL4

automatically rejects activation of closed loop looopbacks. For example, an NREM and CREM

cannot be activated at the same time.

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LTPH-UM-1031-03, Issue 3

Testing

Generic Loopback Commands

The HDSL4 Generic Loopback (GNLB) commands allow you to use inband codes to loop up either

NLOC (4-in-7) or NREM (3-in-7) towards the network. In addition, these inband 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 inband codes must be present for at least 5 seconds before the HDSL4 system responds.

TLOS is a logic loopback caused by loss of the DS1 input from the CI.

Figure 29 on page 50 summarizes the available loopbacks in the system, and Table 16 summarizes the HDSL4

generic loopback commands. See “GNLB Test Procedures” on page 51 for the test procedures that apply

HDSL4 systems feature the SmartJack option, which can emulate a Network Interface Device

(NID) for the purpose of loopback testing of the HDSL4 circuit. SMJK and NREM loopbacks

perform the same functions but their initiation differs. SMJK indicates that the loopback was

initiated by the 2-in-5 inband command. NREM, on the other hand, is initiated by the 3-in-7

inband command or by a command issued from the maintenance terminal or the MODE and SEL

pushbuttons.

Use the inband commands to enable or disable the SMJK loopback options. The H4TU-C-319

system setting is normally enabled to recognize all inband SmartJack loopback commands.

Special Loopback Commands

A3LB and A5LB loopback commands can be sent by a test set connected to the H4TU-C or H4TU-R. See

Table 17 on page 52 and Table 18 on page 53 for a list of the commands.

A3LB and A5LB are special, addressable, repeater loopback modes which are supported by the H4TU-C. These

loopback modes provide the HDSL4 system with sophisticated maintenance and troubleshooting tools. A3LB and

A5LB are patterned after the Westell addressable T1 repeater loopbacks.

The A5LB loopback selection complies with that proposed for HDSL4 systems in the T1E1.4/92 looopback

recommendation with the following additions:

•

Query loopback

IOR (Intelligent Office Repeater) power-down

Four loopback time-out choices

Initiation from either end

Repeating bit error signatures

Alternate query loopback

A5LB does not block the arming code from exiting the H4TU-C-319 into the network. Since A5LB never blocks

the arming code from exiting the H4TU-C, the Far-End Activate code is not available in A5LB. A3LB supports

the additional (1-in-6) SMJK loopback command.

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Testing

LTPH-UM-1031-03, Issue 3

Manual Loopback Session

A manual loopback session allows you to select any one of the HDSL4 loopbacks listed in Table 16 on page 51

with the exception of SmartJack loopbacks, which can only be issued by inband commands.

Setting the Loopback Time-Out Option (LBTO)

Before initiating a loopback session, verify that the Loopback Time-Out parameter is set to the desired setting.

Use the MODE and SEL pushbuttons as described in “Setting Options through MODE and SEL” on page 10.

(The loopback time-out parameter is also user-selectable from the Config Menu, Standard Options screen

when using a maintenance terminal.)

Select the desired setting:

•

NONE (time-out disabled)

20 minutes

60 minutes

120 minutes

8 hr

24 hr

Activating Manual Loopback Mode

With the exception of SmartJack, any of the HDSL4 loopbacks can be executed using the MODE

and SEL pushbuttons.

When executing a manual loopback session using the MODE and SEL pushbuttons:

•

The next loopback option can be displayed by pressing the MODE pushbutton, however, the

previously activated loopback remains active until the SEL 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 sessions continue until the loopback times out in accordance with the

LBTO setting.

•

If there is an active loopback, pressing the MODE and SEL 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 SEL pushbuttons on the front panel for at least 3 seconds. The following message

appears on the front-panel display:

MAN LPBK NLO? (XXXXindicates loopback choices)

Press SEL to activate NLOC. The display changes to MAN LPBK NLOC.

Press MODE to advance to the next available loopback:

•

NDx? = Doubler 1 or Doubler 2, if H4D is available

NRE? = NREM

CRE? = CREM

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LTPH-UM-1031-03, Issue 3

Testing

•

CDx? = Doubler 1 or Doubler 2, if H4D is available

CLO? = CLOC

COL? = Dual loopback at H4TU-C

DxL? = Dual loopback at Doubler 1 or Doubler 2, if available

RUL? = Dual loopback at H4TU-R

Press SEL 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 returns to the normal display mode.

You can terminate loopbacks manually and exit the MAN LPBKmode by simultaneously pressing the MODE and

SEL pushbuttons for 3 or more seconds. If no loopback is active, the MAN LPBKmode automatically terminates

after 30 seconds.

All loopbacks can be initiated by inband commands in the DS1 payload or by a command from the HDSL4 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 or PL adjacent to the identified loopback. For example, NREM-HG indicates that the loopback was initiated

by the HDSL4 system.

SMJK loopback commands are only activated by inband commands.

LOOPBACK TEST PROCEDURES

The following sections provide step-by-step test procedures for verifying the integrity of the HDSL4 channels at

every module location as well as the DS1 channels to the customer and the local DSX-1 interface. Figure 29 on

page 50 summarizes the available loopbacks in the system.

General Troubleshooting Tips

If trouble is encountered on the DSX-1 interface of the H4TU-C, verify that the:

•

H4TU-C is making a positive connection with its shelf connector.

H4TU-C internal equalizer is set to the correct distance range per Table 5 on page 19. 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 (BRG) jacks and another between the two

LINE jacks splits the IN and OUT and creates metallic loopbacks towards both the DSX-1 and the H4TU-C-319.

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 towards the DSX-1.

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Testing

LTPH-UM-1031-03, Issue 3

Loopbacks Toward Network

TLOS*

HRU-412

HDSL4 SPAN

H4HTLUU-C

All ones

LOGIC

HRU-412

H4TU-R

SMJK*

HRU-412

2-in-5

11000 HRU-412

H4TU-C

HLU

HDSL4 SPAN

H4TU-R

FF02

C742 ‡

NREM*

HRU-412

3 in 7

1110000 H3R-inU--7412

H4TU-C

HLU

All ones

HRU-412

H4TU-R

FF04

C741 ‡

FF06

C754 ‡

NDU2

C D U 1

NDU1C D U 1

2-in-6

3-in-6

4 i n 6

SPAN 3

1110001 1 1 1 0 0

4 i n 6

1100001 1 1 1 0 0

H4TU-C

SPAN 4

SPAN 2

SPAN 1

H4TU-R

CLOC

H4D1

H4D2

H D U - 4 0 9

FF1E

D3D3 ‡

NLOC

1111000

HRU-412

H4TU-R

5 IN 7

All ones

4-in-7

HLU

HDSL4 SPAN

H4TU-C

HRU-412

3F1E

D3D3 ‡

Loopbacks Toward Customer

CREM

1111110

HDSL4 SPAN

All ones

HLU

6-in-7

H4TU-R

CLOC

H4TU-C

3F02

C742 ‡

HRU-412

5-5inIN-77

1111100

HDSL4 SPAN

HLU

H4TU-C

HHR4UTU-4-1R2

3F04

C741 ‡

3F06

C754 ‡

CDU1

4-in-6

111100

H4D1

CDU2

5-in-6

111110

H4D2

H4TU-R

SPAN 1

SPAN 2

SPAN 3

HLU

H4TU-C

Bidirectional (Dual) Loopbacks

H4TU-R

RULB

H4D1

H4D2

H4TU-C

HLU

COLB

D1LB

D2LB

* Set the NLBP option to AIS to send AIS (indicated by an all ones pattern) for any network loopback.

A3LB loopback codes.

‡ A5LB loopback codes.

GNLB loopback codes.

Figure 29. Loopback Modes

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LTPH-UM-1031-03, Issue 3

Testing

GNLB Test Procedures

Figure 29 on page 50 is a graphical representation of the various loopback configurations with the associated

GNLB commands shown. Refer to Table 16 for a description of these commands.

Table 16. Summary of HDSL4 Loopback and Activation Codes

Method of Activation

Loopback

Code

Description

Test Set

Craft Port

MODE/SEL

NLOC

1111000

4-in-7

DSX-1 signal is looped back to the network at

the H4TU-C.

NREM

NDU1

CDU1

NDU2

CDU2

1110000

3-in-7

DSX-1 signal is looped back to the network at

the H4TU-R.

110000

2-in-6

Signal is looped back to the network at H4D1.

111100

4-in-6

DS1 signal from customer is looped back to the

customer at H4D1.

111000

3-in-6

Signal is looped back to the network at H4D2.

111110

5-in-6

DS1 signal from customer is looped back tot he

customer at H4D2.

D1LB

D2LB

CLOC

Dual loopback at H4D1.

Dual loopback at H4D2.

1111100

5-in-7

DS1 signal from the customer is looped back to

the customer at the H4TU-R.

CREM

COLB

1111110

6-in-7

DS1 signal from the customer is looped back to

the customer at the H4TU-C.

Dual loopback at the H4TU-C. DSX-1 signal is

looped back to the network at the H4TU-C and

DS1 signal from the customer is looped back to

the customer at the H4TU-C.

RULB

Dual loopback at the H4TU-R. DSX-1 signal is

looped back to the network at the H4TU-R and

DS1 signal from the customer is looped back to

the customer at the H4TU-R.

SMJK LpUp

(PL)

11000

2-in-5

SmartJack Loopup or NID payload (PL) code.

Invokes H4TU-R loopback towards network.

SMJK LpUp

(ESF-DL)

1111-1111- SmartJack Loopup or NID (ESF-DL) code.

0100-1000

Invokes H4TU-R loopback towards network.

SMJK LpDn

(PL)

11100

3-in-5

SmartJack Loopdown or NID payload (PL) code.

Removes SMJK, NLOC, NREM, CLOC, and

CREM.

SMJK LpDn

(ESF-DL)

1111-1111- SmartJack Loopdown or NID (ESF-DL) code.

0010-0100

Removes SMJK, NLOC, NREM, CLOC, and

CREM.

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Testing

LTPH-UM-1031-03, Issue 3

To perform the GNLB loopback test procedure:

Have the CO tester send the NREM (3-in-7) inband loopup code for 5 seconds. You should 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 towards the H4TU-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) inband loopdown code.

Have the CO tester send the NLOC (4-in-7) inband loopup for 5 seconds. You should 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.

A3LB Test Procedure

The H4TU-C-319 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 H4TU-C to enter the NLOC state. The

Loopback Time-Out setting (see “Setting the Loopback Time-Out Option (LBTO)” on page 48) 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 H4TU-C down is to

issue one of the three loopdown commands listed in Table 17. The automatic time-out mode is restored during

subsequent loopback sessions.

Table 17 summarizes the codes required to execute an A3LB Addressable Repeater Loopback command. All code

sequences must be present for at least 5 seconds.

Table 17. A3LB Addressable Repeater Loopback Commands

Name

Binary Code ^(a)(Hexadecimal Equivalent)

Description

NLOC

1111-1111-0001-1110 (FF1E)

0011-1111-0001-1110 (3F1E)

1111-1111-0000-0010 (FF02)

1111-1111-0000-0100 (FF04)

0011-1111-0000-0100 (3F04)

1111-1111-0000-0110 (FF06)

0011-1111-0000-0110 (3F06)

H4TU-C loopup from NI.

CREM

NREM

NDU1

H4TU-C loopup from CI.

H4TU-R loopup from NI.

Signal is looped back to the network at H4D1.

DS1 signal from customer is looped back to the customer at H4D1.

Signal is looped back to the network at H4D2.

DS1 signal from customer is looped back tot he customer at H4D2.

Dual loopback at H4D1.

CDU1

NDU2

CDU2

D1LB

D2LB

Dual loopback at H4D2.

CLOC

0011-1111-0000-0010 (3F02)

11000-11000-11000 ...

100000 100000 100000 ...

1111-1111-0100-1000 (FF48)

11100-11100-11100 ...

100-100-100 ...

H4TU-R loopup from CI.

SMJK

H4TU-R loopup from NI.

SMJK

H4TU-R loopup from NI.

SMJK

H4TU-R loopup from NI (ESF-DL).

H4TU-C and H4TU-R loopdown from NI OR CI.

H4TU-C and H4TU-R loopdown from NI OR CI (ESF-DL).

Loopdown

1111-1111-0010-0100 (FF24)

(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 arming and loopback sequence can also be initiated at the remote H4TU-R location.

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LTPH-UM-1031-03, Issue 3

Testing

A5LB Test Procedure

Using the codes listed in Table 18, 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.

Table 18. A5LB Addressable Repeater Loopback Commands

Name

Binary Code^(a)(Hexadecimal Equivalent) Description

ARMING or NI LPBK (inband)

11000-11000 ...

Arming code

ARMING or NI LPBK (ESF Data Link)

IR LPDN or DISARM (inband)

1111-1111-0100-1000 (FF48)

11100-11100 ...

Arming code

Disarming code

H4TU-C loopup

IR LPDN or DISARM (ESF Data Link)

1111-1111-0010-0100 (FF24)

1101-0011-1101-0011 (D3D3)

IOR LPBK (NLOC or CREM)

230-232 bit errors

229-231 bit errors^(b)

ILR-1 LPBK

1100-0111-0100-0001 (C741)

1100-0111-0101-0100 (C754)

1100-0111-0100-0010 (C742)

Doubler-1 loopup

(NDU1 and CDU1 10 bit errors)

ILR-20 LPBK

(NDU2 and CDU2 200 bit errors)

Doubler-2 loopup

ILR-2 LPBK

(NREM and CLOC 20 bit errors)

H4TU-R loopup

ILR-2 LPBK (NREM or CLOC)

20 bit errors ^(c)

NREM—DSX-1 signal is looped back to

the network at the H4TU-R.

CLOC—DS1 signal from customer is

looped back to the customer at the

H4TU-R.

1100-0111-0100-0010 (C742)

IR LPDN

1001-0011-1001-0011 (9393)

1101-0101-1101-0101 (D5D5)

1101-0101-1110-1010 (D5EA)

1101-0101-1101-0110 (D5D6)

0110-0111-0110-0111 (6767)

Loopdown (H4TU-C or H4TU-R)

Query loopback

IR QUERY LPBK

IR ALTERNATE QUERY LPBK

TIME-OUT OVERRIDE

IOR POWER DOWN (H4TU-C) ^(d)

Alternate query loopback

Loopback time-out override

Removes HDSL4 line power

(a) The leftmost bit arrives first in all sequences. The detection algorithm functions reliably with a random 10^-3BER on the facility.

The entire arming and loopback sequence can also be initiated at the remote H4TU-R location.

(b) The H4TU-R identifies CREM (and the H4TU-C identifies NLOC) with 231 bit errors, including 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 H4TU-R and H4TU-C generate this bit pattern in a series of discontinuous bursts containing 20-bit

errors each, including frame bits. Those test sets that do not count frame error bits as data bit errors will indicate fewer bits

than the H4TU-R and H4TU-C transmit for a CI and NI loopback.

(d) The IOR Power Down code must remain present for the duration of the power down mode. When this code is removed, the

system returns to its normal unlooped and unarmed state.

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Testing

LTPH-UM-1031-03, Issue 3

To perform the A5LB test procedures:

Send the inband Arming and NI LPBK code 11000 to the H4TU-C for at least 5 seconds.

Monitor the output of the H4TU-C for the return of the pattern. Return of the pattern indicates one of the

following:

•

The H4TU-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 H4TU-C and

H4TU-R have been armed.

Verify, if possible, that the H4TU-R Loopback LED is either flashing yellow at four times per second

(indicating that the system is armed), or is a steady yellow (indicating that it is both armed and in SMJK

loopback). The H4TU-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 H4TU-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 in the order presented:

•

2 seconds of AIS (all ones pattern)

2 seconds of returning data pattern

231 logic errors (including the frame bit) occurring in the returned pattern comprising:

—

10 errors, if ILR-1 (Doubler 1) was sent

200 errors, if ILR-20 (Doubler 2) was sent

20 errors, if ILR-2 (H4TU-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 H4TU-C-319 is set to the Auto framing mode. To improve compatibility

with those test sets, the H4TU-C generates 231 (NLOC and CREM) ID bit errors. As a result, the

H4TU-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 H4TU-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 (LBTO)” on page 48). 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 H4TU-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 inband code 11100 or the ESF-DL code (FF24).

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LTPH-UM-1031-03, Issue 3

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 (universal

loopdown).

•

If all the equipment is to be looped down, disarmed and returned to normal operation, send the disarm

inband 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.

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Testing

LTPH-UM-1031-03, Issue 3

TESTING WITH H4TU-C BERT GENERATOR

The H4TU-C BERT Generator screen allows transmission of an unframed test signal from the H4TU-C toward

either the CI or the network.

It is not recommended using the Bit Error Rate Tester from the remote and line unit at the same

time.

Press C to select the Config menu (Figure 30).

Use the and arrow keys to select BERT Generator, then press ENTER .

↑

↓

Use the arrow keys to select an option and press the SPACEBAR to cycle through the settings. Refer to

Table 19 for a list of BERT generator option settings.

Press ENTER to activate your choice.

←

To view BERT status, press ^ESCtwice, then use the arrow key to select the Monitor menu.

Press ENTER . You can exit the status screen while signal generation is active.

Monitor Performance Event Log Config Inventory Report Rlogon

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

Help

| Standard Options -> |

| ADC Options

| BERT Generator

-> |

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

| BERT Signal Generator : ENA

| BERT Signal Pattern

| BERT Signal Linecode

: 1 in 8

: AMI

| BERT Signal Direction : NET only

| BERT Interval

: Continuous |

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

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

ID: xxxx—-xxxx—-xxxx--xxxx

02/01/2002 12:30:01

H4TU-C

System: OK___

Figure 30. H4TU-C BERT Generator Screen

Table 19. BERT Signal Generator Option Settings

Option

Description

BERT Signal Generator

BERT Signal Pattern

Enabled (ENA) or Disabled (DIS)

1-in-8 pattern, 2-in-8 pattern, 3-in-24 pattern, 2^23-1pseudo random,

2^20-1pseudo random, 2^15-1pseudo random

BERT Signal Linecode

BERT Signal Direction

BERT Interval

AMI or B8ZS

Toward CPE or toward NET

5 minutes, 60 minutes, Continuous (default)

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LTPH-UM-1031-03, Issue 3

Testing

TESTING WITH H4TU-R BERT GENERATOR

The H4TU-R BERT Generator screen allows transmission of an unframed test signal from the H4TU-R towards

either the network (NET) or customer (CPE). Bit error rates are calculated and display on the Monitor screen.

Press R to logon remotely, then press C to select the Config menu (Figure 31).

Use the and arrow keys to select BERT Generator, then press ENTER .

↑

↓

Use the arrow keys to select an option, then press the SPACEBAR to cycle through the settings. Refer to

Table 19 on page 56 for a list of BERT Generator option settings.

Press ENTER to activate your choice.

←

To view BERT status, press ^ESCtwice, then, using the arrow key to select the Monitor menu, press

ENTER .

Press R to return to the H4TU-C logon screen. You can exit the status screen while signal generation is active.

Monitor Performance Event Log Config Inventory Report Rlogon

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

Help

| Standard Options -> |

| ADC Options

| BERT Generator

-> |

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

| BERT Signal Generator : ENA

| BERT Signal Pattern

| BERT Signal Linecode

: 1 in 8

: AMI

| BERT Signal Direction : NET only

| BERT Interval

: Continuous |

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

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

ID: xxxx—-xxxx—-xxxx--xxxx

02/01/2002 12:30:01

H4TU-R

System: OK___

Figure 31. H4TU-R BERT Generator Screen

The test pattern is sent out either from the line unit towards the network (toward NET) or from

the remote unit towards the customer (toward CPE). Both test payloads must be looped back so

they can be returned to the unit for BER detection. BER detection is performed in the line unit

for both switch settings.

Tests done towards the NET must be looped at some point external to the higher circuit. Tests

done towards the CPE can either be looped back at some external point beyond the remote unit,

or they can be looped back internally by a higher loopback, such as NREM. The test payload,

for the CPE direction, also passes back and forth over the HDSL4 link to the H4TU-C before it is

analyzed for errors.

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Appendix A - Specifications

LTPH-UM-1031-03, Issue 3

APPENDIX A - SPECIFICATIONS

Power

Line Voltage

CO Supply

0, -185 Vdc, 123 Vdc (Voltage is applied across Loop 1 and Loop 2.)

-48 Vdc nominal (-42.5 Vdc to -56.5 Vdc)

See “Power Consumption” and “Maximum Power Dissipation” and “Maximum

Current Drain” on page 61.

Electrical Protection

Secondary surge and power cross-protection on HDSL4 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)

Depth

10 in. (25.4 cm)

Weight

Mounting

0.5 lb. (0.23 kg)

3192 high-density mechanics shelf

HDSL4

Line Code

784 kbps Overlapped Pulse Amplitude Modulation (OPAM) transmission per pair per

HDSL4 standard in ANSI T1.418 Issue 2

Transmission

CSA Reach

Full duplex

34 kft. maximum using 26 AWG wire: 12kft. (span 1), 11 kft. (span 2), 11 kft. (span 3)

Media

One non-loaded, copper, four-wire cable pair

+14.1 dBm 0.5 dBm at 135Ω

135Ω

Output

Line Impedance

Maximum Insertion Loss

Span 1 = 47 dB at 196 kHz

Span 2 and Span 3 = 43 dB at 196 kHz

Maximum Loop Attenuation

Span 1 = 31 dB

Span 2 and Span 3 = 29 dB

Start-Up Time

30 sec. (typical), 1 min. (maximum)

DSX-1

Line Impedance

Line Rate

100Ω

1.544 Mbps 200 bps

Line Format

Frame Format

Pulse Output

Input Level

Alternate Mark Inversion (AMI) or Bipolar with 8-Zero Substitution (B8ZS)

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

6 V^pk-pkpre-equalized for 0 to 655 feet of ABAM cable

+1.5 to -7.5 dB DSX

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LTPH-UM-1031-03, Issue 3

Appendix A - Specifications

System

One-way DS1 Delay

<700 µs

Wander (Looped)

Meets MTIE T1.101 requirements

0.2 UI maximum

Wideband Jitter (Looped)

Narrowband Jitter (Looped)

0.1 UI maximum

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Appendix A - Specifications

LTPH-UM-1031-03, Issue 3

POWER CONSUMPTION

The three most important power parameters of an H4TU-C are its maximum power consumption, maximum

power dissipation, and maximum current drain.

Table 20 describes line-powered and locally powered (remote) circuits on the maximum reach condition (34 kft.)

using 26 AWG wire.

Table 20. H4TU-C Power Parameters

-48 Vdc Power Consumption

Heat Dissipation (Watts)

-42.5 Vdc Current (mA)

(Watts)

Number of Remote Power

Typical

Maximum

Typical

Maximum

Typical

Maximum

Doublers

Source

None

Locally powered

Line-powered

Locally powered

Line-powered

Locally powered

Line-powered

7.6

8.4

5.9

6.2

6.6

7.1

8.4

9.3

6.4

6.8

7.2

7.8

9.2

10.3

179

259

344

471

628

774

197

285

378

518

691

852

None

11.0

14.6

20.0

26.7

32.9

12.1

16.1

22.0

29.4

36.2

MAXIMUM POWER DISSIPATION

The maximum power dissipation measures the power converted into heat which 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. Use this limit and the parameters in Table 21 on page 61 to

determine the maximum number of H4TU-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 H4TU-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 H4TU-C consumes or draws from the shelf

power source. This parameter is needed when the H4TU-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 21 to perform this analysis.

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LTPH-UM-1031-03, Issue 3

Appendix A - Specifications

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 21 to

determine the shelf fusing requirements for your particular H4TU-C applications.

LOOP ATTENUATION, INSERTION LOSS, AND REACH

For Span 1, each loop has no more than 47 dB of insertion loss at 196 kHz, with driving and terminating

impedances of 135Ω, as shown in Table 21 below. This is equivalent to no more than 34 dB loop attenuation.

For Span 2 and Span 3, each loop has no more than 43 dB of insertion loss at 196 kHz, with driving and

terminating impedances of 135Ω. This is equivalent to no more than 31 dB loop attenuation.

Table 21. HDSL4 Reach Chart

Insertion Loss ^(a)at Loop Attenuation

Maximum Reach (kft) Maximum Reach (kft)

Cable Gauge

Ω per kft

196 kHz (dB/kft)

(dB/kft)

Span 1

Span 2 and Span 3

26/0.4 mm

24/0.51 mm

22/0.61 mm

19/0.91 mm

3.88

2.84

2.18

1.54

2.8

2.0

1.6

1.1

11.0

15.0

20.6

27.8

(a) Insertion Loss = 1.38 times loop attenuation

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Appendix A - Specifications

LTPH-UM-1031-03, Issue 3

H4TU-C-319 CARD-EDGE CONNECTOR

Figure 32 shows the card-edge connectors on the H4TU-C-319. Active pins are highlighted in black.

(IN)DSX-1Tip

DSX-1Ring(IN)

DSX-1Ring1(OUT)

(OUT)DSX-1Tip1

GND

HDSL4-L1Ring

HDSL4-L1Tip

SystemAlarm**

Frame GND

ManagementBus**

-48 Vdc

HDSL4-L2Tip

HDSL4-L2Ring

Fuse Alarm*

(Do not use)

* Fuse Alarm

Normal = Floating (0 to -60 Vdc maximum)

Activated = -48 Vdc (10 mA maximum)

** System Alarm and Management Bus (reserved)

Figure 32. H4TU-C-319 Card-Edge Connector

Network Management Control Bus

The H4TU-C provides a Network Management Control Bus on pin 7 of the card-edge connector. This allows the

various Management System protocols to manage the H4TU-C through the HMU-319. Whenever the H4TU-C is

under management, the MNGDmessage displays periodically on the front-panel display.

Some H4TU-C-319 features are affected when it is under management. Consult the management

unit practice for further information (see “Appendix D - Product Support” on page 66).

Fuse Alarm

Pin 10 on the card-edge connector is a Fuse Alarm that is driven to -48 Vdc 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 V. It can sink a current of 10 mA. The H4TU-C does not support the BPV function (Pin E) of normal HD

repeaters.

September 12, 2003

H4TU-C-319 List 1

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LTPH-UM-1031-03, Issue 3

Appendix A - Specifications

System Alarm Output Pin

Pin H on the card-edge connector (see Figure 33 on page 63) is the H4TU-C-319 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 H4TU-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 minor alarm

(MNRALM).

•

The H4TU-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.

Pin H must never be taken above +5 Vdc or below -60 Vdc.

CRAFT PORT

Figure 33 shows the pinout for the craft port connection and its connection to a DB-9 or DB-25 connector on a

maintenance terminal.

Terminal

DB-9 Connector

(DTE)

H4TU-C-319

DB-9 Connector

(DCE)

TD (Transmit Data)

RD (Receive Data)

GND

Terminal

DB-25 Connector

(DTE)

Figure 33. RS-232 Craft Port Pinouts

H4TU-C-319 List 1

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Appendix B - Functional Operation

LTPH-UM-1031-03, Issue 3

APPENDIX B - FUNCTIONAL OPERATION

HDSL4 technology provides full-duplex services at standard T1 rates over two pairs of copper wire between an

H4TU-C, H4Ds (if necessary), and an H4TU-R which comprise one ADC system. ADC systems use Overlapped

Pulse Amplitude Modulation Transmission (OPAM) transceiver systems to establish two, full-duplex, 784 kbps

data channels between the H4TU-C-319 and a remotely located H4TU-R.

A block diagram of the H4TU-C-319 is shown in Figure 34. The H4TU-C-319 receives a 1.544 Mbps DSX-1 data

stream from the DSX-1 digital cross-connect interface. The H4TU-C-319 contains a DS1 frame synchronizer

controlled by an 8-bit microprocessor that determines the type of framing on the DS1 stream and synchronizes

with it. The H4TU-C-319 recognizes Superframe (SF), including D4, or Extended Superframe (ESF) framing.

When the data is unframed, the H4TU-C-319 arbitrarily defines a frame bit.

Tip

DSX-1

XMT

Ring

Tip

HDSL

XCVR

BRG

LINE

HDSL4-L1

Ring

Fuse

Alarm

MUX

-185 Vdcor+/-123Vdc

PowerSupply

BAT8

Framer

Power

Supply

(GroundIsolated

DEMUX

andGroundFaultDetect)

GND5

NetworkManagement 7

FrameGND J

MODESEL(ACO)

Tip

SystemAlarm H

HDSL

XCVR

HDSL4-L2

Pre-equalizer

Select

LINE

BRG

Ring

Microprocessor

Status

RS-232

Tip

DSX-1

Ring

RCV

Figure 34. H4TU-C-319 List 1 Block Diagram

TIMING

The low-loop wander (0.5 UI max) of an H4TU-C, when used with remote units, allows the circuit to be used in

all critical timing applications, including those used to transport Stratum 1 timing.

GROUND FAULT DETECTION

The H4TU-C has a Ground Fault Detection (GFD) circuit which detects a ground or a resistive path to ground on

any wire of the HDSL4 loop. This makes the product compliant with the Class A2 requirements of GR-1089.

SPECTRUM ISSUES

The asymmetric 776 kbps spectrum, defined in ANSI T1.418 Issue 2, allows the HDSL4 product to be spectrally

compatible with ADSL services in adjacent pairs in the same binding groups for all non-doubler applications. A

combination of asymmetric and symmetric spectrums is used for ADSL compatibility in doubler applications.

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LTPH-UM-1031-03, Issue 3

Appendix C - Compatibility

APPENDIX C - COMPATIBILITY

The HDSL4 system uses HDSL4 transmission technology as recommended by ANSI committee in compliance

with the August 1999 T1-E1.4/99-006R5 HDSL4 standards.

The H4TU-C List 1 is designed to mount in the following shelves with 3192 mechanics:

•

HMS-317 (28-slot, 23-inch shelf)

HMS-318 (22-slot, 19-inch shelf)

HMS-357 (28-slot, 23-inch shelf)

HMS-358 (28-slot, 23-inch shelf)

HHS-319 (3-slot, 19-inch horizontal shelf)

HCS-402 (2-slot) with a 150-1192-01 adaptor

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 H4TU-C-319 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 H4TU-C-319.

H4TU-C-319 List 1

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Appendix D - Product Support

LTPH-UM-1031-03, Issue 3

APPENDIX D - PRODUCT SUPPORT

ADC Customer Service Group provides expert pre-sales and post-sales support and training for all its products.

Technical support is available 24 hours a day, 7 days a week by contacting the ADC Technical Assistance Center.

•

Quotation Proposals

Sales Assistance

800.366.3891

Ordering and Delivery

General Product Information

Complete Solutions (from concept to

installation)

Systems Integration

800.366.3891

•

Network Design and Integration Testing

System Turn-Up and Testing

Network Monitoring (upstream or downstream)

Power Monitoring and Remote Surveillance

Service/Maintenance Agreements

Systems Operation

Technical Information

ADC Technical Assistance Center

800.638.0031

Email: [email protected]

System/Network Configuration

Product Specification and Application

Training (product-specific)

Installation and Operation Assistance

Troubleshooting and Repair/Field Assistance

www.adc.com/Knowledge_Base/index.jsp

Online Technical Support

•

www.adc.com/documentationlibrary/technicalpu

blications/

ADC Return Material Authorization (RMA)

number and instructions must be obtained

before returning products.

Online Technical Publications

Product Return Department

800.366.3891

Email: [email protected]

All telephone numbers with an 800 prefix are tool-free in the USA and Canada.

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LTPH-UM-1031-03, Issue 3

Appendix E - Abbreviations

APPENDIX E - ABBREVIATIONS

ACO:

Alarm Cutoff

DBER: DS1 Bit Error Rate

ADSL: Asymmetyric Digital Subscriber Line

AIS: Alarm Indication Signal

DDS:

DL:

Digital Data Service

Data Link

ALM: Alarm

DLC:

DS1:

Digital Loop Carrier

Digital Signal, Level 1

ALMP: Alarm Pattern

AMI:

AOR:

Alternate Mark Inversion

Addressable Office Repeater

DSX-1: Digital Signal Cross-Connect, Level 1

ARM: Armed

ECI:

Equipment Catalog Item

Equalization

ASCII: American Standard Code for Information Interchange

AWG: American Wire Gauge

EQL:

ESD:

ESF:

Electrostatic Discharge

Extended SuperFrame

B8ZS: Bipolar with 8-Zero Substitution

ES-L: Errored Seconds - Line

ES-P: Errored Seconds - Path

BER:

BERT: Bit Error Rate Tester

BPV: Bipolar Violation

BPVT: Bipolar Violation Transparency

Bit Error Rate

FE:

Far End

FRMG: Framing

BRG:

Bridge

H4TU-C: HDSL4 Line Unit

CEV:

CI:

Controlled Environmental Vault

Customer Installation

H4TU-R: HDSL4 Remote Unit

HBER: HDSL4 Block Error Rate

HCDS: High Capacity Digital Service

HDSL: High-bit-rate Digital Subscriber Line

CLEI: Common Language Equipment Identifier

CLOC: Customer Local Loopback

CO:

Central Office

HG:

HDSL Generic

COLB: Central Office Loopback

HMU: HiGain Management Unit

CPE:

CRC:

Customer Premises Equipment

Cyclical Redundancy Check

CREM: Customer Remote Loopback

ID:

Identification

CSA:

CV:

Carrier Service Area

Code Violation

ILR:

IN:

Intelligent Repeater Loop

Transmit

CV-L: Code Violation - Line

CV-P: Code Violation - Path

INSL: Insertion Loss

IOR:

Intelligent Office Repeater

H4TU-C-319 List 1

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Appendix E - Abbreviations

LTPH-UM-1031-03, Issue 3

PRM: Performance Report Messaging

PRM-FE: Performance Report Messaging - Far End

PRM-NE: Performance Report Messaging - Near End

PWRF: Power Feed

LA:

Loop Attenutation

LAIS: Line Alarm Indication Signal

LATT: Loop Attenuation

LBPV: Local Bipolar Violation

LBTO: Loopback Timeout

RAI:

Remote Alarm Indication

LED:

LLOS: Line (Unit) Loss of Signal

LOF: Loss of Frame

Light Emitting Diode

RAI-CI: Remote Alarm Indication - Customer Installation

RAIS: Remote Alarm Indication Signal

RDA:

Remote Disconnect Alarm

LOSW: Loss of Sync Word

LPDN: Loopdown

RLOS: Remote (Unit) Loss of Signal

RRAI: Remote RAI

LPF:

Line Power Feed

RTPV: Remote Provisioning

RULB: Remote Unit Loopback

LRAI: Line (Clear) Remote Alarm Indication

HDSL4 Margin

S/N:

SDSL: Symmetrical Digital Subscriber Line

SES: Severely Errored Seconds

Signal-to-Noise Ratio

MAL: Margin Alarm

MARG: Margin

MNGD: Managed

SES-L: Severely Errored Seconds - Line

SES-P: Severely Errored Seconds - Path

MSEC: Monitored Seconds

SF:

SuperFrame

SMJK: SmartJack

NE:

NI:

Near End

Network Interface

Network Interface Device

NID:

TLOS: Transmit Loss of Signal

NLBP: Network Loopback Pattern

NLOC: Network Local Loopback

NMA: Network Management and Administration

NREM: Network Remote Loopback

UAS : Unavailable Seconds

UAS-L: Unavailable Seconds - Line

UAS-P: Unavailable Seconds - Path

UNFR: Unframed

OPAM: Overlapped Pulse Amplitude Modulation

OUT:

Receive

PBOC: Power Back Off - Customer

PBON: Power Back Off - Network

PL:

Payload

POTS: Plain Old Telephone Service

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H4TU-C-319 List 1

LTPH-UM-1031-03, Issue 3

Appendix E - Abbreviations

H4TU-C-319 List 1

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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 H4TU-C-319 List 1 has been tested and verified to comply with the applicable sections of the following safety standards:

•

GR 63-CORE - Network Equipment-Building System (NEBS) Requirements

GR 1089-CORE - Electromagnetic Compatibility and Electrical Safety

Binational standard, UL-60950/CSA-C22.2 No. 60950-00: Safety of Information Technology Equipment

For technical assistance, refer to “Appendix D - Product Support” on page 66.

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World Headquarters

ADC Telecommunications, Inc.

PO Box 1101

Minneapolis, Minnesota USA 55440-1101

For Technical Assistance

Tel: 800.366.3891

ISO 9001/TL 9000

DOCUMENT: LTPH-UM-1031-03, ISSUE 3

DNV Certification, Inc.

´,j6¶9@¨

REGISTERED FIRM

1274229

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