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DSP9612RM Flash Poll
Rack-Mount Modem
User’s Guide
0049−0519−000 Rev. A
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Contents
CHAPTER 1 INTRODUCTION .........................................................5
FEATURES ................................................................................................6
APPLICATIONS .........................................................................................7
ANCILLARY DOCUMENTATION ................................................................7
CHAPTER 2 INSTALLATION ..........................................................9
UNPACKING YOUR HARDWARE...............................................................9
ADDITIONAL ITEMS YOU NEED ...............................................................9
HARDWARE OVERVIEW .........................................................................10
Front View.........................................................................................10
Component View ...............................................................................11
INSTALLATION SUMMARY .....................................................................12
CONFIGURING THE MODEM ...................................................................12
High-Speed (Fast Poll) Mode ...........................................................12
Low-Speed (FSK) Mode....................................................................18
INSTALLING THE MODEM IN THE UNIVERSAL DATA SHELF...................23
CONNECTING TO A TRANSMISSION LINE................................................25
Modular Jack Connectors.................................................................25
Mass Termination Connector............................................................26
CONNECTING AN RS-232 DEVICE..........................................................26
LEDS .....................................................................................................27
LOOPBACK CONTROL SWITCH...............................................................28
APPENDIX A, TROUBLESHOOTING...........................................29
PROBLEM SOLVING................................................................................29
APPENDIX B, SPECIFICATIONS ..................................................31
GENERAL SPECIFICATIONS ....................................................................31
MECHANICAL SPECIFICATIONS..............................................................32
BACK-TO-BACK CONNECTIONS TO A SECOND MODEM.........................33
RS-232 (RTU) Interface ....................................................................33
ENVIRONMENTAL SPECIFICATIONS........................................................34
COMPLIANCES........................................................................................34
APPENDIX C, LIMITED PRODUCT WARRANTY.....................35
APPENDIX D, RMA PROCEDURE ................................................36
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Contents
NOTES
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Chapter 1
Introduction
ongratulations for purchasing the finest industrial-grade fast-
poll rack-mount modem available.
C
The Telenetics DSP9612RM (Flash Poll) modem is a
9600/4800/0-1800 bps rack-mount modem designed for 4-wire, full-
duplex or 2-wire, half-duplex operation over a voice-band leased line.
The modem is designed utilizing the latest digital-signal processing
(DSP) technology to achieve high performance. The modem employs
Telenetics’ proprietary modulation and encoding scheme to achieve fast
modem training time. It is also backward compatible with Bell 202
modems.
The modem can be installed in either a Telenetics or a Motorola/UDS
RM16M Universal Data Shelf. The modem occupies only one rack
slot, eliminating the hassle of equipment trays and power bricks
required for “Plastic Box” modems. The modem is powered from the
Universal Data Shelf.
The DSP9612RM modem is ideally suited for multi-point
communication systems that require fast response time, short training
time, and low throughput delay. The DSP9612RM is the most
technologically advanced rack-mount modem on the market.
This User’s Guide is designed to let you get your modem “up and
running” as quickly as possible. It contains all the information you need
to install and configure your modem. It also contains troubleshooting
information in the unlikely event you encounter a problem with your
modem.
Page 5
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Introduction
Features
Though functionally similar to commercial modems, the DSP9612RM
provides the following unique features that make it well suited for
utility and industrial applications.
™
™
™
Requires only one rack slot in a Telenetics or a Motorola/UDS
RM16M Universal Data Shelf.
Operates over voice-band conditioned or unconditioned leased line
and pilot wires.
Operates without human intervention, making it ideal for
unmanned locations.
™
™
Works within an extended temperature range of -40ºC to +85ºC.
Designed with coupling transformers for high-voltage isolation and
common mode noise rejection in industrial and commercial
environments.
™
™
™
Asynchronous data rates (selectable) of 9600, 4800, and 0-1800
bps.
Easily accessible DIP switches for user configuration and option
selection.
Local analog, local digital, and remote digital loopback
diagnostics.
Page 6
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Applications
Applications
The DSP9612RM modem is designed for point-to-point and multipoint
data communications. Figure 1-1 shows a typical multipoint
configuration.
Figure 1-1. Network of Multipoint Configuration
There are a number of factors that can affect the network’s and
modem’s operation and performance. These include:
™
™
™
™
™
Operating speed
2-wire or 4-wire configuration
Transmission line characteristics, noise, and line impairments
Network configuration (point-to-point or multipoint)
Number of nodes on the network
Ancillary Documentation
For information about the Telenetics RM16M Universal Data Shelf,
refer to the Telenetics RM16M Installation and Operation Manual for
the Universal Data Shelf version you have.
Page 7
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Introduction
NOTES
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Chapter 2
Installation
his chapter describes how to install the modem.
Unpacking Your Hardware
Your package should include:
™
™
At least one DSP9612RM modem
This User’s Guide
If your package contents are damaged or missing, please contact your
place of purchase immediately.
Additional Items You Need
To use your modem, you need the following additional items:
™
™
A Telenetics or Motorola/UDS RM16M Universal Data Shelf
A two- or four-wire transmission line or leased line
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Installation
Hardware Overview
Front View
Figure 2-1 shows a front view of the DSP9612RM modem. Starting
from the top, this view shows:
™
™
A loopback test switch. See page 28.
A set of eight LEDs. See page 27.
Figure 2-1. Front View of Modem
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Hardware Overview
Component View
Figure 2-2 shows the component view of the modem. This view shows:
™
™
™
Two configuration switch blocks, designated SW1 and SW2. See
page 12.
Jumpers located in various positions on the modem. Do not change
or remove the straps from these jumpers.
Edge connectors at the back of the modem, which plug into the
backplane of a Telenetics or Motorola/UDS RM 16M Universal
Data Shelf.
Configuration
Switch Blocks
Edge Connectors
Switch Block SW2
Switch Block SW1
Figure 2-2. Component View of Modem
Page 11
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Installation
Installation Summary
The modem installation involves the following steps:
1. Configuring the modem. See the section below.
2. Connecting to a transmission line. See page 25.
3. Connecting an RS-232 device. See page 26.
Configuring the Modem
You configure the modem using the two sets of DIP switches on the
component side of the modem, near the center. The switches can have
one of two functions, depending on how switch SW2-1 is set.
™
Setting switch SW2-1 to OFF configures the modem for high-
speed (Fast Poll) mode. In this mode, the switches correspond to
the functions in Table 2-1 (see page 13).
™
Setting switch SW2-1 to ON configures the modem for low-speed
(FSK) mode. In this mode, the switches correspond to the functions
in Table 2-3 (see page 18).
The modem has several jumpers. Do not change or remove the
straps from the jumpers.
Note:
High-Speed (Fast Poll) Mode
Table 2-1 shows the modem switch settings that can be used when the
modem is configured for high-speed (Fast Poll) mode. This mode is
enabled when switch SW2-1 is set to OFF. Following this table is an
explanation of these settings.
Page 12
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Configuring the Modem
Table 2-1. Modem Switch Settings for High-Speed Mode
Switches
Switch Settings
OFF (Default)
ON
(see Table 2-2 on page 14)
SW 1-1 − 1-4: Transmit Level (page 14)
SW 1-5: Receiver Dynamic Range
(page 15)
−10 to −43 dBm +3 to −30 dBm
SW 1-6: TX Cable Equalizer (page 15) Enabled
SW 1-7: RX Cable Equalizer (page 15) Enabled
Disabled
Disabled
Inactive
SW 1-8: Anti-streaming (page 15)
Active
SW 2-1: High-Speed/Low-Speed Mode Low-Speed Mode High-Speed Mode
(page 16)
(FSK)
(Fast Poll)
9600 bps
10 bits
SW 2-2: Data Rate in Fast Poll Mode
SW 2-3: Async Character
SW 2-4: Auto RTS (page 16)
SW2-5: Reserved
4800 bps
11 bits
Enabled
Disabled
SW 2-6: Production Test Only (page 16) Test
Normal
SW 2-7: 2- or 4-wire (page 16)
2-wire, half-
4-wire, full-duplex
duplex
SW 2-8: Carrier Control (page 17)
SW 2-9: Rx Termination (page17)
SW 2-10: Ground Options (page 17)
Constant
Disabled
Switched
Enabled
Chassis Ground- Chassis Ground-
Signal Ground
Connected
Signal Ground
Disconnected
Page 13
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Installation
SW1-1 through SW1-4 − Transmit Level (high- & low-speed modes)
Switches SW1-1 through SW1-4 adjust the modem’s transmit level.
Table 2-2 shows the transmit levels you can select using these switches.
Table 2-2. Transmit Levels (High-Speed and Low-Speed Modes)
SW1 through SW4 Switch Settings
SW1-1
SW1-2
SW1-3
SW1-4
Transmit Level
0 dBm
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
OFF
OFF
OFF
OFF
ON
OFF
OFF
ON
OFF
ON
−1 dBm
−2 dBm
−3 dBm
−4 dBm
−5 dBm
−6 dBm
−7 dBm
−8 dBm
−9 dBm
−10 dBm
−11 dBm
−12 dBm
−13 dBm
−14 dBm
+3 dBm
OFF
ON
ON
OFF
OFF
ON
OFF
ON
ON
ON
OFF
ON
ON
ON
OFF
OFF
OFF
OFF
ON
OFF
OFF
ON
OFF
ON
ON
ON
OFF
ON
ON
ON
ON
OFF
OFF
ON
OFF
ON
ON
ON
ON
ON
OFF
ON
ON
ON
ON
Page 14
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Configuring the Modem
SW1-5 − Receiver Dynamic Range (high- & low-speed modes)
SW1-5
ON = −10 to −43 dBm
OFF = +3 to −30 dBm
For a low receive signal level, set SW1-5 to ON (−43 dBm ). For short
distances or to select a strong receive signal, set SW1-5 to OFF.
SW1-6 and SW1-7 − Cable Equalizer (high-speed mode only)
SW1-6 ON = Enable TX Cable Equalizer
OFF = Disable TX Cable Equalizer
SW1-7 ON = Enable RX Cable Equalizer
OFF = Disable RX Cable Equalizer
To improve or extend the modem’s polling performance, use the fixed
Compromise Cable Equalizer when polling on long metallic circuits.
The cable equalizer is active only when the modem is in high-speed
mode (SW2-1 set to OFF).
SW1-8 − Anti-streaming (high- & low-speed modes)
SW1-8 ON = Anti-streaming active
OFF = Anti-stream inactive
Typically, anti-streaming is used in multi-point applications to prevent
a malfunctioning slave modem from occupying the line indefinitely.
When anti-streaming is active, the modem can transmit data for a
maximum of 27 seconds before the transmitter turns off automatically.
The modem then looks for an ON-to-OFF Request To Send (RTS)
transition before proceeding with normal operation. Anti-streaming can
be selected in either high-speed or low-speed mode.
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Installation
SW2-1 − Fast Poll/FSK (high- & low-speed modes)
SW2-1 ON = Low-Speed Mode (FSK)
OFF = High-Speed Mode (Fast Poll)
SW2-1 configures the modem for either low-speed (FSK) mode or
high-speed (Fast Poll) mode. As a result, the SW2-1 setting you choose
determines the switch definitions for the other switches.
™
For high-speed mode, the configuration switches follow the
definitions in Table 2-1.
™
For low-speed mode, the configuration switches follow the
definitions in Table 2-3.
SW2-4 − Auto RTS (high-speed mode only)
SW2-4 ON = Enable Auto RTS
OFF = Disable Auto RTS
For data terminals that do not support hardware RTS, set SW2-4 to ON
to enable buffer mode. In this mode, TXD is detected at the modem and
internal RTS is turned ON. After training completes, the TXD is
transmitted to the remote modem. The transmitter turns off if no TXD is
detected after 1 character length of idle time.
SW2-6 − Production Test Only (high- & low-speed modes)
SW2-6 Must be OFF
SW2-6 must be in the OFF position for normal operation.
SW2-7 − 2-/4-Wire Operation (high- & low-speed modes)
SW2-7 ON = 2-Wire, Half-Duplex Mode
OFF = 4-Wire, Full-Duplex Mode
SW2-7 configures the modem for 4-wire full-duplex or 2-wire half-
duplex operation.
Page 16
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Configuring the Modem
SW2-8 − Carrier Control (high- & low-speed modes)
SW2-8 ON = Constant
OFF = Switched
SW2-8 selects either constant or switched carrier. Constant carrier
allows DTEs, such as asynchronous dumb terminals or RTUs, to
operate with modems, without the input RTS signal. When constant
carrier mode is enabled (SW2-8 set to ON), the modem forces the
transmit carrier active and the RTS-CTS delay is minimum (<0.5 ms.).
You can use constant carrier in 4-wire, point-to-point or multi-point
applications (from master to slave modems).
In switched-carrier mode (SW2-8 set to OFF), the RTS/CTS delay is 23
ms.
SW 2-9 − RX Termination (high- & low-speed modes)
SW2-9 ON = Disable Rx Termination
OFF = Enable Rx termination
SW2-9 selects whether RX termination is enabled for a modem. If you
set this switch OFF, the receiver is terminated with 600 Ω. If you set
this switch ON, the receiver is not terminated.
SW 2-10 − Ground Option (high- & low-speed modes)
SW2-10 ON = Modem signal ground is connected to chassis ground
OFF = Modem signal ground and chassis ground
disconnected
SW2-10 determines the grounding option for the modem. Setting this
switch ON connects the modem signal ground to chassis ground.
Setting this switch OFF disconnects the modem signal ground from
chassis ground.
Page 17
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Installation
Low-Speed (FSK) Mode
Table 2-3 shows the modem switch settings that can be used when the
modem is configured for low-speed (FSK) mode. This mode is enabled
when switch SW2-1 is set to ON. Following this table is an explanation
of these settings.
Table 2-3. Modem Switch Settings for Low-Speed Mode
Switches
Switch Settings
OFF
ON
(see Table 2-4 page 19)
SW 1-1 − 1-4: Transmit Level
(page 19)
SW 1-5: Receiver Dynamic Range
(page 20)
−10 to −43 dBm +3 to −30 dBm
(see Table 2-5 page 20)
SW 1-6 − SW1-7: RTS-CTS Delay
(page 20)
SW 1-8: Anti-streaming (page 20)
Active
Inactive
SW 2-1: High-Speed)/Low-Speed
Mode (page 21)
Low-Speed (FSK)
Mode
High-Speed
(Fast Poll) Mode
SW 2-2: CD Delay (page 21)
SW 2-3: Turnaround SQ (page 21)
SW 2-4: Not Used
23 ms.
0 ms.
6 ms.
8 ms.
SW2-5: Soft Carrier (page 22)
Disabled
Test
Enabled
Normal
SW 2-6: Production Test Only
(page 22)
SW 2-7: 2- or 4-wire (page 22)
SW 2-8: Carrier Control (page 22)
SW 2-9: Rx Termination (page23)
2-wire
4-wire
Constant
Disabled
Switched
Enabled
SW 2-10: Ground Options (page 23) Chassis Ground-
Chassis Ground-
Signal Ground
Disconnected
Signal Ground
Connected
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Configuring the Modem
SW1-1 through SW1-4 − Transmit Level (high- & low-speed modes)
Switches SW1-1 through SW1-4 adjust the modem’s transmit level.
Table 2-4 shows the transmit levels you can select using these switches.
Table 2-4. Transmit Levels (High-Speed and Low-Speed Modes)
SW1-1 through SW1-4 Switch Settings
SW1-1
SW1-2
SW1-3
SW1-4
Transmit Level
0 dBm
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
OFF
OFF
OFF
OFF
ON
OFF
OFF
ON
OFF
ON
−1 dBm
−2 dBm
−3 dBm
−4 dBm
−5 dBm
−6 dBm
−7 dBm
−8 dBm
−9 dBm
−10 dBm
−11 dBm
−12 dBm
−13 dBm
−14 dBm
+3 dBm
OFF
ON
ON
OFF
OFF
ON
OFF
ON
ON
ON
OFF
ON
ON
ON
OFF
OFF
OFF
OFF
ON
OFF
OFF
ON
OFF
ON
ON
ON
OFF
ON
ON
ON
ON
OFF
OFF
ON
OFF
ON
ON
ON
ON
ON
OFF
ON
ON
ON
ON
Page 19
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Installation
SW1-5 − Receiver Dynamic Range (high- & low-speed modes)
SW1-5
ON = −10 to −43 dBm
OFF = +3 to −30 dBm
For a low receive signal level, set SW1-5 to ON (−43 dBm ). For short
distances or to select a strong receive signal, set SW1-5 to OFF.
SW1-6 and SW1-7 − RTS-CTS Delay (low-speed mode only)
Switches SW1-6 and SW1-7 determine the duration of the RTS-CTS
delay. Table 2-5 shows the RTS-CTS delays you can select using these
switches.
Table 2-5. RTS-CTS Delays
SW1-6 and SW1-7 Switch Settings
SW1-6
SW1-7
RTS-CTS Delay
8 ms. delay
OFF
OFF
ON
OFF
ON
33 ms. Delay
59 ms. Delay
219 ms. delay
OFF
ON
ON
SW1-8 − Anti-streaming (high- & low-speed modes)
SW1-8 ON = Anti-streaming active
OFF = Anti-stream inactive
Typically, anti-streaming is used in multi-point applications to prevent
a malfunctioning slave modem from occupying the line indefinitely.
When anti-streaming is active, the modem can transmit data for a
maximum of 27 seconds before the transmitter turns off automatically.
The modem then looks for an ON-to-OFF Request To Send (RTS)
transition before proceeding with normal operation. Anti-streaming can
be selected in either high-speed or low-speed mode.
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Configuring the Modem
SW2-1 − Fast Poll/FSK (high- & low-speed modes)
SW2-1 ON = Low-Speed Mode (FSK)
OFF = High-Speed Mode (Fast Poll)
SW2-1 configures the modem for either low-speed (FSK) mode or
high-speed (Fast Poll) mode. As a result, the SW2-1 setting you choose
determines the switch definitions for the other switches.
™
For high-speed mode, the configuration switches follow the
definitions in Table 2-1.
™
For low-speed mode, the configuration switches follow the
definitions in Table 2-3.
SW2-2 − CD Delay (low-speed mode only)
SW2-2 ON = 23 milliseconds
OFF = 6 milliseconds
SW2-2 controls the Carrier Detect (CD) delay and is valid for low-
speed mode only. Setting this switch to ON configures the modem to
turn on CD 23 milliseconds after it detects a valid carrier signal. Setting
this switch to OFF configures the modem to turn on CD 6 milliseconds
after it detects a valid carrier signal.
SW2-3 − Turnaround Squelch Delay (low-speed mode only)
SW2-3 ON = 0 milliseconds
OFF = 8 milliseconds
SW2-3 controls the turnaround squelch delay and is valid for low-speed
mode only. Setting this switch to ON configures the modem to enable
its receiver immediately after the Request To Send (RTS) signal is
turned off. When this switch is set to OFF and the modem is configured
for 2-wire mode (SW2-7 set to ON), the modem squelches the receiver
for 8 milliseconds after RTS is turned off to prevent far-end echoes
from causing data errors.
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Installation
SW2-5 − Soft Carrier (low-speed mode only)
SW2-5 ON = Disabled
OFF = Enabled
SW2-5 controls the soft carrier and is valid for low-speed mode only.
Setting this switch to OFF configures the modem to transmit a 900 Hz
soft carrier to the remote modem after RTS is turned off. Setting this
switch to ON prevents the modem from transmitting a soft carrier after
RTS is turned off.
SW2-6 − Production Test Only (high- & low-speed modes)
SW2-6 Must be OFF
SW2-6 must be in the OFF position for normal operation.
SW2-7 − 2-/4-Wire Operation (high- & low-speed modes)
SW2-7 ON = 2-Wire, Half-Duplex Mode
OFF = 4-Wire, Full-Duplex Mode
SW2-7 configures the modem for 4-wire full-duplex or 2-wire half-
duplex operation.
SW2-8 − Carrier Control (high- & low-speed modes)
SW2-8 ON = Constant
OFF = Switched
SW2-8 selects either constant or switched carrier. Constant carrier
allows DTEs, such as asynchronous dumb terminals or RTUs, to
operate with modems, without the input RTS signal. When constant
carrier mode is enabled (SW2-8 set to ON), the modem forces the
transmit carrier active and the RTS-CTS delay is minimum (<0.5 ms.).
You can use constant carrier in 4-wire, point-to-point or multi-point
applications (from master to slave modems).
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Installing the Modem in the Universal Data Shelf
In switched-carrier mode (SW2-8 set to OFF), the RTS/CTS delay is 23
ms.
SW 2-9 − RX Termination (high- & low-speed modes)
SW2-9 ON = Disable Rx Termination
OFF = Enable Rx termination
SW2-9 selects whether RX termination is enabled for a modem. If you
set this switch OFF, the receiver is terminated with 600 Ω. If you set
this switch ON, the receiver is not terminated.
SW 2-10 − Ground Option (high- & low-speed modes)
SW2-10 ON = Modem signal ground is connected to chassis ground
OFF = Modem signal ground and chassis ground
disconnected
SW2-10 determines the grounding option for the modem. Setting this
switch ON connects the modem signal ground to chassis ground.
Setting this switch OFF disconnects the modem signal ground from
chassis ground.
Installing the Modem in the Universal Data
Shelf
After you set the modem’s configuration switches, you can install it in a
slot within a 19- or 23-inch Telenetics or Motorola RM16M Universal
Data Shelf. The modem is installed or replaced from the front of the
Universal Data Shelf, without disturbing the cable connections on the
back of the Shelf. The modem can be installed and removed without
having to remove power from the Shelf. Special tools or test equipment
are not required for installing the modem.
1. Wear an antistatic wrist strap over your wrist on your bare skin
(not over a shirt or jacket).
2. Remove the wrapping protecting the modem.
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Installation
3. Remove the front panel of the Universal Data Shelf and pick an
empty slot.
4. Hold the modem so the front panel LEDs are facing you and the
edge connectors are pointing to the backplane of the Universal
Data Shelf.
5. Install the modem into the selected slot in the Universal Data Shelf
(see Figure 2-3).
6. Push firmly on the modem to seat it properly into the slot and
backplane. The back of the Universal Data Shelf contains the
connectors for interfacing to the Date Terminal Equipment and
communications line. Figure 2-4 shows how the modems look
when installed in the rack.
7. Replace the front panel of the Universal Data Shelf.
Figure 2-3. Installing the Modem
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Connecting to a Transmission Line
Figure 2-4. Modems Installed in the Rack
Connecting to a Transmission Line
The Universal Data Shelf has different Telco options. Your version
may have 16 8-pin modular jack connectors, one for each slot in the
Shelf. It may also have an optional 50-pin mass-termination Telco
connector.
To connect your modem to a leased line using the modular jack
connectors, refer to “Modular Jack Connectors,” below. To use the 50-
pin mass-termination connector, refer to “Mass Termination
Connector” on page 26.
Modular Jack Connectors
The rear panel of the Universal Data Shelf has an 8-pin RJ-45 jack for
each slot in the Shelf. After you install the modem into a slot, connect
the slot’s corresponding RJ-45 jack to a leased line.
Leased lines have four contacts: a transmit (Tx) pair and a receive (Rx)
pair. For communication to occur:
™
The Rx line of the Shelf’s RJ-45 jack must connect to the Tx line
of the other modem.
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Installation
The Tx line of the Shelf’s RJ-45 jack must connect to the Rx line
™
of the other modem.
For more information, refer to the Telenetics RM16M Installation and
Operation Manual for the Universal Data Shelf version you have.
Mass Termination Connector
As an option, a 50-pin mass-termination connector can be used as the
Telco connection for the modem(s). For more information, refer to the
Telenetics RM16M Installation and Operation Manual for the Universal
Data Shelf version you have.
Connecting an RS-232 Device
The Universal Data Shelf has different RS-232 options for accepting an
attached RS-232 (RTU) device. Your version may have a female, 25-
pin RS-232 connector for each slot in the Shelf. It may also have an
optional 50-pin mass-termination Telco connector. For more
information, refer to the Telenetics RM16M Installation and Operation
Manual for the Universal Data Shelf version you have.
Page 26
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LEDs
LEDs
The front panel of the modem provides the LEDs shown in Table 2-7.
Table 2-7. Modem LEDs
LED
Color
Green
Description
Power
Power
Yellow
Yellow
Yellow
Yellow
Yellow
Red*
Request To Send
Clear To Send
Transmit Data
Receive Data
RTS
CTS
TxD
RxD
DCD
ALB
DLB
Carrier Detect
Analog Loopback
Digital Loopback
Red*
* When the modem is in remote loopback, both the ALB
and DLB LEDs go ON.
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Installation
Loopback Control Switch
The front panel of the modem has a push button for initiating the
following loopback diagnostic tests:
™
™
™
Local analog loopback started by pressing the button one time.
Local digital loopback started by pressing the button two times.
Remote digital loopback set the local modem’s RTS signal to
low. Then press the remote modem’s diagnostics button three times
and raise the local modem’s RTS signal to start the test. The ALB
and DLB LEDs go ON when the modem is in remote digital
loopback. This test is only available in Fast Poll mode only.
Figure 2-6 illustrates these three diagnostics.
Figure 2-6. Loopback Diagnostics
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Appendix A
Troubleshooting
n the event you encounter a problem using your Telenetics modem,
refer to the troubleshooting information in this appendix. To
troubleshoot the power supply and backplane on the Universal Data
Shelf, refer to the Telenetics RM16M Installation and Operation
Manual for the Universal Data Shelf version you have.
If you encounter a problem with your modem, be sure
,
IMPORTANT
the modem switches are set to the appropriate
positions. If a switch is halfway between an on and off
setting, the modem will not operate properly.
Problem Solving
Table A-1 offers troubleshooting solutions for modem problems.
Table A-1. Troubleshooting Suggestions
If…
Perform These Procedures…
Modem does not respond and Check the Universal Data Shelf’s
all LEDs are off. power supply module(s).
Modem does not receive data, The receive line pair may be
disconnected from the modem. Make
sure the transmission line connection
to the rear panel of the Universal Data
Shelf is accurate and secure.
and the DCD and RxD LEDs
are off.
The receive signal level may be below
the CD threshold. Set SW1-5 ON to
see whether configuring the modem
for a −43 dBm threshold resolves the
problem.
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Troubleshooting
Table A-1. Troubleshooting Suggestions
If…
Perform These Procedures…
The attached terminal or DTE may not
be sending data to the modem. Verify
that data is being transmitted. If data is
being transmitted, make sure the RS-
232 cable is sound and securely
connected to the modem and terminal
or DTE.
The RTS, CTS, and TxD
LEDs do not blink.
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Appendix B
Specifications
General Specifications
Data rate:
9600, 4800, or 0-1800 bps asynchronous
8 or 9 data bits with 1 or more stop bits
EIA RS-232 or V.24 compatible
Data format:
DTE interface:
Line conditions:
TELCO Voice band 4- or 2-wire leased line,
conditioned or unconditioned
Private metallic circuits up to 9.5 miles (24
AWG) without cable equalizer. Up to 15.0 miles
(24 AWG) with TX and RX cable equalizer
Operating modes: 2-wire half-duplex or 4-wire full-duplex
Modulation:
High-speed fast poll – Telenetics proprietary
FSK, Bell 202T compatible
•
•
•
Mark = 1200 Hz
Space = 2200 Hz
Soft Carrier = 900 Hz
Equalizer:
Automatic, adaptive
RTS-CTS Delay:
23 ms. (fast poll)
8, 33, 59, or 219 ms (FSK)
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Specifications
Receiver
dynamic range:
0 to –30 dBm or –10 to –43 dBm
Operating
temperature:
-40°C to +85°C
Surge protection:
Leased line, up to 15KV
Carrier Control:
Constant or switched, DIP switch selectable
Carrier loss
recovery:
Train on Data
Throughput delay: Less than 10 milliseconds for fast polling.
Auto RTS:
Support DTE without hardware RTS
(high speed only)
Anti-Streaming:
27-second timer to prevent transmitter lock-up
network
Mechanical Specifications
Dimensions:
9 inches deep x 6.25 inches high x .87 inches
thick
Weight:
8 ounces (card only)
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Back-to-Back Connections to a Second Modem
Back-to-Back Connections to a Second
Modem
Rx
Rx
Rx
Rx
Tx
Tx
Tx
Tx
Modem 1
Modem 2
RS-232 (RTU) Interface
Signal
Name
Modem
Input/Output
DB25
Pin
Description
Earth GND
TXD
1
2
3
4
5
6
Earth Ground
Transmit Data
Receive Data
Request To Send
Clear To Send
Input
RXD
Output
Input
RTS
CTS
Output
Output
DSR
Data Set Ready
(Modem Ready)
SG
-
7
8
Signal Ground
DCD
DTR
Output
Input
Data Carrier Detected
20
Data Terminal Ready
(Host Ready)
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Specifications
Environmental Specifications
Operating temperature: -40 to + 85o C
Storage temperature:
Operating humidity:
Isolation:
-40 to +125o C
5 to 95 %, non-condensing.
3750 V RMS
Surge protection:
Leased line up to 15K VA
Compliances
The modem is designed to meet the following agency requirements:
EMI/RFI:
FCC part 15 for Class A computing device
Industry Canada. (Emissions)
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Appendix C
Limited Product
Warranty
Telenetics warrants that the Product sold will be free from defects in material and
workmanship and perform to Telenetics' applicable published specifications for a period of
18 months from the date of delivery to Customer or 12 months from placement into
service, whichever occurs first. The liability of Telenetics hereunder shall be limited to
replacing or repairing, at its option, any defective Products which are returned F.O.B.,
Telenetics' facility, Lake Forest, California (or, at Telenetics' option refunding the purchase
price of such products). In no case are Products to be returned without first obtaining
permission and a customer return order number from Telenetics. In no event shall
Telenetics be liable for any consequential or incidental damages.
Products which have been subject to abuse, misuse, accident, alteration, neglect,
unauthorized repair or installation are not covered by the warranty. Telenetics shall make
the final determination as to the existence and cause of any alleged defect. No liability is
assumed for expendable items such as lamps and fuses. No warranty is made with respect
to custom products or Products produced to Customer's specifications except as
specifically stated in writing by Telenetics in the agreement for such custom products.
This warranty is the only warranty made by Telenetics with respect to the goods delivered
hereunder, and may be modified or amended only by a written instrument signed by a duly
authorized officer or Telenetics and accepted by Customer.
This warranty and limitation extends to customer and to users of the product and is in lieu
of all warranties with respect to the product whether express, implied, or statutory,
including without limitation the implied warranties of merchantability and fitness for a
particular purpose.
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Appendix D
RMA Procedure
Return Merchandise Authorization (RMA) Procedure
Before returning any Telenetics product, an RMA number must be obtained. Before
asking for an RMA number, ascertain that the product was purchased from Telenetics. If
you bought the product from a Distributor or Systems Integrator, the product should be
returned to that vendor.
The most convenient method to obtain an RMA number for a product purchased from
include
Your Company Name, address, the actual address that we would use to return the product
to you. Please include any Mail Stop or specific delivery information. The City, State,
and zip code are all required. Your phone and FAX numbers. Your email address.
If the above information is on your letterhead, that format is acceptable.
For each item you wish to return: List the product model number, usually found on the
serial number tag, the serial number for each item you wish to return, a description of the
problem you are encountering, and the cause of the problem (if known).
A product support specialist may call to verify that the product is properly installed or
may ask you to perform tests to insure that the product has actually failed.
After review of the problem, an RMA number will be assigned, you will be notified by
email or FAX.
The product must be properly packed and returned to:
Telenetics
25111 Arctic Ocean
Lake Forest, CA 92630
The RMA number must be legibly displayed on the shipping carton.
No RMA’s will be issued without a product review, Telenetics will not be responsible for
any product returned without an RMA number.
In the near future the RMA form will be available on our Web site
Telenetics.com/support/rma. Fill in all blanks and click on the “Submit” button.
If you think the product may be out of warranty, include a method of payment for repairs,
either a Purchase Order number, or Credit card number, Card Holder Name, Date of
Expiration on the RMA request. Repairs currently require 5 – 10 working days, and are
returned UPS second day air.
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