Raymar DSP9612RM User Manual

DSP9612RM Flash Poll

Rack-Mount Modem

User’s Guide

DSP9612RM USER’S GUIDE

0049-0519-000 Page i REV.D

The products and programs described in this User’s Guide are licensed products
of Raymar Information Technology, Inc. This User’s Guide contains proprietary
information protected by copyright, and this User’s Guide and all accompanying
hardware and documentation are copyrighted.

Raymar Information Technology, Inc. does not warrant that the hardware will
work properly in all environments and applications, and makes no warranty and
representation, either implied or expressed, with respect to the quality,
performance, merchantability, or fitness for a particular purpose.

Information in this User’s Guide is subject to change without notice and does not
represent a commitment on the part of Raymar Information Technology, Inc.
Raymar Information Technology, Inc. assumes no responsibility for any
inaccuracies that may be contained in this User’s Guide.

Raymar Information Technology, Inc. makes no commitment to update or keep
current the information in this User’s Guide, and reserves the right to make
changes to this User’s Guide and/or product without notice.

No part of this manual may be reproduced or transmitted in any form or by any
means, electronic or mechanical, including photocopying, recording, or
information storage and retrieval systems, for any purpose other than the
purchaser's personal use, without the express written permission of Raymar
Information Technology, Inc.

© Copyright 2010
Raymar Information Technology, Inc.
7325 Roseville Road
Sacramento, California 95842
Tel: [phone]
Direct: [phone]
Fax: [phone]

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Compliances

This device complies with Part 15A of the FCC Rules. Operation is subject to the
following two conditions: (1) this device may not cause harmful interference, and
(2) this device must accept any interference received, including interference that
may cause undesired operation.

This equipment has been tested and found to comply with the limits for a Class A
digital device, pursuant to Part 15A of the FCC Rules. These limits are designed
to provide reasonable protection against harmful interference in a residential
installation. This equipment generates, uses, and can radiate radio frequency
energy and, if not installed and used in accordance with the instructions, may
cause harmful interference to radio communications. However, there is no
guarantee that interference will not occur in a particular installation. If this
equipment does cause harmful interference to radio or television reception, which
can be determined by turning the equipment off and on, the user is encouraged to
try to correct the interference by one or more of the following measures:

 Reorient or relocate the receiving antenna.
 Increase the separation between the equipment and the receiver.
 Connect the equipment to an outlet on a circuit other than the one to which

the receiver is connected.

 Consult the dealer or an experienced radio/TV technician for help.

If none of these actions resolves the problem, consult your distributor or an
experienced radio/television technician for additional suggestions.

Additionally, Section 15.838, paragraph d), of the FCC Rules and Regulations
states: “Where special accessories, such as shielded cables, are required in order
to meet FCC regulations, shielded cables must be used with this equipment.
Operation with non-approved equipment or unshielded cables is likely to result in
interference to radio and TV reception. The user is cautioned that changes and
modifications to this equipment without the approval of the manufacturer could
void the user’s authority to operate this equipment.

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Contents

CHAPTER 1 INTRODUCTION......................................1

FEATURES.............................................................................2

APPLICATIONS ......................................................................2

ANCILLARY DOCUMENTATION..............................................3

CHAPTER 2 INSTALLATION .......................................4

UNPACKING YOUR HARDWARE ............................................4

ADDITIONAL ITEMS YOU NEED.............................................4

HARDWARE OVERVIEW ........................................................4

Front View........................................................................4

Component View...............................................................5

INSTALLATION SUMMARY.....................................................7

ONFIGURING THE MODEM...................................................7

C

SW1 DIP Switch Settings..................................................8

SW2 DIP Switch Settings................................................11

SW3 DIP Switch Settings................................................14

I

NSTALLING THE MODEM....................................................18

CONNECTING TO A TRANSMISSION LINE .............................19

Modular Jack Connectors ..............................................19

Mass Termination Connector.........................................20

CONNECTING AN RS-232 DEVICE.......................................20

LEDS..................................................................................21

LOOPBACK CONTROL SWITCH ............................................21

APPENDIX A TROUBLESHOOTING.........................27

PROBLEM SOLVING.............................................................27

APPENDIX B SPECIFICATIONS................................24

GENERAL SPECIFICATIONS..................................................24

MECHANICAL SPECIFICATIONS ...........................................25

BACK-TO-BACK CONNECTIONS TO A SECOND MODEM.......26

RS-232 (RTU) Interface..................................................26

ENVIRONMENTAL SPECIFICATIONS .....................................27

APPENDIX C LIMITED PRODUCT WARRANTY...28

APPENDIX D RMA PROCEDURE..............................29

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Chapter 1

Introduction

Congratulations for purchasing the finest industrial-grade fast-poll rack-mount

modem available.
The Raymar-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 Raymar-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 an RM16M Rack (16 slots, 3U) or the RMX Shelf
(2 slots, 1U) from Raymar-Telenetics. The modem occupies only one rack slot,
eliminating the hassle of equipment trays and power bricks required for “Stand
Alone” modems. The modem is powered from the modem rack.

The DSP9612RM modem is ideally suited for multi-point communication
systems that require fast response time, short training time, and low throughput
delay. The modem 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.

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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.
 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.

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

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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 how to adapt an AC powered DSP9612RM modem to a
DC power operation, refer to the included documents (0062-0117-001). Also
refer to the RM16M Installation and Operation Guide (TEL-6200508506004).

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Chapter 2

Installation

This chapter describes how to install the modem.

Unpacking Your Hardware

Your package should include:

 At least one DSP9612RM modem
 This User’s Guide (on CD)

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:

 An RM16M Rack or an RMX Shelf from Raymar-Telenetics
 A two- or four-wire transmission line or leased line

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 21.
 A set of eight LEDs. See page 21.

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Figure 2-1. Front View of Modem

Component View

Figure 2-2 shows the component view of the modem. This view shows:
 Three configuration switch blocks, designated SW1, SW2, and SW3. See

page 7.

 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 an RMX Shelf or an RM16M Rack from Raymar-Telenetics.

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Edge Connectors

Switch Block SW3

Configuration
Switch Blocks

Switch Block

SW2

Figure 2-2. Component View of Modem

Switch Block SW1

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Installation Summary

The modem installation involves the following steps:

1. Configuring the modem. See below.

2. Connecting to a transmission line. See page 19.

3. Connecting an RS-232 device. See page 20.

Configuring the Modem

You configure the modem using the three sets of DIP switches on the bottom of
the modem.

,

IMPORTANT

It is important to follow the three
steps described below, in the order
shown, to ensure that you configure
your modem properly using the
modem DIP switches:

1. Use DIP switch 3 (SW3) to

configure the modem for your
host DTE interface and network
topology. Using SW3, you
select the modem to operate in
high-speed fast-poll or low­speed (FSK) mode.

2. If you set SW3 for FSK mode

in step 1, use DIP switch 2
(SW2) to configure the modem
for either Bell 202T or ITU-T
V.23 compatibility. Otherwise,
you can use the modem in
fallback mode.

3. Use DIP switch 1 (SW1) to

select the modem’s transmitter
output level and receiver
dynamic range. The SW1
settings apply for both high­speed fast-poll and low-speed
(FSK) modes

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.

DSP9612RM USER’S GUIDE

SW1 DIP Switch Settings

SW1 is an 8-position DIP switch. Table 2-1 shows the modem switch settings for DIP
switch SW1. A description of the SW1 switch settings follows the table.

Note:

SW1 settings apply for both high­speed fast-poll and low-speed (FSK)
modes

Table 2-1. Modem Switch Settings for DIP Switch SW1

Switch Settings Switches

ON OFF

(Default)

SW1-1 − SW1-4: Transmit
Level (page 9)

SW1-5: Receiver Dynamic
Range (page 10)

SW1-6: TX Cable Equalizer
(page 10)

SW1-7: RX Cable Equalizer
(page 10)

SW1-8: Anti-streaming (page

10)

(see Table 2-2 on page 9)

−10 to −43 dBm +3 to −30 dBm

Enabled Disabled

Enabled Disabled

Active Inactive

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SW1-1 through SW1-4 − Transmit Level

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

SW1 through SW4 Switch Settings

Transmit Level

0 dBm OFF OFF OFF OFF

SW1-1 SW1-2 SW1-3 SW1-4

−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 ON ON ON ON

OFF OFF OFF ON
OFF OFF ON OFF
OFF OFF ON ON
OFF ON OFF OFF
OFF ON OFF ON
OFF ON ON OFF
OFF ON ON ON

ON OFF OFF OFF
ON OFF OFF ON
ON OFF ON OFF
ON OFF ON ON
ON ON OFF OFF
ON ON OFF ON
ON ON ON OFF

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SW1-5 − Receiver Dynamic Range

SW1-5

−10 to −43 dBm

ON =
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 (Fast-Poll 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 fast-poll mode (SW3-1 set to OFF).

SW1-8 − Anti-streaming

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 anti­streaming 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 ON­to-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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SW2 DIP Switch Settings

SW2 is an 8-position DIP switch. Table 2-3 shows the modem switch settings for
DIP switch SW2. A description of the SW2 switch settings follows the table.

Table 2-3. Modem Switch Settings for DIP Switch SW2

Switch Settings Switches

ON OFF (Default)

SW2-1: FSK Mode (page 12) V.23 Bell 202
SW2-2: Receiver Squelch

(page 12)
(valid for FSK mode, 2-wire
half-duplex operation only)

SW2-3: FSK Soft Carrier
(page 13)

SW2-4 and SW2-5: FSK
RTS-CTS Delay
(page 13)

SW2-6: FSK CD Delay
(page 13)

SW2-7: Remote Loopback
(page 14)

SW2-8: Reserved (Test Only)
(page Error! Bookmark not
defined.)

Turnaround Squelch
(Bell 202): 8ms

Turnaround Squelch
(V.23): 150ms

Disabled Enabled

23ms 6ms

Enabled Disabled

Test Normal

Turnaround Squelch
(Bell 202): 0ms

Turnaround Squelch
(V.23): 0ms

(see Table 2-4)

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SW2-1 ⎯ FSK Mode

SW2-1 ON = ITU-T V.23 mode

OFF = Bell 202 mode

The modem has two FSK modes:

 Bell 202, which supports data rates from 0 to 1800 bps
 ITU-T V.23, which supports data rates from 0 to 1200 bps

SW2-1 configures the modem for either of these FSK modes. Setting SW2-1 to
ON selects ITU-T V.23 mode. In this mode, the modem complies with ITU-T
(CCITT) recommendation V.23 with the following parameters:

 Mode 2 modulation only
 No backward channel
 No provisions for disablement of echo suppressors
 DTR (circuit 108) is ignored

Setting SW2-1 OFF selects Bell 202 mode.

SW2-2 ⎯ Receiver Squelch (FSK Mode 2-Wire Half-Duplex Only)

SW2-2 ON = 8ms for Bell 202, 150ms for ITU-T V.23

OFF = 0ms

SW2-2 configures the turnaround squelch delay and is valid when the following
are active:

 FSK mode (SW3-1 ON)
 2-wire half-duplex operation (SW3-7 ON)

Setting this switch to OFF 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, half-duplex mode
(SW3-7 ON), the modem squelches the receiver after RTS is turned off to prevent
far-end echoes from causing data errors. The duration that the modem squelches
the receiver is either:

 8 milliseconds if the modem is configured for Bell 202 mode (SW2-1

OFF)

 150 milliseconds if the modem is configured for ITU-T V.23 mode (SW2-

1 ON)

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SW2-3 ⎯ FSK Soft Carrier (Bell 202 FSK Mode Only)

SW2-3 ON = None

OFF = 8ms

SW2-3 controls the soft carrier and is valid for Bell 202 FSK mode only (SW2-1
set to OFF). Setting this switch to OFF configures the modem to transmit a 900
Hz soft carrier to the remote modem for 8 milliseconds after RTS is turned off.
Setting this switch to ON prevents the modem from transmitting a soft carrier
after RTS is turned off.

SW2-4 and SW2-5 ⎯ RTS-CTS Delay (Bell 202 Mode Only)

Switches SW2-4 and SW2-5 determine the duration of the RTS-CTS delay in Bell
202 mode. Table 2-4 shows how to set these switches to select the appropriate
setting.

Table 2-4. RTS-CTS Delay Settings in Bell 202 Mode

To Select a Delay

of…

8ms OFF OFF
33ms OFF ON
59ms ON OFF

219ms ON ON

Set SW2-4 to… And Set SW2-5

to…

When the modem is configured for V.23 operation (SW2-1 ON), the RTS-CTS
delay is fixed at 33 ms.

⎯

SW2-6

SW2-6 ON = 23ms

FSK CD Delay (Bell 202 Mode Only)

OFF = 6ms

SW2-6 selects the FSK CD delay and is valid when Bell 202 mode is active
(SW2-1 OFF). Setting SW2-6 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.

This switch setting is deactivated when the modem is configured for V.23 mode
(SW2-1 ON) and a delay of 18 milliseconds is used instead.

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SW2-7 ⎯ Remote Loopback

SW2-7 ON = Loopback enabled

OFF = Loopback disabled

During instances of channel noise, the modem may mistake a received preamble as a
request to go into remote digital loopback. Setting SW2-7 to OFF prevents the modem
from participating in a remote digital loopback with another modem. SW2-7 does not
prevent the modem from sending a remote digital loopback request to a remote modem.

SW2-8 ⎯ Reserved (Test Only)

SW2-8 Must be OFF

SW2-8 must be in the OFF position for normal operation.

SW3 DIP Switch Settings

SW3 is a 10-position DIP switch. Table 2-5 shows the modem switch settings for DIP
switch SW3. A description of the SW3 switch settings follows the table.

Table 2-5. Modem Switch Settings for DIP Switch SW3

Switch Settings Switches

ON OFF (Default)

SW3-1: Fast Poll/FSK (page 15) FSK Fast Poll Auto-

Rate
SW3-2: Data Rate (page 15) 4800 bps 9600 bps
SW3-3: Async Character (page 16) 11 bits 10 bits
SW3-4: Auto RTS (page 15) Enabled Disabled
SW3-5: Transmitter Termination

(page 16)
SW3-6: Reserved (Test Only)

(page 16)
SW3-7: 2- or 4-wire (page 17) 2-wire, half-duplex 4-wire, full-

SW3-8: Carrier Control (page 17) Constant Switched
SW3-9: Rx Termination (page17)

Switched by RTS

Test Normal

600 Ω

600 Ω

duplex

High Rx

Impedance
SW3-10: Signal Ground and Earth

Ground Option (page 17)

Connected Separated

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SW3-1 − Fast Poll Auto Rate/FSK

SW3-1 ON = Low-Speed Mode (FSK)

OFF = High-Speed Mode (Fast Poll)

The modem has two operating modes:

 FSK mode, which supports data rates from 0 to 1800 bps.
 Fast-poll mode, which supports data rates of 4800 and 9600 bps.

SW3-1, along with the Data Rate Selector (DRS) pin on the modem’s RS-232
connector, configures the modem for either FSK or fast-poll mode. Table 2-6
shows how SW3-1 and the DRS signal configure the modem for these operating
modes.

Table 2-6. Modem Operating Mode

To Select… Set SW3-1 to… And the DRS Signal…

Fast-poll mode OFF Is not connected or is set

HIGH
FSK mode OFF Is set LOW
FSK mode ON Doesn’t care

You should use the DRS signal in RTS control mode. It does not work in either
constant carrier mode (SW3-8 set to ON) or in the auto-RTS mode (SW3-4 set to
ON). The DRS signal is only sampled when the transmitter is idle (when not
sending a preamble, data, or a turn-off sequence).

Note that the DRS control both the transmitter and receiver. If DRS changes
states while the modem is receiving a preamble, data, or a turn-off sequence, the
state of the receiver is unknown until the carrier drops and a new preamble is
received. We recommend that the DRS does not change states until both the local
and remote modems’ transmitters are in the idle state. When they are, both the
local and remote modems’ DRS signal should change states.

SW3-2 − Data Rate (Fast-Poll Mode Only)

SW3-2 ON = 4800 bps

OFF = 9600 bps

SW3-2 configures the modem speed. When the modem is in high-speed fast-poll
mode (SW3-1 OFF), setting SW3-2 ON selects 4800 bps, while setting SW3-2
OFF selects 9600 bps.

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SW3-3 − Async Character (Fast-Poll Mode Only)

SW3-3 ON = 11 bits

OFF = 10 bits

Switch SW3-3 selects whether the async character is 10 or 11 bits long. When the
modem is in high-speed fast-poll mode (SW3-1 OFF), setting SW3-3 ON selects an 11­bit async character, while setting SW3-3 OFF selects a 10-bit async character.

SW3-4 − Auto RTS (Fast-Poll Mode Only)

SW3-4 ON = Enable Auto RTS

OFF = Disable Auto RTS

For data terminals that do not support hardware RTS, set SW3-4 to ON to enable auto
RTS mode. In this mode, TXD is detected at the modem and an internal RTS signal 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. Auto RTS
is used in fast-poll mode only (SW3-1 set to OFF).

SW3-5 − Transmitter Termination

SW3-5 ON = Switched by RTS

OFF = 600 Ω

SW3-5 is used for multi-point configuration networks. When multiple modems are
connected on the same metallic circuit:

 The transmitter termination should be of high impedance if the modem is not

transmitting.

 The transmitter is only terminated with 600 ohms when RTS is asserted.

This configuration should be used for all slave modems to prevent the transmitting
modem from being unnecessarily burdened. To select this configuration, set SW3-5 ON
on the slave modems.

If you use the modem with transmission lines that are transformer-coupled or with an
impedance-isolated network (such as a transformer bridge), set SW3-5 to OFF for proper
operation.

−

SW3-6

SW3-6 Must be OFF

Reserved (Test Only)

SW3-6 must be in the OFF position for normal operation.

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SW3-7 − 2-/4-Wire Operation

SW3-7 ON = 2-Wire, Half-Duplex Mode

OFF = 4-Wire, Full-Duplex Mode

SW3-7 configures the modem for 4-wire full-duplex or 2-wire half-duplex operation.

SW3-8 − Carrier Control

SW3-8 ON = Constant

OFF = Switched

SW3-8 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 (SW3-8 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 (SW3-8 set to OFF), the RTS/CTS delay is active.

SW3-9 − RX Termination

SW3-9 ON = Enable Rx Termination

OFF = Disable Rx Termination

SW3-9 selects whether RX termination is enabled for a modem. If you set this switch
ON, the receiver is terminated with 600 Ω. If you set this switch OFF, the receiver is not
terminated.

−

SW3-10

SW3-10 ON = Signal Ground and Earth Ground are Connected

Grounding Option

OFF = Signal Ground and Earth Ground are Separated

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Installing the Modem

After you set the modem’s configuration switches, you can now install it in a slot
within an RM16M Rack or an RMX shelf from Raymar-Telenetics.

The modem is installed or replaced from the front of the modem cage or modem
rack, without disturbing the cable connections on the back. The modem can be
installed and removed without having to remove power from the modem cage or
modem rack. 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 that is protecting the modem.

3. Open the front panel door of the RM16M modem rack 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 modem rack.

5. Install the modem into the selected slot in the modem rack (see Figure 2-

3).

6. Push firmly on the modem to seat it properly into the slot and backplane.

The back of the modem rack contains the connectors for interfacing to the
Data 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 modem cage or modem rack.

Figure 2-3. Installing the Modem

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Figure 2-4. Modems Installed in the Rack

Connecting to a Transmission Line

The modem rack has different Telco options. Your version may have 16 8-pin
modular jack connectors, one for each slot in the modem rack. 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 20.

Modular Jack Connectors

The rear panel of the modem rack has an 8-pin RJ-45 jack for each slot. After you
install the modem into a slot, connect the slot’s corresponding RJ-45 jack to a
leased line.

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Leased lines have four contacts: a transmit (Tx) pair and a receive (Rx) pair. For
communication to occur:

 The Rx line of the modem cage or modem rack RJ-45 jack must connect

to the Tx line of the other modem.

 The Tx line of the modem cage or modem rack RJ-45 jack must connect to

the Rx line of the other modem.

For more information, refer to the documentation that came with your modem
cage or modem rack.

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 documentation
that came with your modem cage or modem rack.

Connecting an RS-232 Device

The modem cage or modem rack 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 modem cage or modem rack. It may also have an
optional 50-pin mass-termination Telco connector. For more information, refer to
the documentation that came with your modem cage or modem rack.

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LEDs

The front panel of the modem provides the LEDs shown in Table 2-7.

Table 2-7. Modem LEDs

LED Color Description

Power

RTS

CTS

TxD

RxD

DCD

ALB

DLB

* When the modem is in remote loopback, both the ALB and

DLB LEDs go ON.

Green Power

Yellow Request To Send

Yellow Clear To Send

Yellow Transmit Data

Yellow Receive Data

Yellow Carrier Detect

Red* Analog Loopback

Red* Digital Loopback

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 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 on the remote modem
when the modem is in Remote Digital Loopback. This test is available in Fast Poll
mode only. Switch 2, position 7 must be ON on the remote modem to enable
remote digital loopback.

Figure 2-6 illustrates these three diagnostics.

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Figure 2-6. Loopback Diagnostics

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Appendix A

Troubleshooting

In the event you encounter a problem using your modem, refer to the

troubleshooting information in this appendix. To troubleshoot the power supply
and backplane on the modem rack, refer to the documentation that came with
your modem rack.

,

IMPORTANT

If you encounter a problem with your modem,
be sure 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 all LEDs
are off.

Modem does not
receive data, and the
DCD and RxD LEDs
are off.

Check the modem rack power supply
module(s).

The receive line pair may be
disconnected from the modem. Make
sure the transmission line connection to
the rear panel of the modem rack is
accurate and secure.
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.

The RTS, CTS, and
TxD LEDs do not
blink.

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 RS­232 cable is sound and securely
connected to the modem and terminal
or DTE.

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Appendix B

Specifications

General Specifications

Data rate: 9600, 4800, or 0-1800 bps asynchronous
Data format: 8 or 9 data bits with 1 or more stop bits
DTE interface: EIA RS-232 or V.24 compatible
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 – Raymar-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)

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

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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

Rx Rx

Rx Rx

Tx Tx

Tx Tx

Modem 1 Modem 2

See page 24, Figure D-3.

RS-232 (RTU) Interface

Signal

Name

Earth GND

TXD Input 2 Transmit Data
RXD Output 3 Receive Data

RTS Input 4 Request To Send
CTS Output 5 Clear To Send

DSR Output 6 Data Set Ready (Modem

SG - 7 Signal Ground
DCD Output 8 Data Carrier Detected
DTR Input 20 Data Terminal Ready (Host

Modem

Input/Output

⎯

DB25

Pin

1 Earth Ground

Description

Ready)

Ready)

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Environmental Specifications

Operating temperature: -40 to + 85o C

o

Storage temperature: -40 to +125
Operating humidity: 5 to 95 %, non-condensing
Isolation: 3750 V RMS
Surge protection: Leased line up to 15K VA

C

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Appendix C

Limited Product Warranty

One Year Limited Hardware Warranty

Raymar Information Technology, Inc., dba Raymar-Telenetics, warrants their products against defects in hardware, material and
workmanship under normal use for one (1) year from the date of purchase. Raymar will, at no charge, either repair the product (with
new or reconditioned parts), or replace it (with a new or reconditioned product). Repaired replacement products are warranted for
either 90 days or the remainder of the original warranty period, whichever is longer. This warranty extends to the original end-user
only.

What This Warranty Does Not Cover

This warranty does not cover: (a) software; (b) installation or service of the product; (c) conditions resulting from consumer damage
such as improper maintenance or misuse, abuse, accident or alteration; (d) all plastic surfaces (including display screens) and all other
exposed parts that are scratched or damaged due to normal use; (e) operation of our products with equipment not supplied by Raymar
(f) products which have had the serial number removed or made illegible; or (g) products rented to others. This warranty applies only
to hardware products manufactured by or for Raym ar Information Technology, Inc. and identified by the Raymar-Telenetics
trademark, trade name or product identification logo affixed to them. Refer to the Service and Support section of the User’s Guide for
service after the warranty expires. No warranty is made as to coverage availability or grade of service provided by the carrier.

General Provisions

This warranty sets forth Raymar’s entire hardware responsibilities regarding this product. Repair, replacement or refund of the
purchase price is at Raymar’s discretion. THIS WARRANTY IS GIVEN IN LIEU OF ALL OTHER EXPRESS WARRANTIES,
IMPLIED WARRANTIES, INCLUDING WITHOUT LIMITATION IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE, AND ARE LIMITED TO THE DURATION OF THIS LIMITED WARRANTY. IN
NO EVENT SHALL RAYMAR BE LIABLE FOR DAMAGES IN EXCESS OF THE PURCHASE PRICE OF THE PRODUCT,
FOR ANY LOSS OF USE, LOSS OF TIME, INCONVENIENCE, COMMERCIAL LOSS, LOST PROFITS OR SAVINGS, OR
OTHER INCIDENTAL, SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE
THIS RAYMAR PRODUCT, TO THE FULL EXTENT SUCH MAY BE DISCLAIMED BY LAW. WITHOUT LIMITING THE
FOREGOING, RAYMAR SHALL HAVE NO LIABILITY FOR ANY DATA STORED IN OR USED WITH THE PRODUCT,
INCLUDING THE RECOVERY COSTS OF SUCH DATA OR PROGRAMS.

State Law Rights

SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES
OR LIMITATIONS ON HOW LONG AN IMPLIED WARRANTY LASTS. THE ABOVE LIMITATIONS OR EXCLUSIONS
MAY NOT APPLY TO YOU. This warranty gives you specific legal rights, and you may also have other rights which vary from State
to State.

Provincial Law Rights

SOME PROVINCIAL LAWS DO NOT ALLOW THE EXCLUSION OR LIMITATION OF IMPLIED WARRANTIES, THE
EXCLUSION OR LIMITATION OF WARRANTY COVERAGE IN CERTAIN SITUATIONS. SOME OF THE ABOVE
LIMITATIONS OR EXCLUSIONS CONTAINED IN THIS LIMITED WARRANTY MAY NOT APPLY TO YOU. This warranty
gives you specific rights, and you may have other rights which vary from province to province.

How To Use Raymar’s Limited Warranty Service

To take advantage of this warranty, you must do the following:

• If you are having trouble with your product, contact Raymar service using
the appropriate number from the Service and Support section of the User’s
Guide. If it is determined that your product requires service, you will be
issued a Return Materials Authorization (RMA) form.

• Pack the defective product securely for shipping. Include only the units pre­ approved by service on your RMA form.

• This warranty is void if the product is damaged in transit, you m ust insur e
your shipment.

• Ship the defective product, proof of date of purchase, and the RMA form to the address specified.

• Display your RMA number prominently on the outside of the sh ipping box. Customer is responsible for freight in, door to door.
Raymar is responsible for return shipping costs.

• To ensure prompt service, please write on the RMA form a brief description

of the problem you are experiencing with the product.

Raymar Information Technology, Inc.
7325 Roseville Road
Sacramento, CA 95842
Service Hotline [phone]

http://support.telenetics.com

or e-mail to [e-mail]

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Appendix D

RMA Procedure

Return Merchandise Authorization (RMA) Procedure

Before returning any Raymar-Telenetics product, an RMA number must be
obtained.

The most convenient way to obtain an RMA number for a product purchased
from Raymar-Telenetics is to call 1-800-747-1522. When doing so, please have
the following information ready:

- Company name

- Full billing address, as well as the address for the location where the

product should be returned once repaired or replaced

- Telephone & Fax numbers

- Email address

- Product model number and serial number

For each item being returned, please include the product model number, the serial
number, a description of the problem being encountered, and the cause of the
problem (if known).

Please note that prior to authorizing a return, 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.

The product must be properly packed and returned to:

Raymar-Telenetics
7325 Roseville Road
Sacramento, CA 95842

The RMA number must be legibly displayed on the shipping carton. Raymar­Telenetics will not be responsible for any product returned without an RMA
number.

If the product is out of warranty, estimates for repair rates and any applicable
shipping costs will be communicated by a customer service representative.
Currently, Raymar-Telenetics accepts purchase orders or credit cards as payment
methods.

Repairs currently require 5 – 10 business days and are returned via UPS Ground.

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