Raymar Myriad MD9612FP User manual

MD9612FP USER’S GUIDE
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Myriad MD9612FP Flash Poll
Rack-Mount Modem
User’s Guide

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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 2012
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
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
CONFIGURING THE MODEM...........................................7
SW1 DIP Switch Settings.....................................8
SW2 DIP Switch Settings................................... 11
SW3 DIP Switch Settings................................... 14
INSTALLING THE MODEM ........................................... 18
CONNECTING TO A TRANSMISSION LINE ......................... 19
Modular Jack Connectors................................... 19
CONNECTING AN RS-232 DEVICE ................................ 20
LEDS................................................................... 21
LOOPBACK CONTROL SWITCH...................................... 21
APPENDIX A TROUBLESHOOTING..................23
PROBLEM SOLVING................................................... 23
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 MD9612FP (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 Myriad Rack (18 slots, 3U) 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 MD9612FP 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 MD9612FP
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 MD9612FP 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
Host Modem
(Rack Mount or MD9612FP)

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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

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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 MD9612FP 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 Myriad (MDR) Rack 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 MD9612FP 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 MDR Rack from Raymar-Telenetics.

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Figure 2-2. Component View of Modem
Switch Block SW1 Switch Block
SW2 Switch Block SW3
Edge Connectors
Configuration
Switch Blocks

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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 low-speed (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
high-speed fast-poll and low-speed
(FSK) modes.

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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 high- speed fast-poll and low-speed
(FSK) modes
Table 2-1. Modem Switch Settings for DIP Switch SW1
Switch SettingsSwitches
ON OFF
(Default)
SW1-1 −SW1-4: Transmit
Level (page 9) (see Table 2-2 on page 9)
SW1-5: Receiver Dynamic
Range (page 10) −10 to −43 dBm +3 to −30 dBm
SW1-6: TX Cable Equalizer
(page 10) Enabled Disabled
SW1-7: RX Cable Equalizer
(page 10) Enabled Disabled
SW1-8: Anti-streaming (page
10) Active Inactive
Model: MD9612FP

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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 SW1-1 SW1-2 SW1-3 SW1-4
0 dBm OFF OFF OFF OFF
−1 dBm OFF OFF OFF ON
−2 dBm OFF OFF ON OFF
−3 dBm OFF OFF ON ON
−4 dBm OFF ON OFF OFF
−5 dBm OFF ON OFF ON
−6 dBm OFF ON ON OFF
−7 dBm OFF ON ON ON
−8 dBm ON OFF OFF OFF
−9 dBm ON OFF OFF ON
−10 dBm ON OFF ON OFF
−11 dBm ON OFF ON ON
−12 dBm ON ON OFF OFF
−13 dBm ON ON OFF ON
−14 dBm ON ON ON OFF
+3 dBm ON ON ON ON

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SW1-5 − Receiver Dynamic Range
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 (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
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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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 SettingsSwitches
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)
Turnaround Squelch
(Bell 202): 8ms
Turnaround Squelch
(V.23): 150ms
Turnaround Squelch
(Bell 202): 0ms
Turnaround Squelch
(V.23): 0ms
SW2-3: FSK Soft Carrier
(page 13) Disabled Enabled
SW2-4 and SW2-5: FSK
RTS-CTS Delay
(page 13)
(see Table 2-4)
SW2-6: FSK CD Delay
(page 13) 23ms 6ms
SW2-7: Remote Loopback
(page 14) Enabled Disabled
SW2-8: Reserved (Test Only)
(page 14) Test Normal

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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… Set SW2-4 to… And Set SW2-5 to…
8ms OFF OFF
33ms OFF ON
59ms ON OFF
219ms ON ON
When the modem is configured for V.23 operation (SW2-1 ON), the RTS-
CTS delay is fixed at 33 ms.
SW2-6
⎯ FSK CD Delay (Bell 202 Mode Only)
SW2-6 ON = 23ms
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 SettingsSwitches
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) Switched by RTS 600 Ω
SW3-6: Reserved (Test Only)
(page 16) Test Normal
SW3-7: 2- or 4-wire (page 17) 2-wire, half-duplex 4-wire, full-
duplex
SW3-8: Carrier Control (page 17) Constant Switched
SW3-9: Rx Termination (page17) 600 ΩHigh 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 11-bit 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
− Reserved (Test Only)
SW3-6 Must be OFF
SW3-6 must be in the OFF position for normal operation.