Raymar Myriad MD202T User manual

Myriad MD202T
Rack-Mount Modem
Quick Start Guide
This document contains all the information you need to
install the MD202T Rack-Mount Modem in the Raymar-Telenetics
Myriad Modem Rack.
All other trademarks or registered trademarks listed belong to their
respective owners.
© 2010 Raymar Information Technology, Inc. Doc. ID: 0049-0512-XXX
1Introduction
The Myriad MD202T Rack-Mount Modem is an industrial-grade,
0-1200 bps, asynchronous, 2 / 4-wire leased-line modem. It is
designed for installation in a Raymar-Telenetics Myriad Rack-
Mount Modem Bank.
2Modem LEDs
The front panel of the modem has the following LEDs.
*When both DL and AL are ON, the modem sends a steady space.
3Configuration Switches
The DIP switches marked S2 determine the modem operating
characteristics.
S2 Setting
Switch 1 Anti-streaming
ON = 45 seconds
OFF = Disabled (none)
Switches 2 & 3 RTS/CTS Delay Time
SW2 SW3 Function
OFF OFF 1 ms
ON OFF 12 ms
OFF ON 35 ms
ON ON 50 ms
Switch 4 Transmit Center
ON = On continuously
OFF = Follows RTS
LED Function
POWER Power Indicator
DTR Data Terminal Ready
TxD Transmit Data
RxD Receive Data
MR Modem Ready
CD Carrier Detect
RTS Request to Send
CTS Clear To Send
DL* Digital Loopback
AL* Analog Loopback

4Jumper Settings
The modem has the following jumpers.
Jumper Setting
JP2 Transmit Level
1 & 2 = Transmit signal 0 dBm
2 & 3 = Transmit signal -10 dBm
JP3 Receiver Sensitivity
1 & 2 = -10 to -43 dBm
2 & 3 = 0 to -33 dBm
5Rack-Mount Chassis Modem Connector
The back of the Myriad Rack chassis provides a female, DB-25 serial
data connector for each installed modem. The connector’s pin
assignments correspond to the standard RS-232 pin assignments below.
Pin Signal Source
2 Transmit Data DTE
3 Receive Data Modem
4 Ready to Send DTE
5 Clear to Send Modem
6 Data Set Ready Modem
7 Signal Ground ----------
8 Carrier Detect Modem
20 Data Terminal
Ready DTE
S2 Setting
Switch 5 Lease Line 2/4-Wire Configuration
ON = 2 wire
OFF = 4 wire
Switch 6 Received Lease Line Termination
ON = 600 Ohms Termination IN
OFF = No line termination (22K)
Switch 7 Soft Carrier Mode
ON = Soft carrier for 20 ms after RTS
goes from ON to OFF
OFF = Disabled (none)
Switch 8 Test Functions Only (Must be OFF)
6Loopback Configuration
After the modem powers-up, it is in normal mode. Pressing switch SW3
one or more times places it in one of the following modes.
Pressing
SW3 … Causes the Modem to … Result
1 time Enter analog loopback
mode All transmitted data loops back to the Receive Data
port and Transmit Carrier
remains ON.
2 times Enter digital loopback
mode All transmitted data loops back to the Receive Data
port and Transmit Carrier
remains ON.
3 times Send data in space
mode The Transmit Carrier signal and remote CD and RxD
signals are all ON.
The table below shows the status of the AL and DL LEDs for these modes.
LEDs
Modes AL DL
Normal OFF OFF
Analog Loopback ON OFF
Digital Loopback OFF ON
Transmit Data in
Space Mode ON ON
Contacting Raymar-Telenetics
To obtain product information or Customer Service, contact Raymar-
Telenetics using any of the following ways:
Web site: www.raymarinc.com / Voice: [phone] / Fax: [phone]
Customer Service is available Monday through Friday, between 8:00 am
and 5:00 pm Pacific Standard Time.