4
Jumper 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
5
Rack-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)
6
Loopback 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: (916) 783-1951 / Fax: (916) 783-1952
Customer Service is available Monday through Friday, between 8:00 am
and 5:00 pm Pacific Standard Time.
