DSP9612RM USER’S GUIDE
0049-0519-000
Page 20
REV.D
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.
