Com Port Interface - Paradyne 3160 Operator's Manual

Pin Assignments

COM Port Interface

D-6
The COM port connects to a PC for front panel emulation, to an ASCII terminal or
printer for alarms, to an async terminal, to a network device (e.g., a router) for
SNMP or Telnet applications, to the LAN Adapter for SNMP or Telnet
applications, or to another DSU/CSU's AUX port for daisy chain connectivity.
(The SNMP LAN Adapter includes the cable that is needed to attach it to the
DSU/CSU.) The COM port connector is an 8-position keyed modular connector
(Table D-6). The data signals on this port are referenced to a DTE interface.
The COM port-to-PC cable is shown in
port-to-terminal/printer cable is shown in
NOTE:
For daisy-chaining an AUX port to a COM port, a 25-pin-to-8-pin cable is
required and the appropriate configuration options (Com Use and Aux Use)
must be set to Daisy. Whenever the cable is connected or disconnected, you
should change the Daisy selection to ensure that the correct parameters
have been negotiated for the link layer.
Table D-6. COM Port Connector
Signal
DCE Transmit Clock
DCE Receive Data
Signal Ground
DCE Transmit Data
DCE Data Terminal Ready
DCE Carrier Detect
DCE Request-to-Send
DCE Receive Clock
March 1999
Figure D-5 and the COM
Figure D-6.
Direction
From DSU/CSU
From DSU/CSU
—
To DSU/CSU
To DSU/CSU
From DSU/CSU
To DSU/CSU
From DSU/CSU
Pin Number
1
2
3
4
5
6
7
8
3160-A2-GB21-80