Com Port Interface - Paradyne 3160-A3 Operator's Manual

D. Pin Assignments

COM Port Interface

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
Port
The COM port-to-PC cable is shown in
the COM port-to-terminal/printer cable is shown in
Port-to-Terminal/Printer
Table D-6. COM Port Connector
D-6
Connector). The data signals on this port are referenced to a DTE interface.
Cable.
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.
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
February 2001
Figure D-5, COM Port-to-PC
Figure D-6, COM
Direction
From DSU/CSU
From DSU/CSU
—
To DSU/CSU
To DSU/CSU
From DSU/CSU
To DSU/CSU
From DSU/CSU
(Table D-6, COM
Cable, and
Pin Number
1
2
3
4
5
6
7
8
3160-A2-GB21-90