Paradyne 3160-A4, 3161, and 3165-A4 COM Port Interface

E. Pin Assignments
3160-A2-GB24-10 March 2001 E-7
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 (for Model 3164) 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 unkeyed modular connector
(TableE-5, COM Port Connector). The data sign als on this port are referenced to
a DTE interface.
The COM port-to-PC cable is shown in Figure E-5, COM Port-to-PC Cable, and
the COM port-to-terminal/printer cable is shown in Figure E -6, COM
Port-to-Terminal/Printer Cable.
NOTE:
For daisy-chaining an AUX port to a COM port (Model 3164 only), 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 en sure
that the correct parameters have been negotiated for the link layer.
Table E-5. COM Port Connector
Signal Direction Pin Number
DCE Transmit Clock From DSU/CSU 1
DCE Receive Data From DSU/CSU 2
Signal Ground —3
DCE Transmit Data To DSU/CSU 4
DCE Data Terminal Ready To DSU/CSU 5
DCE Carrier Detect From DSU/CSU 6
DCE Request-to-Send To DSU/CSU 7
DCE Receive Clock From DSU/CSU 8