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Pin Assignments
D-5
3162-A2-GB20-40
August 2000
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, or to a network device (e.g., a router) for
SNMP or Telnet applications. The COM port connector is an 8-position keyed
modular connector (Table D-3). The data signals on this port are referenced to a
DTE interface.
The COM port-to-PC cable is shown in Figure D-4 and the COM
port-to-terminal/printer cable is shown in Figure D-5.
Table D-3. 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