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Pin Assignments
D-53160-A2-GB21-50 January 1997
AUX Port Interface
The Auxiliary (AUX) port connects to the LAN
Adapter for SNMP or Telnet applications, or to another
DSU/CSU’s COM port for daisy chain connectivity. (The
SNMP LAN Adapter includes the cable that is needed
to attach it to the DSU/CSU.) The AUX port connector
is a DB25-type socket connector (Table D-4).
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-4
AUX Port Connector
Signal
Direction Pin Number
DTE Transmit Clock From DSU/CSU 15
DTE Receive Data To DSU/CSU 3
Signal Ground — 7
DTE Transmit Data From DSU/CSU 2
DTE Receive Clock From DSU/CSU 17