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E. Pin Assignments
E-6
March 2001 3160-A2-GB24-10
AUX Port Interface (Model 3164 Only)
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 (Tabl e E-4,
AUX Port Connector for Model 3164 DSU/CSUs).
NOTE:
For daisy-chaining an AUX port to a COM port (Model 3164 only), a
25-pin-to-8-pin cable is required. The configuration options Com Use and Aux
Use must be set to Daisy. Whenever the cable is connected or disconnected,
change the Com Use and Aux Use configuration options to the correct values.
Table E-4. AUX Port Connector for Model 3164 DSU/CSUs
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