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ACCULINK 3163 DSU/CSU
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
Telnet applications, to the LAN Adapter for Telnet
applications, or to another DSU/CSU's AUX port for
daisy chain connectivity. 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
the COM port-to-terminal/printer cable is shown in
Figure
D-5.
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
D-4
Figure D-4
and
Table D-3
COM Port Connector
Signal
Direction
From DSU/CSU
From DSU/CSU
To DSU/CSU
To DSU/CSU
From DSU/CSU
To DSU/CSU
From DSU/CSU
March 1999
NOTE
For daisy-chaining the AUX port
of another 31xx device to the
3163's COM port, a
25-pin-to-8-pin cable is required.
The AUX port of the 31xx device
must be set to Daisy and the
COM port of the 3163 must be
set to Mgmt. 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.
Pin Number
1
2
—
3
4
5
6
7
8
3163-A2-GB20-10
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