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Troubleshooting
6-30 Issue 1 October 1998
How to Troubleshoot Data Connection Problems
Symptom: Cannot connect PC or terminal to data network
Action: Users that want simultaneous voice and data access through the
Model 3100 Switch Card, typically connect their PC or terminal to the data
server(s) through a Remote Access Server (RAS) or Terminal Server. In
order for this to work, all the communications settings have to match. To
troubleshoot a data connection problem do the following:
Procedure
1. Check the COM port settings of ALL the devices involved. This
includes the remote PC or terminal, the Remote Module 1101, the Model
3100 Switch Card, and the RAS or terminal server. All the COM port
settings must match. For example, if the PC and RAS are set for 19.2
Kbps with 8 data bits, No parity, and 1 stop bit, those are the exact
settings needed by the remote module and Switch Card. For more
information about these settings see How to set the Switch Card Data
Port Settings, in Chapter 5.
2. Make sure the RS-232 cable on the Switch card is plugged into the
corresponding COMA (not COMB) port on the Rack backplane.
3. Make sure that the remote module is actually online and connected
before attempting to access data. The remote module does not place a
separate call for data access, it is multiplexed with the call already made
for voice functionality.
4. If data access still does not work, make sure that the PC or terminal can
connect directly to the RAS or terminal server. Take the PC or terminal
into the office and instead of using the 1101 and 3100, connect the PC or
terminal directly to the RAS or terminal server using a Null Modem
Cable. If this connection does not work, the problem is not with the
remote module or Switch Card. If this connection does work, re-check
the COM port settings of the remote module and Switch Card. They
must match that of the PC or terminal AND the RAS or terminal server.