Lucent Technologies PortMaster, Configuration Manual

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Using Synchronous V.25bis Connections 14-13
Troubleshooting a Synchronous V.25bis Connection
Troubleshooting a Synchronous V.25bis Connection
Most synchronous configurations come up with very little trouble if you have
configured the PortMaster using information from your carrier. If you have problems,
use the information in this section to debug your configuration.
If you are having trouble with a V.25bis dial-up connection to location Locname , verify
the following:
• The error counters should be 0 except for a small number of abnormal termination
errors resulting from plugging cables in or out. If your error counters are nonzero,
the problem is external to the PortMaster.
• Verify that you are using the correct cables and that they are attached securely to
the correct port. Not all WAN ports are capable of the same speeds.
• Verify that the DIP switch is set to V.35 for Lucent cables and that you are plugged
into the correct V.35 interface on your CSU/DSU.
• Verify that the CSU/DSU or synchronous terminal adapter is providing the clock to
the PortMaster. The CSU/DSU or terminal adapter can generate the clock or receive
it from the carrier.
• Verify that the CSU/DSU or synchronous terminal adapter is configured properly.
• To view the PPP negotiation, use the following commands:
Command> set console w1
Command> set debug 0x51
Command> dial Locname
For more information about the interpreting the results of the debug command,
refer to the “PortMaster Troubleshooting Guide.”
After you verify that the PPP negotiation is correct, enter the following commands
to turn off the debug utility:
Command> set debug off
Command> reset console
• Contact your carrier to review your configuration and the status of their line.