Avaya Troubleshooting Routers Instrukcja Naprawy Pobierz pdf (Strona 137)

Troubleshooting a Network Layer Problem

308656-14.00 Rev 00

6-27

Disconnect the local and remote CSUs from the DCE, and use a breakout

box to verify whether the DCE (modem or CSU) is sending a DSR signal

to the router interface in the on state (positive voltage).

If it is, configure the DCE for DSR to follow CD, or configure DSR to be in

the off state until the DCE receives a DTR signal, and reconnect the CSUs.

Unfortunately, DCE manufacturers use inconsistent terminology for these

settings.

The V.35 pin assignments are as follows:

• RLSD (received line signal detection) Pin F

• RI (ring indicator) Pin J

• DSR (data set ready) Pin E

• DTR (data terminal ready) Pin H

Troubleshooting ISDN BRI and PRI

Troubleshoot ISDN BRI and PRI as follows:

For ISDN PRI only, verify that MCT1/MCE1 initialized correctly.

Example

# 7: mm/dd/yy 10:38:39.363 DEBUG SLOT 4 DS1E1 Code: 50

Connector COM1, Logical Line 1 time_slot = 16.

Connector COM1, Logical Line 1 time_slot = 17.

Connector COM1, Logical Line 1 time_slot = 18.

Connector COM1, Logical Line 1 time_slot = 19.

Connector COM1, Logical Line 1 time_slot = 20.

Connector COM1, Logical Line 1 time_slot = 21.

Connector COM1, Logical Line 1 time_slot = 22.

Connector COM1, Logical Line 1 time_slot = 23.

Connector COM1, Logical Line 1 time_slot = 24.

Connector COM1, Logical Line 1 initialization complete

Filter the log to display messages of all severity levels for the ISDN PRI,

ISDN BRI, and switched services running on the slots in question.

Note:

This is the preferred way to resolve this problem. However, if the CSUs

do not support this solution, use the Configuration Manager to edit the

connector of the backup line, click on Modem, and disable RI. DTR then goes

high only if the primary line becomes unavailable.

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Avaya Troubleshooting Routers Instrukcja Naprawy Strona 137