Nortel Networks NN44200-700 manual TroubleAction

16Chapter 3 Hardware troubleshooting

TroubleAction

The CallPilot Nortel server subnet does not work when the server is connected to a large Meridian 1 system.

•The other two LEDs indicate the IDE (I) and SCSI (S) activity of the following devices:

—IDE (I)

—SCSI (S)

If the Ethernet link LEDs are not on, check the Ethernet cabling.

Note: The link LEDs blink to indicate network activity.

The 201i server uses two auto-negotiating Ethernet network interface cards (NIC). When the NICs are connected to a 10/100Base-T port, they try automatically to negotiate transfer rates at the higher speed. The large Meridian 1 systems have filtered backplanes that generate loss on all signals, except on the signals routed to the bottom four pins (the ELAN subnet pins). As a result, the server can go into a loop or appear unresponsive on the Nortel server subnet.

•Use an unfiltered Ring/Tip cable supplied by Nortel.

or

•Remove the filter block on the back of the Meridian 1 newer systems and connect the switch directly to the 201i server I/O cable.

CAUTION

Dangerous voltage levels can be present in the back of the Meridian 1 switch. Use the proper cable, as indicated in the 201i Server Hardware Installation guide.

Nortel CallPilot

Troubleshooting Reference Guide

NN44200-700 01.05 Standard

5.026 June 2007

Copyright © 2007, Nortel Networks