Nortel CallPilot NN44200-700 Troubleshooting Manual page 16

16 Chapter 3 Hardware troubleshooting
Trouble
The CallPilot Nortel server
subnet does not work when
the server is connected to
a large Meridian 1 system.
Copyright © 2007, Nortel Networks
.
Action
•
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
5.0 26 June 2007