Programming instructions

181
Troubleshooting
General Troubleshooting Steps
Follow the steps below if you can’t find the problem when using the
troubleshooting tables in this chapter.
1. Verify the status of the LEDs (see page 331 for more information).
2. In the System Administration Tool, review the Alarm Details form
(Maintenance and Diagnostics). Identify and fix each alarm.
3. For IP Phone and physical network connectivity problems:
- Verify that the device has power.
- Verify the status of the port link integrity LEDs at each end of the
cable.
- Verify that each device transmits a link integrity pulse (LINK LED
on).
- If the link is down, try with another port.Verify that proper cabling is
installed between the end devices.
- Verify that a crossover cable was not installed instead of a
straight-though cable, and vice-versa.
4. For network media problems:
- If there is excessive noise, check for cabling problems.
- If there are excessive collisions, check for duplex mismatch
problems.
- For Cyclic Redundancy Check (CRC): check if there is a faulty NIC
card or flow-control.
- If there are excessive runt frames, check for bad cables, duplex
mismatches or bad PC NIC.
5. For network connectivity problems, identify the path between two end
devices by doing the following PING test (in order):
- Local
- Local gateway
- Remote gateway
- Remote IP.