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AP-4131 Access Point Product Reference Guide 201
4.10 Troubleshooting
Check the following symptoms and their possible causes before contacting
the Symbol Support Center.
4.10.1 Ensure wired network is operating
Verify AP operation:
1. AP does not power up:
– faulty AP power supply
–failed AC supply
– Electrical Management System (EMS) operating outlet.
2. After the AP resets and hardware is initialized, it performs an SRAM test.
If the test passes, the LEDs turn on. If the test fails, the LEDs all turn off
and the AP resets. The LEDs turn off sequentially as each test passes.
Identify wired network problems:
1. No operation:
– Verify AP configuration through Telnet or UI. Review procedures for
Ethernet and serial connection of the AP. Review AP firmware
revisions and update procedures.
– Verify network configuration by ensuring that there are no duplicate
IP addresses. Power down the device in question and ping the
assigned address of the device. Ensure no other device responds to
that address.
2. AP powered on but has no connection to the wired network:
– Check connections for proper wiring.
3. Verify network wiring and topology for proper configuration:
– Check that the cables used have proper pinouts and connectors.
– Verify router configuration and filtration setting.
– Verify MU operations.
– Confirm AP operation.
– Confirm AP and MU Net_ID (ESS).