Wilan LIBRA 5800 AP, User Manual

Page: 97 / 156

June 2003 Rev 0 97
Troubleshooting
Preventative maintenance
Administering and maintaining your system properly can prevent many problems and alert you to
minor problems before they become serious. Some recommendations follow.
• Measure and document system performance at the time of the original installation.
• Change menu passwords so that only authorized people can reconfigure the system. See
Setting Menu Passwords , page 53.
• Maintain the integrity of the system design when adding to or changing a system.
The introduction of new elements to a system can cause problems unless you revise the
network plan to take into account the changes. For example, improper installation of a co-
located antenna can add unwanted system interference.
• Keep records of all changes. Especially document the addition of units, hardware and
software changes, and changes to configuration settings. Configuration errors often cause
other problems. Current records can be compared with original installation records and
function as benchmarks to help in troubleshooting.
• Keep a log of past and present problems and solutions. Store the log on-site for easy
reference, if possible. The log identifies common failure points and fixes.
• Before contacting Wi-LAN’s Technical Assistance Center, document the symptoms of the
fault and the steps taken to diagnose and fix the problem. Record the current configuration of
the system.
• Perform preventive maintenance at a regular interval, for example every six months. See
Appendix D: Linktest and Link Statistics , page 119 for information.
• Perform link monitor tests to verify the system after periods of extreme weather, and inspect
towers, antennas, ODUs, cables, and connectors for damage.
• Monitor system performance regularly. Environmental change as well as normal wear and
tear on components can affect system performance.
• In some cases a bench test is a useful tool in diagnosing problems. See Appendix E: Bench
Configuration Testing , page 123 for information on how to perform a bench test.