Avaya 3641 - Chapter Twelve: Troubleshooting; Access Point Problems

Avaya 3641/3645/6120/6140 IP Wireless Handset SIP Administration Guide June 2012 97
Chapter Twelve: Troubleshooting
In certain scenarios, transmission problems may occur due to any number of factors
originating from the wireless LAN. Avaya 3641/3645/6120/6140 IP Wireless Handsets
can exhibit transmission problems in several ways. They can cease functioning properly,
display error messages, or display incorrect data. When using and troubleshooting
handsets, consider the following problem sources to determine the best method of
approaching any specific situation.
Access point problems
Handset audio problems are related to AP range, positioning, and capacity. Performing
a site survey as described in this document can isolate the AP causing these types of
problems. If the handset itself is suspected, conduct a parallel site survey with a handset
that is known to be properly functioning.
In range/out-of-range
Service will be disrupted if a user moves outside the area covered by the wireless LAN
APs. Service is restored if the user moves back within range. If a call drops because a
user moves out-of-range, the handset will recover the call if the user moves back into
range within a few seconds.
Capacity
In areas of heavy use, the call capacity of a particular AP may be filled. If this happens,
the user will hear three chirps from the handset. The user can wait until another user
terminates a call or move within range of another AP and try the call again. If a user is
on a call and moves into an area where capacity is full, the system attempts to find
another AP. Due to range limitations, this may be the same as moving out of range.
Transmission obstructions
Prior to system installation, the best location for APs for optimum transmission coverage
should have been determined. However, small pockets of obstruction may still be
present, or obstructions may be introduced into the facility after system installation. This
loss of service can be restored by moving out of the obstructed area or by
adding/rearranging APs.