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Troubleshooting the handset 117
Context
When troubleshooting a problem with a wireless handset, it is important to
determine the context of when and where the problem occurred. Context
includes the following:
•
Was the wireless handset on an active call?
•
Was the wireless handset moving or stationary?
•
Was the wireless handset powering on or powering off?
• Was PTT being used?
• At what location did the problem occur?
Record this information and provide it to the system administrator or Nortel
Technical Support.
Access Point problems
Most, but not all, wireless handset audio problems are related to AP range,
positioning, and capacity. Performing a Site Survey as described in “Site
survey” (page 33) can isolate the AP causing these types of problems. If
the wireless handset itself is suspected, conduct a parallel site survey with
a wireless handset that is known to be functioning properly.
The following are some situations that can cause wireless handset
difficulties to occur:
• In range/Out of range—service is disrupted if a user moves outside
the area covered by the WLAN APs. Service is restored if the user
moves back within range. If a call drops because a user moves out of
range, the wireless handset recovers 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
can be filled. If this happens, the user hears three chirps from the
wireless 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 can
be the same as moving out of range.
• Transmission Obstructions—before system and AP installation,
the best location for APs for optimum transmission coverage is
determined when a site survey is performed. However, small pockets
of obstruction can still be present, or obstructions can be introduced
into the facility after AP installation. This loss of service can be
restored by moving out of the obstructed area, or by adding more APs.
Nortel Communication Server 1000
WLAN IP Telephony Installation and Commissioning
NN43001-504 03.04 Standard
23 September 2008
Copyright © 2004–2008 Nortel Networks
.