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124 Troubleshooting
Duplex mismatch
A duplex mismatch on the WLAN can cause the wireless handsets to not
operate properly. Double-check WLAN connections and interfaces to ensure
that they are all configured as full-duplex.
No ring
It is possible in certain situations for a voice mail message to be left on a
wireless handset without the wireless handset ever r inging. This situation
could occur when a wireless handset is out of range of an AP for even a few
seconds. If dur ing the time the wireless handset is out of AP range and an
incoming call is received, the incoming call receives the Call Forward No
Answer (CFNA) treatment configured for that wireless handset, such as
forwarding the incoming call to voice mail.
To prevent this situation from occurr ing, ensure adequate AP coverage in all
areas where a wireless handset is used.
Far-end echo
Sometimes, when using the G.711 codec, echo might be perceptible at the
far end, and be more severe when the wireless handset is in an environment
with extreme background noise and the wireless handset volume is set
to maximum volume.
To correct this problem, reduce the volume setting on the wireless handset,
, the microphone gain or both.
You can change the microphone gain from the Standby Menu, Noise Mode.
Alternatively, if you experience this problem, consider using the G.729
codec.
Dropped calls
If calls are dropping, use the Site Survey mode of the wireless handset in
the area where the problem occurred to determine if there is inadequate AP
coverage in that area.
Nortel Communication Server 1000
WLAN IP Telephony Installation and Commissioning
NN43001-504 01.02 Standard
Release 5.0 15 June 2007
Copyright © 2004-2007, Nortel Networks
.