Duplex Mismatch; No Ring; Far-End Echo; Dropped Calls - Avaya Communication Server 1000 Installation And Commissioning Manual

Troubleshooting
Configuration problems are generally corrected by changing the configuration on the WLAN
IP Telephony 2245, the WLAN Application Gateway 2246, or the wireless handset.
There can also be incorrect programming of the APs. For compatibility and configuration
information about the APs in use at the site, see

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 ringing. This situation could occur when a wireless handset is
out of range of an AP for even a few seconds. If during 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 occurring, 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.
166 Avaya WLAN IP Telephony Installation and Commissioning
Compatible Access Points on page 257.
November 2010