Avaya H.323 9608 Installation And Management Manual page 82

Troubleshooting
Condition
The phone works, but the audio quality is
poor, specifically:
82 Installing and maintaining Avaya IP Deskphone H.323 9608, 9608G, 9611G, 9621G, and 9641GJanuary 2014
The display might RESOLUTION: Check LAN continuity from the
show "System Busy." call server to the phone using ARP or trace-
route and from the phone to the call server by
invoking a Feature button. Verify that LAN
administration has not changed for the
Gatekeeper, TN 2302AP boards, or the LAN
equipment (routers, servers, etc.) between the
switch and the phone.
Verify that telephone settings are not changed
locally using VIEW and ADDR information, as
described earlier in this guide. Verify that the
telephone volume is set high. Finally, conduct
a self-test.
AND the phone was CAUSE: Loss of communication with the call
recently moved. server.
RESOLUTION: As above, but verify whether
the phone is being routed to a different DHCP
server, or even a different call server switch. If
so, the new server or switch might need to be
administered to support the phone.
AND the network was CAUSE: Loss of communication with the call
recently changed to server.
upgrade or replace RESOLUTION: As above.
servers, re-
administer the Avaya
Media Server, add or
change NAT, etc.
the user hears echo CAUSE: Echo from digital-to-analog
when speaking on a conversion on your Avaya Media Server
handset. trunk.
RESOLUTION: Identify the trunk that is
causing the echo, and swap the Trunk
Termination parameter for that trunk on the call
server.
the user hears an CAUSE: Improper headset cord.
echo on a headset, RESOLUTION: Ensure that an headset cord
but not on a handset. approved by Avaya is being used.
the user is on CAUSE: Room acoustics.
Speaker and hears RESOLUTION: Ensure that there are six
no echo, but the far- inches or so of blank space to the right of the
end hears echo. phone. If that is insufficient, use the handset.
the user experiences CAUSE: Jitter, delay, dropped packets, etc.
sudden silences such
Comments? infodev@avaya.com
Cause/Resolution