Avaya 9608 Installation And Maintenance Manual page 76

Troubleshooting
Condition
The telephone works, but the audio quality
is poor, specifically:
76 H.323 Installation & Maintenance Guide R6.1
AND the telephone CAUSE: Loss of communication with the call
was recently moved. server.
RESOLUTION: As above, but pay particular
attention to the possibility that the telephone 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 telephone.
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: Verify which trunk is causing
the echo, and swap the trunk's Trunk
Termination parameter on the call server.
the user hears echo CAUSE: Improper headset cord.
on a headset, but not RESOLUTION: Ensure that an Avaya-
on a handset. approved headset cord 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. telephone. If that is insufficient, use the
handset.
the user experiences CAUSE: Jitter, delay, dropped packets, etc.
sudden silences such RESOLUTION: You can have the user provide
as gaps in speech, or diagnostic data by invoking the Network
static, clipped or Information feature under the A (Avaya Menu)
garbled speech, etc. or Home button on the telephone. One or more
Quality of Service (QoS) features should be
implemented in the network as covered in
Chapter
Options
CAUSE: Improper non-Category 5 wiring.
RESOLUTION: Replace non-Category 5
wiring with Category 5 wiring.
the user hears CAUSE: The user has changed the Automatic
fluctuations in the Gain Control (AGC) or environmental
Cause/Resolution
3:Using Local Administrative (Craft)
on page 33.
May 2011