Avaya one-X Installation And Maintenance Manual page 50

Troubleshooting Guidelines
Table 3: Operational Error Conditions for 9600 Series SIP IP Telephones (continued)
Condition
The telephone works, but the
audio quality is poor, specifically:
The telephone works properly except for the
Speaker.
50 9600 Series SIP IP Telephones Release 1.0 Installation and Maintenance Guide
the user hears echo
when speaking on a
handset.
the user hears echo
on a headset, but not
on a handset.
the user is on Speaker
and hears no echo,
but the far-end hears
echo.
the user experiences
sudden silences such
as gaps in speech, or
static, clipped or
garbled speech, etc.
the user hears
fluctuations in the
volume level which
are worse when the
Speaker is on, or at
the beginning of a call,
or when a call goes
from no one talking
abruptly to a loud
voice.
Cause/Resolution
CAUSE: Echo from digital-to-analog conversion
on your CM call server trunk.
RESOLUTION: Verify which trunk is causing the
echo, and swap the trunk's Trunk Termination
parameter on the call server.
CAUSE: Improper headset adapter.
RESOLUTION: Replace adapter with Avaya's
M12LU or 3412-HIC adapters. We recommend
the M12LU, since it supports Automatic Gain
Control.
CAUSE: Room acoustics.
RESOLUTION: Ensure that there are six inches
or so of blank space to the right of the
telephone. If that is insufficient, use the handset.
CAUSE: Jitter, delay, dropped packets, etc.
RESOLUTION: You can have the user provide
diagnostic data by invoking the Network
Information feature under the A (Avaya) button
on the telephone. One or more Quality of
Service (QoS) features should be implemented
in the network as covered in
Administrative Options.
CAUSE: Improper non-Category 5 wiring.
RESOLUTION: Replace non-Category 5 wiring
with Category 5 wiring.
CAUSE: The user has changed the Automatic
Gain Control (AGC) or environmental acoustics
are not consistent with the current audio
settings.
RESOLUTION: Try different on/off settings for
the AGCHAND, AGCHEAD, and AGCSPKR
parameters.
CAUSE: The Speaker was disabled in the
settings file.
RESOLUTION: Check the settings file and
re-enable the Speaker if appropriate.
Chapter 3: Local
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