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Troubleshooting Guidelines
130 4600 Series IP Telephone LAN Administrator Guide
The telephone works, but the
audio quality is poor, specifically:
the user hears echo
when speaking on a
handset.
CAUSE: Echo from digital-to-analog
conversion on your Avaya Media Server trunk.
RESOLUTION: Verify which trunk is causing
the echo, and swap the trunk’s Trunk
Termination parameter on the PBX.
the user hears echo on
a headset, but not on a
handset.
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.
the user is on Speaker
and hears no echo, but
the far-end hears echo.
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.
the user experiences
sudden silences such
as gaps in speech, or
static, clipped or
garbled speech, etc.
CAUSE: Jitter, delay, dropped packets, etc.
RESOLUTION: One or more Quality of
Service (QoS) features should be implemented
in the network. See Chapter 3 of the 4600
Series IP Telephone Installation Guide.
CAUSE: Improper non-Category 5 wiring.
RESOLUTION: Replace non-Category 5
wiring with Category 5 wiring.
The 4612 or 4624 IP Telephone works
properly except the telephone does not ring.
CAUSE: The Ringer Off (RngOF) softkey
feature has been activated.
RESOLUTION: Use the softkey Menu option
to access the RngOF feature. A
downward-pointing triangle means the Ringer
is off. Ensure that the triangle points up. Also,
check the Volume setting on the telephone.
Finally, do a self-test on the telephone.
Table 14: Some Error Conditions in Operation of 4600 Series IP Telephones (continued)
Condition Cause/Resolution
3 of 6