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4600 Series IP Telephone LAN Administrator’s Guide
Error Conditions
5-4
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.
The M12LU is recommended, since it
supports Automatic Gain Control.
the user is on
speakerphone and
hears no echo, but the
far end hears echo.
CAUSE: Room acoustics
RESOLUTION: Ensure there are six
inches or so of blank space to the right of
the telephone. If that is insufficient, use
the handset.
The telephone works,
but the audio quality is
poor, specifically:
the user experiences
sudden silences (gaps
in speech), 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 phone 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 the triangle points
up. Also, check the Volume setting on
the telephone. Finally, do a Self-test on
the telephone.
Table 5-1. Some Error Conditions in Operation of 4600 Series IP Telephones—Continued
Condition Cause/Resolution