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4600 Series IP Telephone LAN Administrator’s Guide
Error Conditions
5-4
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.
The telephone works properly except for the
speaker.
CAUSE: The Speaker was turned off on
the PBX.
RESOLUTION: Administer the PBX to
allow that station’s speaker to operate. If
that does not work, do a Self-test on the
telephone.
The telephone works properly, except incoming
DTMF tones are not received.
CAUSE: The TN2302AP board does not
pass in-band DTMF tones.
RESOLUTION: None; the board is
operating as designed.
Table 5-1. Some Error Conditions in Operation of 4600 Series IP Telephones —Continued
Condition Cause/Resolution