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Telephone Management and Troubleshooting
82 4620/4620SW/4621SW IP Telephone User Guide
Audio quality is poor,
specifically, you hear an echo
while using a handset, static,
sudden silences (gaps in
speech), clipped or garbled
speech, etc.
Various potential network problems might be
causing the problem.
Access the Network Audio Quality screen
(described in Viewing the Network Audio Quality
in Chapter 6: 4620/4620SW/4621SW IP
Telephone Options) to provide your System
Administrator with specific information related to
this problem.
Contact your LAN Administrator with as
complete a description of the problem as
possible.
No dial tone Check that both the handset and line cords into
the phone are securely connected. Note that
there might be a slight operational delay if you
unplug and reconnect the phone.
Reset or power cycle the phone with your
System Administrator’s assistance. (See the
section titled Resetting and Power Cycling the
IP Telephone for details.)
Contact your System Administrator if these
steps do not produce the desired result.
A feature does not work as
indicated in this guide (for
example, the Redial button
does not operate as described)
Verify the procedure and retry. For certain
features, you must lift the handset first or place
the phone off-hook.
Contact your System Administrator if this action
does not produce the desired result. Your
telephone system might have been specially
programmed for certain features applicable only
to your installation.
All other IP Phone problems Contact your System Administrator.
Problem/Symptom Suggested Solution (continued)
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