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Troubleshooting Guidelines
Error Conditions
5-3
The telephone had been
working, but does not
work now,
AND no lights are lit on
the phone and the
display is not lit.
CAUSE: Loss of power.
RESOLUTION: Check the connections
between the telephone, the power
supply, and the power jack.
AND power to the
telephone is fine, but
there is no dialtone.
(Display might show
“System Busy”.)
CAUSE: Loss of communication with the
PBX switch
RESOLUTION: Check LAN continuity
from the PBX to the telephone (using
ping or trace-route) and from the
telephone to the PBX (by invoking a
feature button). Verify the LAN
administration has not changed for the
Gatekeeper or TN 2302AP boards or the
LAN equipment (routers, servers, etc.)
between the switch and the telephone.
Verify no one has locally changed the
telephone settings (by using the VIEW
and ADDR codes, as described in the
4600 Series IP Telephone Installation
Guide). Verify the volume on the
telephone is set high enough. Finally,
conduct a self-test.
AND the telephone was
recently moved.
CAUSE: Loss of communication with the
PBX.
RESOLUTION: As above, but pay
particular attention to the possibility that
the telephone is being routed to a
different DHCP server, or even a
different PBX switch. If so, the new
server or switch may need to be
administered to support the telephone.
AND the network was
recently changed
(servers upgraded or
replaced, your Avaya
media server is re-
administered, NAT has
been added or changed,
etc.).
CAUSE: Loss of communication with the
PBX.
RESOLUTION: As above.
Table 5-1. Some Error Conditions in Operation of 4600 Series IP Telephones—Continued
Condition Cause/Resolution