Troubleshooting guide

Hardware
57
IP Phone IP Phone fails to boot Network Connection. Verify network connection
No power Verify power (is there a display?)
Faulty wiring or connection Check the wiring and connections
Check LED on the IP telephone for
network activity.
• A green LED on the bottom of the
phone indicates a proper
connection
• A flashing red LED indicates
activity (data flow) on the
network.
IP Phone IP Phone fails to boot. Set’s IP address cannot be
reached.
Use the PING (Packet Internet
Groper) on the IP telephone to
determine whether the server's
(3300 ICP, DHCP, and/or TFTP) IP
address is accessible.
DHCP programming. Ensure that the DHCP server has
been programmed with the correct
information. If a DHCP server is on
the 'other side' of a router from the IP
phone, then the router must have
DHCP forwarding enabled.
Note: IP sets require a firmware
upgrade to support the new DHCP
options introduced in 3300 Release
7.0; otherwise, the sets will fail to
boot. Such failures can occur, for
example, in a resilient cluster of
mixed software releases or when
sets with old firmware are added to
a controller after it was upgraded to
Release 7.0. For the sets to boot,
DHCP options 128-135 must be
present in the DHCP server. After
the sets have booted, options
128-135 may be removed to avoid
future conflicts with standardized or
other vendors use of these options.
If the IP telephone displays “TFTP
LOAD FAILURE” verify that the
TFTP Firmware, DSP and Main.
software loads are available and not
corrupted.
Table 15: General Phone Troubleshooting
Phone Symptom Probable Cause Corrective Action
Page 5 of 7