Programming instructions

214
3300 ICP Technician’s Handbook
TFTP load
failure
DHCP option
43 or 125 on
Release 7.0 or
later systems or
option 128 for
earlier
Releases is not
set up to point
to the right
TFTP server
(Controller).
Check the DHCP server, and confirm that
option 43, 125, or 128 is pointing to the
right TFTP server (usually, the controller
RTC IP address).
No network
connectivity
between the
controller and
the phone.
1. Confirm that the controller is connected
to the network.
2. For a Cisco L2 switch: verify that the L2
switch is access port (Voice LAN).
3. For an HP L2 switch: verify that the L2
switch is untagged (Voice LAN).
4. If the router is involved, make sure that
the router's MTU is set to 600 or more.
Firmware on
controller is
missing or
corrupted.
1. Verify that the firmware
(ipp510bootenc.bin, etc.) is in the
sysro/tftp directory (particularly if the
user has manually copied the firmware).
2. Confirm if TFTP on the controller is
corrupted (this can be verified by
connecting the IP Phone directly on the
controller, or by observing the behavior of
other IP Phones).
Tips: If you have Option 132/133
programmed on the controller’s internal
DHCP server, disable them before trying
Step 2.
Table 27: IP Phone Registration Troubleshooting (continued)
Error Message
on Display
Probable
Cause
Corrective Action
(Page 4 of 6)