Mitel 3300 Technician's Handbook page 195

Table 44. Troubleshoot IP Phone Registration
Error Message on IP
Phone Display
TFTP load failure
TFTP load failure
TFTP load failure
Problems (continued)
Probable Causes
Option 128 is not set
up to point to the right
TFTP server
(Controller).
No network
connectivity between
the Controller and the
phone.
Firmware on
Controller is missing
or corrupted .
Troubleshooting
Corrective Action
Check the DHCP
server, and confirm
that option 128 is
pointing to the right
TFTP server (usually,
the Controller RTC IP
address).
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
router's MTU is set to 600
or more.
1.
Verify that the
firmware
(ipp510bootenc.bin,
etc.) is in the sysro/tftp
directory (particularly if
the user has manually
copied the firmware).
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