Programming instructions

211
Troubleshooting
Table 27: IP Phone Registration Troubleshooting
Error Message
on Display
Probable
Cause
Corrective Action
Invalid VLAN ID DHCP Option 43
or 125 on
Release 7.0 or
later systems or
132 and/or 133
for earlier
releases not set
correctly.
1. Identify the location of DHCP server and
which DHCP server is assigned the IP
address for the corresponding subnet (see
page 317 for examples).
2. For an external Microsoft DHCP server (NT
server, etc.), make sure that the option type
is set to LONG.
Note: For Windows 2000, refer to
page 308.
3. For a Cisco
®
Router DHCP server, make
sure that the option type is set to hex, and
padded with 0s (for example, 0x00000002
for VLAN 2).
4. For the controller internal DHCP server, set
the option type to numeric.
Duplicated IP
address
Existing data
device owns the
IP address.
1. Check the IP address on the phone display.
2. Disconnect the IP Phone.
3. From a PC on the same subnet, ping the
suspected IP Phone. If there is a response,
identify the data device, and resolve the
conflict.
Corrupted DHCP
server
1. On the suspected DHCP server, disable
then recreate the scope.
2. If this is a Microsoft DHCP server, reboot
the server.
DHCP discovery
OR
DHCP OFFER X
REJ
DHCP option 43
or 125 on
Release 7.0 or
later systems or
option 130
(MITEL IP
PHONE) for
earlier Releases
is not
programmed.
Identify the location of DHCP server and set to
Option 130 as String type with value of
“MITEL IP PHONE”.
DHCP server
does not have
enough IP
addresses.
Create a larger scope with more IP addresses
on the DHCP server.
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