Programming instructions

215
Troubleshooting
Waiting for link DHCP option
43 or 125 on
Release 7.0 or
later systems or
option 129 for
earlier
Releases is not
programmed
correctly.
Check Option 43, 125, or 129 on DHCP to
confirm that the IP address is programmed
correctly (RTC IP Address of controller).
The Layer 2
switch port may
be running
spanning tree.
Turn port fast on or disable Spanning tree
(whichever is possible).
The application
server is
broadcasting or
multicasting on
IP Phone port
or on PC
behind the IP
Phone.
Turn off multicasting.
The PC behind
the IP Phone is
changing speed
100/10.
Depending on the NIC, you may need to
hardcode to 100 MBps instead of auto
negotiation.
Waiting for link
OR
Lost link to
Server
IP phone fails to
receive
Keepalive
message in
30 seconds.
Verify if the network or the controller is
down.
There is
electrical
interference.
Verify the power source, and change the
location of the power source.
Table 27: IP Phone Registration Troubleshooting (continued)
Error Message
on Display
Probable
Cause
Corrective Action
(Page 5 of 6)