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SX-200 ICP MX Technician’s Handbook
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.
TFTP Fail
(Remote IP phone
(statically
programmed IP
address) cannot
access the SX-200
ICP across the
WAN).
The Layer 2 switch port
for the phone interface
is shut down or not
configured properly.
Check the Layer 2 switch and ensure that
the port is not shut down.
For a Cisco Layer 2 switch: verify that this
is a trunk port with Dot1q encapsulation,
and ensure this trunk port allows both
native and voice LAN to pass through.
For an HP Layer 2 switch: verify that
Native Lan is untagged and Voice Lan is
tagged.
The Layer 2 switch port
for router interface is
shut down or not
configured properly.
Verify which configuration you have
Ensure the port(s) on both sides (Layer 2
switch and router) are not shut down.
If there is physical interface on the router
for each VLAN, make sure that the Layer 2
switch is set to access port for the
corresponding VLAN/subnet correctly; OR
If this is a router on a switch, verify that this
is a trunk port on L2 switch, and ensure
this trunk port allows both native and voice
LAN to pass through.
On the router’s subinterface, verify that the
proper VLAN is associated to the
subinterface.
Typo in IP address,
VLAN ID, gateway.
Delete and reprogram the static IP
address. If there is no VLAN or priority,
don’t put 0 and leave them as blank.
Verify that the gateway IP address is
correct.
Table 58: IP Phone Registration Troubleshooting (continued)
Error Message on
Display
Probable Cause Corrective Action
(Page 5 of 5)