Troubleshooting VoIP and SIP on CME is pretty straightforward, but as with any feature on Cisco equipment, you need to know the magic commands that show the useful bits of information.
When phones register properly, they will generate console messages,
which you can see through Telnet or SSH if you’ve issued the
command. Here are the console messages that resulted when I turned on my
Feb 3 01:44:52.667: %IPPHONE-6-UNREGISTER_NORMAL: ephone-10:SEP001C42D1565D IP:192.168.10.1 Socket:7 DeviceType:Phone has unregistered normally. Feb 3 01:45:32.264: %IPPHONE-6-REG_ALARM: 25: Name=SEP001C42D1565D Load= 126.96.36.199 Last=Initialized Feb 3 01:45:32.268: %IPPHONE-6-REGISTER: ephone-10:SEP001C42D1565D IP:10.211.55.11 Socket:8 DeviceType:Phone has registered.
Here’s the message that resulted when I stopped the program without properly shutting it down (similar to unplugging an IP phone):
Feb 3 02:08:03.692: %IPPHONE-6-UNREGISTER_ABNORMAL: ephone-10:SEP001C42D1565D IP:192.168.10.1 Socket:7 DeviceType:Phone has unregistered abnormally.
To see if your ephones are properly registered, use the
show ephone command.
Here, you can see that the first two configured ephones are not
registered, but the third phone has registered properly. You can see
which buttons are configured, which numbers are assigned to those
buttons, and in what way:
sho ephoneephone-1 Mac:0019.AA96.D096 TCP socket:[-1] activeLine:0 whisperLine:0 UNREGISTERED mediaActive:0 ...