Cisco Phone Hard Reset!

Sometimes phones don't respond to the call manager. Symptoms may include black screen, "Phone Registering", or other abnormal behavior. 

The best (and only) way to troubleshoot this is to do a hard reset. Follow along in the 40 second video above, or follow the steps:

1. Unplug phone in back.
2. Wait 5 seconds.
3. Hold # on the front of the phone, and plug phone back in.
4. In order, push: 123456789*0#
5. Wait 1-3 minutes for phone to boot up.
6. Sometimes a hard reset doesn’t work the first time. If needed, repeat hard reset 1-3 additional times.

Additional troubleshooting steps are to double check that the phone is plugged in, try plugging the phone into a different ethernet port, or try a different ethernet cable.