Question: Why is one VoIP stuck as Unregistered?
Background: We have a Cisco UC540 Small Business switch/router/voip combo. This phone was working until I powered everything down to install a larger UPS unit. The phone originally had a status of "Deceased". I removed the registration and tried to add it again. Now it just sits as "Unregistered". I even tried giving it another extension.
I am stuck using the Cisco Communication Assistant since this is small business hardware. There is very limited CLI access. Also, from what I heard, if you access the CLI with out cisco permission, you will void any warranty.
The phone in question is a Cisco SPA501G. It is connected to a SG300-28P. There are 5 other phones on this switch working just fine. I have tried other ports with no luck. Both the link and PoE lights are lit up.
Interesting part in the Debug log is:
- tons of ACK timeouts.
- Bad sequence number with fatal error 254, msg header is -1.
this appears to be the phone trying to register:
000565: Sep 7 10:59:04.549: Received StationRegisterMessage from phone SEP0002FDFFE166, sock 16 000566: Sep 7 10:59:04.549: TCB86BE8398 setting property TCP_TOS (11) 8A87B1C0 000567: Sep 7 10:59:04.549: ephone-(1) Register StationIdentifier DeviceName SEP0002FDFFE166 000568: Sep 7 10:59:04.549: ephone-1[0/-1][SEP0002FDFFE166]:stationIpAddr 10.1.1.15 000569: Sep 7 10:59:04.549: Skinny register (phones=14/14/41) REJECT from IP 10.1.1.15