Has anyone got this bug with firmware 7.5.7?
https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvc22026
Basically, the phone is stuck without being registered and you cannot use the web interface.
The known affected release was 7.6.2 and it's been fixed in 7.6.2b.
The phone is not receiving anything like below:
I get the bug once in a while and was wondering if it's related.