This phone system has been in place for almost three years, most of them trouble-free. It’s a 6102 with the very latest firmware. The phone is a Yealink T26P.
Client says the phone neither rings on inbound calls nor can make outbound calls. Phone shows as “idle” and “available” in the UCM extension screen. On the phone itself, on the account page it says “registered.”
However, on the UCM extension screen it is showing as being connected from the IP address of the LAN’s router, not the static IP that the phone is assigned when connecting to the LAN. It shows as port 1024, when the assigned port in the account settings on the phone is 5060. It does connect through a Netgear WiFi device, so that could be part of the problem - but it’s been running fine that way for a long time.