Hi Bruce,
It is extremely rare that an RRC fails. Usually it is a power supply, bad cable or something else.
If a system stopped working, it is a 99% probability that something in the environment changed
that has caused the problem, i.e. router, switch, etc.
Since he sees the web menu of the RRC, that is proof that the RRC is not the culprit. How is he
accessing it? Is he accessing it with the RRC's network, or outside? If outside, is he using the
dynamic DNS address, or the public IP number? Is your RRC using that number in your "SIP
Contact" field?
73,
Mitch DJ0QN / K7DX