I seem to be having a strange problem with a sip trunk.
On a fairly frequent basis, I’ll make a call, ore receive a call, and there
will be NO sound. The strange part is that both endpoints are public IP
addresses so NAT isn’t in play and a sniffer trace reveals that the packets
simply aren’t being sent.
It only seems to happen on a particular trunk. The same phone calling on a
different trunk works just fine.