I have a SIP trunk to a voice contactportal.
If I try to make a call via this to an internal handset it works ok, if I try to make a call to a PSTN Number then I get one way voice, the ip handset can't hear the PSTN caller.
I have got a sniffer trace and it appears that the Skinny start media has the ip address of the subscriber not the voice gateway.
Has anyone seen this before?
Gateway is MGCP