Has anyone tried to use Microsoft dialer.exe with an IP trunk? We've got a custom auto dialer that uses it through Microsoft TSP and it works great for ALL calls to both digital phones and IP phones within the building. When we go off to the PSTN SOME calls ring and connect on the far end but never connect on the PC. Only thing we see for sure is that the PC never starts to send it's RTP stream even though it appears to be doing a handshake. Tried the same setup using a Cisco VG200 gateway and it behaved the same. Microsoft bug perhaps?