Incoming calls work fine. Outgoing calls ring the destination out on PSTN… when the destination answers, the calling party continues to hear ringing AND the party whom they called! Furthermore, the called party also hears the ringing. The call then drops with the timeout parameter is triggered in Dial.
Using asterisk 188.8.131.52, zaptel 1.2.5, and Wildcard TDM400P REV I Board 1.