here is the results of running cl during the call. cl Conference ports: Port #00[16KHz/20ms/1] default transmitting to: #3 Port #01[16KHz/20ms/1] ringback transmitting to: Port #02[16KHz/20ms/1] ring transmitting to: Port #03[ 8KHz/20ms/1] sip:xxxxxxxxxxx at sip.diamondcard.us transmitting to: #0