BT MeetMe Services with Cisco 

BT MeetMe services with Cisco WebEx allow participants to join BT MeetMe reservationless conferences via VoIP (internet), provided the WebEx was scheduled by a host enabled with BT MeetMe VoIP or BT MeetMe with Dolby Voice integrated with WebEx.

Headset must be used - If sound is coming from the computer, check that the mic and speakers are configured for the USB headset. Making the VoIP connection - Once the installation is complete you will be prompted with a new choice in the WebEx "Audio Connection" popup: Call Using Computer