Patent ID: 8547415

Claim:
A method for establishing simultaneous incoming connections from at least two remote video conferencing endpoints using a video conferencing device in a circuit switched network, the video conference device receiving calls on a first protocol layer from the at least two remote video conferencing endpoints, the method comprising: receiving, by the video conferencing device, on a second protocol layer, at least one sub-call having a sub-call ID; determining, by the video conferencing device, the sub-call ID of the at least one sub-call; in response to the sub-call ID identifying the at least one sub-call as a master sub-call, mapping, by the video conferencing device, a connection ID with a remote video conferencing endpoint of the at least two remote video conferencing endpoints transmitting the master sub-call, adding, by the video conferencing device, the connection ID to a queue of remote video conferencing endpoints from which to expect another sub-call, and transmitting, by the video conferencing device, framing on the at least one sub-call; in response to the sub-call ID not identifying the at least one sub-call as a master sub-call, retrieving, by the video conferencing device, the connection ID corresponding to the remote video conferencing endpoint, checking, by the video conferencing device, the queue whether the sub-call ID is already expected on another connection ID, adding, by the video conferencing device, the at least one sub-call to a queue of expected sub-calls in response to the sub-call ID already being expected on another connection ID, and transmitting, by the video conferencing device, framing on the at least one sub-call and removing the at least one sub-call from the queue of expected sub-calls in response to the sub-call ID not already being expected on another connection ID.