Patent ID: 8861703

Claim:
A method executed by a group call server, for reestablishing a voice communications session moderated by the group call server between two or more telephony devices participating in a group communications session, wherein the group call server has access to group call information, the group call information including information useable for reestablishing participation by a telephony device in the group communications session, and the group call information including call leg information associated with the participating telephony device, the method comprising: automatically detecting disconnection of the participating telephony device from the group communications session, and automatically determining that the disconnection was not intentionally initiated by: comparing, said call leg information to active call legs in the group communications session, and determining that number of current active call legs is less than a previously determined number of active call legs; and sending signals adapted to invite reestablishment of participation by the disconnected telephony device in the group communications session to the disconnected telephony device; and upon receipt by the group call server from the disconnected telephony device of signals representing a request to reconnect the disconnected telephony device with the group communications session, outputting command signals that reestablish a communications session between the disconnected participating device and one other device participating in the group communications session, using the group call information.