Network-Administered Conference Call Using SIP Messaging

摘要

Methods, systems, and apparatus can be used for the establishment of a conference call via a packet network (which may be an IP fixed packet network) administered by a communications server, including a Session Initiated Protocol (SIP) based server.

主权项

1. A method for establishing a conference call between a VoIP device, a first peer device, and a second peer device, the method comprising:
sending a first session request through a fixed packet network to a communications server, wherein the first session request is used to establish a first communication session between the VoIP device and the first peer device; sending a request to place the first communication session between the VoIP device and the first peer device in an on hold condition, wherein the on hold condition is maintained by one or more operational states at the VoIP device or first peer device; and while the first communication session between the VoIP device and the first peer device is maintained in an on hold condition:
receiving at the VoIP device an indication message from the communications server, wherein the indication message informs the VoIP device that the VoIP device may begin transmitting information that is needed by the communications server to initiate a second communication session between the VoIP device and the second peer device; andsending a second session request, wherein the second session request comprises one or more signals carrying information that is used to initiate the second communication session between the VoIP device and the second peer device.