System and method for integrating multimedia services with traditional telephony via different networks

摘要

The present invention provides a combined user agent (14) CUA to represent a telephone (22) supported by a circuit-switched telephony switch (24) and a packet-based media device (18) as an integrated group (34) to other network entities (30). The CUA is configured to facilitate the necessary call signaling to establish and control a voice call via the telephony switch, as well as the session control signaling necessary to establish and control a media session with the media device. Accordingly, the telephone and media device appear to the network devices as a single device having voice and media capabilities, wherein the voice capabilities are controlled in part by the telephony switch.The present invention provides a combined user agent (14) CUA to represent a telephone (22) supported by a circuit-switched telephony switch (24) and a packet-based media device (18) as an integrated group (34) to other network entities (30). The CUA is configured to facilitate the necessary call signaling to establish and control a voice call via the telephony switch, as well as the session control signaling necessary to establish and control a media session with the media device. Accordingly, the telephone and media device appear to the network devices as a single device having voice and media capabilities, wherein the voice capabilities are controlled in part by the telephony switch.