Cisco Technology, Inc.

Mark Conner

Yu Zhang

Sabita Jasty

Parameswaran Kumarasamy

Paul R P Chu

Sandeep Singh Bhupinder Kohli

Disclosed are a method, apparatus and system for interworking between H.320 or H.324 and SIP. The method comprises receiving a SIP message indicative of capabilities supported by a first endpoint device and deferring responding to the SIP message. The method further comprises receiving from a second endpoint device an H.320 or H.324 message indicative of the capabilities supported by the second endpoint device in response thereto responding to the SIP message thereby to establish a media communication channel between the first and second endpoint devices based on their respective capabilities.

Interworking between H.320/H.324 and SIP

In one embodiment, a method includes sending, from an originating gateway device (OGW) to a terminating gateway device (TGW), a setup message for setting up a call on a primary bearer channel (B-channel) of an Integrated Services Digital Network (ISDN). The OGW interconnects with a first Internet Protocol (IP) video endpoint, and the TGW interconnects with a second IP video endpoint. In response to an alerting message sent from the TGW, the OGW initiates procedures for synchronizing a plurality of secondary B-channels between the OGW and the TGW prior to the call entering into a connect state. It is emphasized that this abstract is provided to comply with the rules requiring an abstract that will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure.

Interconnecting IP video endpoints with reduced H.320 call setup time

In one embodiment, a system includes first and second gateway devices operable to communicate with respective first and second video terminals in accordance with H.323, the first and second gateway devices also being operable to communicate with each other over an H.320 call leg. Responsive to a first message received from the first video terminal that contains a terminal capability in H.245, the first gateway mapping the terminal capability into a non-standard section of an H.221 data stream, and send the data stream to the second gateway device. The second gateway device decoding the terminal capability from the non-standard section, encoding the terminal capability in H.245 in a second message, and sending the second message to the second video terminal. It is emphasized that this abstract is provided to comply with the rules requiring an abstract that will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure.

Growing community of inventors

Boulder Creek, CA, United States of America

Mark Conner