Method of switching a call to a multipoint conference call in a

Details Method of switching a call to a multipoint conference call in a Method of switching a call to a multipoint conference call in a

1998-09-09

2000-01-25

Kontz, Curtis A.

Television

Two-way video and voice communication

User positioning

348 16, 379202, H04N 714

Patent

active

060183608

ABSTRACT:
A method of switching a call to a multipoint conference call includes sending a message (201) from a first terminal (105-T1) to a gatekeeper (102) which provides address translation and control access to a shared network medium (101). The call is initially established as a point to point communication between first terminal (101) and a second terminal (105-TN) over shared network medium (101) while complying with H.323 standard. Message (201) contains a request for the multipoint conference call. The method furthermore includes selecting a multipoint control unit (104) connected to shared network medium (101) to allocate resources for the multipoint conference call, and then switching the call to the multipoint conference call via the allocated resources. Thereby, the initial call is switched to a multipoint conference call without interrupting the initial call.

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ITU-T Telecommunication Standardization Sector of ITU H.245 (Mar. 1996); Series H:Audiovisual and Multimedia Systems Infrastructure of Audiovisual Services--Communication Procedures "Control Protocol for Multimedia Communications".
ITU-T Telecommunication Standardization Sector ITU H.323 (Nov. 1996); Series H: Audtiovisual and Multimedia Systems Infrastructure of Audiovisual Services--Systems and Terminal Equipment for Audiovisual Services "Visual Telephone Systems and Equipment for Local Area Networks which Provide a Non-Guaranteed Quality of Service".

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