Multiplex communications – Communication over free space – Having a plurality of contiguous regions served by...
Reexamination Certificate
2008-01-08
2008-01-08
Pham, Chi (Department: 2616)
Multiplex communications
Communication over free space
Having a plurality of contiguous regions served by...
C370S400000, C455S432100
Reexamination Certificate
active
10835632
ABSTRACT:
The present invention provides a method and system for assuring H.323 alias address portability to an H.323 user in real-time H.323 multimedia communications where the H.323 user is registered with a home gatekeeper for the home zone of the H.323 user. Alias address portability may be obtained using a central database that is known to the administrative zones and is used for alias address mapping, or alternatively, may be obtained by using a distributed database. The method may be implemented by: sending, by the H.323 user, a message with a called H.323 entity's alias address, to the home gatekeeper to originate a call to the called H.323 entity; confirming that the alias address, services, and service providers are portable; converting the alias address to a called routable alias address for the called H.323 entity and sending the alias address to the H.323 user; and placing the call to the called H.323 entity.
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AT&T Corporation
Haynes Michael N.
Jensen Dale R.
Michael Haynes PLC
Pham Chi
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