Multiplex communications – Pathfinding or routing – Combined circuit switching and packet switching
Reexamination Certificate
2005-11-15
2005-11-15
Ngo, Ricky (Department: 2663)
Multiplex communications
Pathfinding or routing
Combined circuit switching and packet switching
C370S389000, C370S401000, C709S238000
Reexamination Certificate
active
06965591
ABSTRACT:
A method for communication employs a plurality of gatekeepers and involves receiving at a first gatekeeper a request for information. If the information is not known by the first gatekeeper, a request is sent via a gatekeeper-level path to a second gatekeeper for the information. If the information is known by the second gatekeeper, it is returned along the original path to the first gatekeeper.
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AT&T Corp.
Duong Duc
Ngo Ricky
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