Multiplex communications – Pathfinding or routing – Combined circuit switching and packet switching
Reexamination Certificate
2006-01-17
2006-01-17
Pezzlo, John (Department: 2662)
Multiplex communications
Pathfinding or routing
Combined circuit switching and packet switching
C370S466000
Reexamination Certificate
active
06987757
ABSTRACT:
When a call is set between a first line switching network of a call-out side and a second line switching network of a call-in side, a first gateway, if receives a call setting message from the first line switching network, transmits a inquiry message to at least one of second gateway. Each of second gateway from which received the inquiry message transmits a response message to the first gateway when a second gateway itself can communicate a call setting message to the second line switching network. Thereafter, the first gateway selects a second gateway for transmitting the call setting message within the second gateways to which transmitted the response message, and transmits the call setting message to the selected second gateway.
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Akiyama Masanori
Ohtsu Kazuyuki
Mills Donald L
Pezzlo John
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