Multiplex communications – Pathfinding or routing – Combined circuit switching and packet switching
Reexamination Certificate
2006-03-07
2006-03-07
Duong, Frank (Department: 2666)
Multiplex communications
Pathfinding or routing
Combined circuit switching and packet switching
C379S225000, C379S413020
Reexamination Certificate
active
07009962
ABSTRACT:
A method is described that comprises receiving a ringing voltage or tip-ground signal at a first telephone interface. Then, indicating to a control system at an interface that the ringing voltage or tip-ground signal is appearing at the first telephone interface. Then, calling a remote device over a packet data network while maintaining the first telephone interface in an on-hook state. The control system causes the calling in response to the indicating.
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Chung Wing-Kuen
Hwang Cherng-Daw
Tasker Michael
Cisco Technology Inc.
Duong Frank
Harper Kevin C.
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