Multiplex communications – Pathfinding or routing – Combined circuit switching and packet switching
Reexamination Certificate
2011-08-02
2011-08-02
Wilson, Robert W (Department: 2475)
Multiplex communications
Pathfinding or routing
Combined circuit switching and packet switching
C370S208000, C370S210000, C370S430000, C709S224000, C709S239000
Reexamination Certificate
active
07990953
ABSTRACT:
A distributed VoIP system includes a network and a first switch at a first site coupled to the network. The first switch is configured to provide telephony services to a first communication device. The system also includes a second switch at a second site coupled to the network. The second switch is configured to provide telephony services to a second communication device. The system also includes a spare switch coupled to the network. The spare switch is configured to provide telephony services to the first communication device if the first communication device is unable to register with the first switch, and the spare switch is configured to provide telephony services to the second communication device if the second communication device is unable to register with the second switch.
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Burns Robert R.
Cheng Andy A.
Okita Glen K.
Kamara Mohamed
Kilpatrick Townsend & Stockton LLP
Shoretel, Inc.
Wilson Robert W
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