Telephonic communications – With usage measurement – Call traffic recording by computer or control processor
Reexamination Certificate
2009-03-11
2011-11-08
Nguyen, Quynh (Department: 2614)
Telephonic communications
With usage measurement
Call traffic recording by computer or control processor
C379S201010, C379S232000
Reexamination Certificate
active
08054955
ABSTRACT:
According to one embodiment, a telephone system which realizes voice communication by using a packet network comprises an exchange which accommodates a telephone terminal as its extension and a call processing server which processes calls on the packet network. The exchange comprises a first trunk connected to the packet network, a second trunk connected to a public network having a different protocol from that of the packet network, a monitoring module which monitors the call processing server, and when a failure occurs in the call processing server, deactivates the first trunk, and a call control module which transfers a transmission request which is made from the telephone terminal to the packet network to the second trunk when the transmission request is made and performs a detour transmission to the public network in a status where the first trunk is inactive.
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Blakely , Sokoloff, Taylor & Zafman LLP
Kabushiki Kaisha Toshiba
Nguyen Quynh
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