Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Protection at a particular protocol layer
Reexamination Certificate
2006-06-27
2006-06-27
Sheikh, Ayaz (Department: 2136)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Protection at a particular protocol layer
C713S152000, C713S168000, C713S169000, C379S229000, C379S231000, C379S265080
Reexamination Certificate
active
07069432
ABSTRACT:
A method is provided for establishing a telephone call between a trusted Internet Protocol (IP) telephone and an untrusted device. The method includes receiving a call initiation request from the untrusted device that indicates a desired communication with the trusted IP telephone. The method evaluates the call initiation request, and establishes a telecommunication link between the untrusted device and the trusted IP telephone in response to a positive evaluation of the call initiation request.
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Bell Robert T.
Higgins Ronald D.
Platt Richard B.
Tighe James R.
Baker & Botts L.L.P.
Cisco Technology Inc.
Colin Carl G.
Sheikh Ayaz
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