Multiplex communications – Pathfinding or routing – Combined circuit switching and packet switching
Reexamination Certificate
2005-11-07
2011-12-27
Moore, Ian N (Department: 2468)
Multiplex communications
Pathfinding or routing
Combined circuit switching and packet switching
C370S353000, C370S356000, C370S392000, C370S355000, C379S220010
Reexamination Certificate
active
08085757
ABSTRACT:
A telephone number of the callee is received from a caller device. An Internet protocol Multimedia Subsystem (IMS)-based telephone number mapping (ENUM) query is constructed based on the telephone number of the callee. An ENUM database is queried based on the ENUM query. If a response to the ENUM query is absent a Session Initiation Protocol (SIP) Uniform Resource Indicator (URI) or a telephone (TEL) URI, the telephone number is resolved into one or more non-SIP
on-TEL URIs usable to communicate with the callee. The caller is enabled to use the caller device or other devices to select which of the one or more non-SIP
on-TEL URIs to use to communicate with the callee. For each caller-selected non-SIP
on-TEL URI, communication in a protocol associated with the URI is initiated between the caller and the callee using the caller device or other devices.
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Ku Bernard Siu-Man
Yasrebi Mehrad
AT&T Intellectual Property I L.P.
Kassim Khaled
Moore Ian N
Toler Law Group
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