Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2005-12-05
2010-02-16
Chang, Kent (Department: 2617)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S445000, C370S338000, C370S352000
Reexamination Certificate
active
07664495
ABSTRACT:
Systems and methods provide a single E.164 number for voice and data call redirection and telephony services such as caller identification, regardless of in which type of network a dual mode mobile device operates. When the dual mode device registers and is active in a GSM network, temporary routing and status updates are triggered and resultant information is maintained in both networks. A mobile terminated call is routed through an enterprise WLAN with call control within the enterprise being handled by SIP or H.323 signaling, and the call is redirected to the mobile device in the GSM network, where call control is assumed by the SS7 network. Services are provided using the protocols native to the active network, and the single E.164 is used consistently along with or lieu of the temporary routing information for subscriber identity specific functions, such as caller identification and voice mail.
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Bonner Thomas Wayne
Enzmann Mark
Richardson Simon
Tran Nhan Thanh
AT&T Mobility II LLC
Chang Kent
Miller Brandon J
Parks IP Law LLC
Paulis Jonathan A.
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