Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2007-07-10
2007-07-10
Gesesse, Tilahun (Department: 2618)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S433000, C455S435100, C455S552100, C370S352000
Reexamination Certificate
active
10036878
ABSTRACT:
The invention relates to a method and system for establishing a first type of connection, wherein a handshake processing is performed with the other party of the first type of connection. If the handshake processing is successful, the first type of connection is established. If the handshake processing is not successful, i.e. the other party does not support the first type of connection, a fallback procedure is started to change the call to a second type of connection determined during the connection establishment. The change to the second type of connection may be performed directly or may be based on a call retry procedure. Thereby, inconvenient disconnections or error processings at the end terminals can be prevented.
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Gesesse Tilahun
Nokia Corporation
Squire Sanders & Dempsey L.L.P.
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