Telecommunications – Radiotelephone system – Auxiliary data signaling
Reexamination Certificate
2007-01-16
2007-01-16
Gelin, Jean (Department: 2617)
Telecommunications
Radiotelephone system
Auxiliary data signaling
C455S408000, C455S445000
Reexamination Certificate
active
09744677
ABSTRACT:
The invention relates to a telecommunication method and a system suitable for same for establishing a connection with a mobile station, for example a GSM mobile telephone, of a subscriber located in a visited public land mobile network. According to said method the calling mobile subscriber in the visited public land mobile network prepares a short message, for example an unstructured supplementary service data message with the desired destination number and sends said message, which is then transmitted to a callback computer which establishes a connection between the calling mobile subscriber and the desired destination number. A connection to a called mobile subscriber in a visited public land mobile network is established by a callback computer whose number is assigned to the called mobile subscriber in the home location register. Before a connection is established the remaining credit and airtime of the mobile subscriber is verified in a prepaid module connected to the callback computer, on the basis of prepaid amounts or with the aid of at least one schedule of telephone tariffs and on the basis of a location of said subscribers stored in the home location register of the home public land mobile network.
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Hirzel Werner
Koch Michael
Meier Martin
Stadelmann Anton Niklaus
Bhattacharya Sam
Gelin Jean
Swisscom Mobile AG
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