Mobile telephony

Details Mobile telephony Mobile telephony

2011-08-02

2011-08-02

Sam, Phirin (Department: 2476)

Multiplex communications

Communication over free space

Repeater

C455S431000

Reexamination Certificate

active

07990907

ABSTRACT:
An interface is provided between a satellite telephone system and a wireless telephone system for allowing calls to a user's wireless telephone to be diverted to a satellite telephone handset when the user is unable to use his wireless telephone, for example when on board an aircraft fitted with a satellite telephone system. The interface unit emulates the operation of a normal base station, so that the host wireless telephone system acts as if the mobile user's terminal is roaming on the host network, but is currently “busy”. The user inserts a card (which may be the SIM of his mobile phone, or a card compatible with existing satellite telephone equipment) into a suitable reader in the satellite telephone, which causes the satellite ground station's card verification system to connect to a host wireless telephone network.

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