Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Patent
1996-04-16
1998-09-29
Urban, Edward F.
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
455432, 455 133, 342354, 37910017, H04B 7185
Patent
active
058158090
ABSTRACT:
In a mobile satellite system, a mobile communication system includes a user interface system, an antenna system, a transceiver system, a logic and signaling system. The logic and signaling system provides a roam function permitting the mobile communication system to roam between the mobile satellite system and a terrestrial based communication system responsive to the user selection of a primary service and an alternate service. The mobile communication system also includes a digital terminal equipment unit initiating setup and release for a data call, and a facsimile interface unit initiating setup and release for a facsimile call. The facsimile interface unit generates a line control packet responsive to a line state transition indicating transmission of information associated with a new line state over a communication channel. The facsimile interface unit includes a look ahead buffer to perform early line control packet detection by looking ahead a predetermined time interval into a received satellite data stream and identifying a valid idle line control packet.
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Churan Gary G.
Ross David J.
Tisdale William R.
Ward Michael K.
AMSC Subsidiary Corporation
Urban Edward F.
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