Multiplex communications – Wide area network – Packet switching
Patent
1991-07-18
1993-08-17
Safourek, Benedict V.
Multiplex communications
Wide area network
Packet switching
375 5, 455 84, H04B 140
Patent
active
052375706
ABSTRACT:
A radiotelephone data transfer apparatus connects peripheral devices external to the radiotelephone and other user information inputting devices, such as a handset for a cellular mobile radiotelephone, to the radiotelephone's central processor and speech processor. The data bus apparatus generates frame formats in which the information is sent over the data bus. The frame formats are further subdivided into time slots, the time intervals in which individual messages are sent. The data transfer apparatus is configured so that messages sent to the cellular radiotelephone's speech processor are not flow controlled, while messages sent to the radiotelephone's central processor are flow controlled. Further, the radiotelephone's central processor controls operation of peripheral devices attached to the radiotelephone.
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Paggeot Bruce M.
Smolinske Jeffrey C.
Tripp Jeffrey W.
Jenski Raymond A.
Motorola Inc.
Safourek Benedict V.
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