Multiplex communications – Communication over free space – Using atm as a wireles protocol
Reexamination Certificate
2006-11-28
2006-11-28
Pham, Chi (Department: 2664)
Multiplex communications
Communication over free space
Using atm as a wireles protocol
C370S310000, C370S325000, C455S557000, C455S465000, C455S447000, C455S448000, C455S443000, C710S064000, C710S072000
Reexamination Certificate
active
07142519
ABSTRACT:
A cordless modem system where a mobile station unit (MSU) is located in the computer and a base station unit (BSU) is connected to the telephone line. A radio frequency (RF) link is developed between the two units to allow a cordless connection. A series of commands are used between the two units to allow the MSU to request a channel, the BSU to grant a channel, the BSU to notify of a ring, and the MSU to request the BSU to go off hook. In addition, there is preferably a command sequence to allow authorization of a particular MSU or BSU. There are two full duplex channels in each MSU and BSU. This allows multiple BSUS and MSUS to be utilized in a small area. Communications between the two units are secure based on address values for each 15 unit contained in the various commands.
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Fulton Paul R.
Saadeh Said S.
Hewlett--Packard Development Company, L.P.
Jain Raj
Pham Chi
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