Method and apparatus for error-free digital data transmission du

Details Method and apparatus for error-free digital data transmission du Method and apparatus for error-free digital data transmission du

1989-04-07

1990-03-27

Lev, Robert

Telephonic communications

Audio message storage, retrieval, or synthesis

155 33, 155 54, 379 63, 379 59, H01Q 704

Patent

active

049127560

ABSTRACT:
A system for providing error-free data communication between first and second personal computers over a conventional cellular telephone system includes an interface adapter coupling the first personal computer to the TDATA, CDATA, and RDATA conductors of a Cellular Subscriber Equipment unit and a cellular connector coupling a modem of the first personal computer to the audio R.sub.x and T.sub.x conductors of the Cellular Subscriber Equipment unit. Data communication between the first and second personal computers is carried over the voice channel of the cellular telephone system. The interface adapter recognizes imminent interfering activity such as a handoff or power adjustment operation or multipath fading by monitoring the TDATA, CDATA, and RDATA conductors of the control channel of the cellular telephone system and so informs the first personal computer. The first personal computer executes a bus monitor program that halts the data communication between the first and second personal computers until the interfering activity is completed.

REFERENCES:
patent: 4369516 (1983-01-01), Byrns
patent: 4613990 (1986-09-01), Halpern
patent: 4654867 (1987-03-01), Labedz et al.
patent: 4696027 (1987-09-01), Bonta
patent: 4697281 (1987-09-01), O'Sullivan
"Firm Unveils Cellular Bridge" Infoworld by Jim Bartimo, 7/2/84, pp. 11-12.
"Solving Cellular Data Transmission Problems" Telephony, Dec. 1, 1986, by Greg Fontana, pp. 36-40.

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