Voice band-based data transmission system

Details Voice band-based data transmission system Voice band-based data transmission system

1996-08-15

2000-02-22

Ghebretinsae, Temesghen

Pulse or digital communications

Transceivers

Modems

455422, H04B 138

Patent

active

060288922

ABSTRACT:
A radiotelephone system provides a voice channel for carrying voice signals between a mobile unit and a called or calling unit. A first modem in the mobile unit and a second modem connected to a point along the voice channel employ a "blank-and-burst" method of communication to provide a data channel between a first data device connected to the mobile unit and a second data device connected to the second modem. The data channel enables the data devices to communicate with each other seemingly concurrently, and with minimal interference, with the voice signals that are being carried over the voice channel and without requiring modifications to any base station.

REFERENCES:
patent: 4654867 (1987-03-01), Labedz et al.
patent: 5682602 (1997-10-01), Walker et al.

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