Cellular phone interface for a simultaneous voice/data modem

Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail

Patent

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375222, 370493, H04M 1100

Patent

active

057110123

ABSTRACT:
An new cellular interface directly couples the speaker and microphone of a cellular telephone to a simultaneous voice and data (SVD) modem. This interface allows a cellular telephone user to use their cellular telephone for simultaneous voice and data communications over the cellular network. In addition, of the SVD modem has a port coupled to a switched facility of a switching system, this cellular interface allows the cellular telephone user to place a telephone call from their cellular telephone over the switched facility.

REFERENCES:
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patent: 4972457 (1990-11-01), O'Sullivan
patent: 4991197 (1991-02-01), Morris
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patent: 5559792 (1996-09-01), Bottoms
patent: 5581560 (1996-12-01), Shimada
patent: 5594952 (1997-01-01), Virtuoso
patent: 5602902 (1997-02-01), Satterlund
patent: 5617423 (1997-04-01), Li
AB3X Cellular Interface Owner's Manual, Morrison & Dempsey Communications, 16 Nov. 1987. pp. 4, 14.

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