Hands-free module

Details Hands-free module Hands-free module

1993-11-12

1996-01-23

Eisenzopf, Reinhard J.

Telecommunications

Transmitter and receiver at same station

Having particular housing or support of a transceiver

455349, 455351, 379 58, 379420, H04B 138, H04M 908

Patent

active

054871824

ABSTRACT:
The invention relates to a hands-free module (2) for a mobile telephone (1). The hands-free module comprises a housing (11) and a cord (13) extending therefrom. Connected to the end of the cable distal from the housing is an external phone unit (14) and an external microphone (15). Mounted on the module is a connector (12) which connects the module housing (11) mechanically to the telephone housing (3) and which also connects the external phone unit (14) and the external microphone (15) electrically to the respective circuits of the internal loudspeaker and the internal microphone of the mobile telephone. The choice between the external and internal microphones is effected by a switch.

REFERENCES:
patent: 2895007 (1959-07-01), Soderbaum
patent: 3908094 (1975-09-01), Deluegue
patent: 4325142 (1982-04-01), Nakazawa
patent: 4654883 (1987-03-01), Iwata
patent: 4754484 (1988-06-01), Larkin et al.
patent: 4907266 (1990-03-01), Chen
patent: 4930156 (1990-05-01), Norris
DAK Industries Inc., Popular Science Aug. 1983, Headphone Phone.

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