Telecommunications – Radiotelephone system – Including private cordless extension system
Patent
1996-01-31
2000-06-27
Bost, Dwayne D.
Telecommunications
Radiotelephone system
Including private cordless extension system
455569, H04Q 732
Patent
active
060817240
ABSTRACT:
A portable communications device and accessory system which enables both voice and control commands to be communicated between a portable communication device and external accessories over a single flexible digital interface. When the portable communication device is interfaced to external accessories, such as a power booster and hands-free kit, a microprocessor configures the serial communications bus to pass both the digital voice data and digital control commands to and from the external power booster and the hands-free kit. The external hands-free kit contains its own auxiliary CODEC for encoding analog voice signals and decoding the digital voice data. When the portable communication device is not interfaced with external accessories, the microprocessor configures the serial communication bus to pass the digital voice data to and from an internal CODEC for use with the portable device's own microphone and speaker.
REFERENCES:
patent: 4369516 (1983-01-01), Byrns
patent: 4654655 (1987-03-01), Kowalski
patent: 5095503 (1992-03-01), Kowalski
patent: 5365573 (1994-11-01), Sakamoto et al.
patent: 5524045 (1996-06-01), Yazawa
patent: 5561712 (1996-10-01), Nishihara
Bost Dwayne D.
Brown Charles D.
Kalousek Pavel
Miller Russel B.
Qualcomm Incorporated
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