Apparatus for cord-free hands-free telephony

Details Apparatus for cord-free hands-free telephony Apparatus for cord-free hands-free telephony

2007-03-06

2007-03-06

Tran, Sinh (Department: 2615)

Telephonic communications

Terminal

Housing or housing component

C455S575200

Reexamination Certificate

active

10793245

ABSTRACT:
A telephone line interface includes a ring detect circuit for activating a RF transceiver and thereby notifying the RF headset of a ringing condition on a telephone line. A wire conversion circuit separates transmit voice signals from receive voice signals and provides the separated voice signals to the RF transceiver. A firmware allows the electronic hook switch to go off hook only when the line is ringing or only when the line is off hook.

REFERENCES:
patent: 5426689 (1995-06-01), Griffith et al.
patent: 6078825 (2000-06-01), Hahn et al.
patent: 2004/0266349 (2004-12-01), Wang
“Hello Direct: Cordless XLT User Guide,” Hello Direct, Inc. San Jose CA. 1998.
“Olympia: Bluetooth Two Line.” User Guide. Olympia Phones.
“Plantronics, Cordless Headset Telephone” Product Information Booklet. Plantronics, Inc. Santa Cruz, CA. 2003.

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