Telephonic communications – Having light wave or ultrasonic link for speech or paging... – Including fiber optic link within telephone network
Patent
1991-01-09
1993-03-02
Kuntz, Curtis
Telephonic communications
Having light wave or ultrasonic link for speech or paging...
Including fiber optic link within telephone network
379 63, 379419, 379428, 379430, H04M 1100, H04M 100
Patent
active
051916029
ABSTRACT:
A telephone headset apparatus for use with an existing cellular telephone. The headset apparatus is modularly connectable to the existing cellular telephone system, and no electrical or mechanical modification of the existing telephone system is required. A "handset primacy" feature of the headset apparatus ensures that normal handset operation of the cellular telephone system is unaffected by the installation of the headset apparatus. In addition, the handset may remain resting in its cradle even while the headset is operated. A slave unit connects with the cellular telephone's transceiver unit, and a headset control unit connects both the headset and handset to the slave unit. The headset control unit contains a pushbutton for selecting headset operation, as well as a volume control dial for controlling the volume of sound reproduced by the headset's earpiece. The slave unit contains circuitry for controlling whether the handset, the headset, or both, are to be coupled to the telephone transmitting and receiving voice signal lines. The slave unit further contains circuitry for disabling the speaker-phone, if any, in the existing cellular telephone system when the headset is operational. A mounting tray inserts between the cellular telephone's cradle and mounting pedestal, keeping the headset control unit in an accessible location. Clips on the underside of the mounting tray allow excess lengths of headset cable to be safely and neatly stored. A retaining ring on the mounting tray provides a convenient resting area for the headset when it is not is use.
REFERENCES:
patent: 4558178 (1985-12-01), Yasuda et al.
patent: 4591661 (1986-05-01), Benedetto et al.
patent: 4930156 (1990-05-01), Norris
patent: 4972457 (1990-11-01), O'Sullivan
patent: 4991197 (1991-02-01), Morris
Telephony, "Portable Phone", p. 76, Mar. 16, 1987.
Teleconnect, "Head Sets", p. 88, Jul. 1987.
Plantronics, "The Mobil Star Cellular Headset", Nov. 1990, #45-01-00.
Teleconnect, "Cellular Headset", p. 119, Mar. 1991.
Regen Paul L.
Tseu Marv
Cumming William
Kuntz Curtis
Plantronics Inc.
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