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A TOTALLY CORDLESS SPEAKER PHONE

IP.com Disclosure Number: IPCOM000006086D
Original Publication Date: 1991-Apr-01
Included in the Prior Art Database: 2001-Dec-03
Document File: 1 page(s) / 62K

Publishing Venue

Motorola

Related People

Frank Lambrecht: AUTHOR [+2]

Abstract

Many readers are familiar with the use of the speaker-phones or "squawk boxes" utilized for telephone conference calls. These speaker-phones are connected to the telephone system via at least one set of wires with some models also requiring an additional set of wires to supply operating power. Any way one views the situation the mobility of the speaker-phone is limited by the scope of the shortest cable connected to it. With the advent of the new CT-2 technology it is now possible to break that tether. For those not familiar with the term CT-2 and the associated technology a brief explanation follows.

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MOTOROLA INC. Technical Developments Volume 12 April 1991

A TOTALLY CORDLESS SPEAKER PHONE

by Frank Lambrecht and Jerry Giacomino~

  Many readers are familiar with the use of the speaker-phones or "squawk boxes" utilized for telephone conference calls. These speaker-phones are connected to the telephone system via at least one set of wires with some models also requiring an additional set of wires to supply operating power. Any way one views the situation the mobility of the speaker-phone is limited by the scope of the shortest cable connected to it. With the advent of the new CT-2 technology it is now possible to break that tether. For those not familiar with the term CT-2 and the associated technology a brief explanation follows.

  CT-2 stands for "Cordless Telephone - Second Generation" and is quite different from the current cordless telephone technology. The new CT-2 systems are totally digital and operate in a different frequency band from the older cordless telephones. These differences render them immune to casual eavesdropping which is a problem with the current generation of analog cordless telephones. Another benefit of the CT-2 system is the ability to take the handset out of the home environment and use it at various locations around town wherever a public base station is located.. When within range of one of these public base stations one can simply use the handset to place a call and subsequently be billed for the connect time. This type operation...