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WO1992015167A1 - Adapteur telephonique destine a des postes telephoniques - Google Patents

Adapteur telephonique destine a des postes telephoniques Download PDF

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Publication number
WO1992015167A1
WO1992015167A1 PCT/US1992/000488 US9200488W WO9215167A1 WO 1992015167 A1 WO1992015167 A1 WO 1992015167A1 US 9200488 W US9200488 W US 9200488W WO 9215167 A1 WO9215167 A1 WO 9215167A1
Authority
WO
WIPO (PCT)
Prior art keywords
telephone
line
hook
switching device
unit according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US1992/000488
Other languages
English (en)
Inventor
Gil Druckman
Amnon Abiri
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from IL9725091A external-priority patent/IL97250A/en
Application filed by Individual filed Critical Individual
Priority to EP92906268A priority Critical patent/EP0659319A1/fr
Publication of WO1992015167A1 publication Critical patent/WO1992015167A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/68—Circuit arrangements for preventing eavesdropping
    • H04M1/70—Lock-out or secrecy arrangements in party-line systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/71—Substation extension arrangements
    • H04M1/715—Substation extension arrangements using two or more extensions per line
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/02—Arrangements for interconnection not involving centralised switching involving a common line for all parties

Definitions

  • the present invention relates to telephony, and particularly to a telephone adaptor (or jack) unit for connecting telephone handsets to a telephone line.
  • a subscriber's telephone line usually includes a number of extensions enabling different handsets to transmit and receive via the same telephone line.
  • Many sophisticated systems are available providing, among a wide variety of various telephone functions, the function of connecting a selected extension to the telephone line, or connecting a plurality of extensions at one time to the telephone line to provide intercommunication between the extensions.
  • such known sophisticated systems are generally very complicated and costly, and are therefore generally utilized only by commercial concerns, as distinguished from residential subscribers which may have but a few extensions connected to one telephone line and which do not require many of the functions of a sophisticated system.
  • An object of the present invention is to provide a telephone adaptor unit particularly useful by residential subscribers to permit the telephone line to be used for many of the serves now provided by sophisticated, costly telephone systems used by commerical concerns.
  • a telephone adaptor unit for a telephone handset connectible, with other like telephone adaptor units for other telephone handsets, between the respective telephone handset and a common telephone line comprising: an off-hook detector for detecting whether the respective telephone handset is off-hook, on-hook, or momentarily on-hook; a first switching device effective, when the respective off-hook detector detects an off-hook condition, to connect the respective telephone handset to the telephone line and to disconnect the other telephone handsets from the telephone line; an audio circuit including an audio amplifier and speaker connected to the telephone line; a second switching device for enabling the audio circuit to receive audio signals from the telephone line and to reproduce such signals via its speaker; and a control system effective, when actuated, to actuate the first switching device of the other telephone adaptor units to connect their respective telephone handsets to the common telephone line, and to actuate the second switching device of the other telephone adaptor units to enable the audio circuit of the other telephone adaptor units to receive audio signals from the telephone line and to reproduce such signals via their speakers.
  • control system also includes time delay means effective, upon actuation of the control system, to actuate the first switching devices of the other telephone adaptor units only for a first predetermined time interval, and to actuate the second switching devices of the other telephone adaptor units for a second predetermined time interval.
  • control system includes a signal detector connected to the output of the line status detector, a first time delay circuit connected between the signal detector and the first switching device, and a second time delay circuit connected between the signal detector and the second switching device.
  • the first predetermined time interval may be of the order of 20 seconds
  • the second predetermined Jime interval may be of the order of 10 seconds.
  • a telephone adaptor unit constructed in accordance with the foregoing features provides a number of important advantages. Thus, it enables private conversations to be had via one telephone - A -
  • the telephone adaptor unit serves as a paging system, enabling a person at one telephone handset to use the built-in speaker in the adaptor unit for paging purposes.
  • the telephone adaptor unit further permits the telephone line also to serve as a home intercommunication system wherein all the telephone handsets are simultaneously connected to the telephone line.
  • the adaptor unit thus includes its own built-in speaker which may be used for paging purposes, for example, such a unit might be called a "talking jack".
  • Fig. 1 is a block diagram illustrating a telephone line equipped with a plurality of telephone adaptor units constructed in accordance with the present invention
  • Fig. 2 is a block diagram illustrating one construction of one of the telephone adaptor units in the system of Fig. 1 ;
  • Fig. 3 is a block diagram illustrating a modification in the construction of the telephone adaptor unit of Fig. 2.
  • a telephone line including two wires 2a, 2b, such as may be provided a subscriber in the subscriber's home.
  • the subscriber is further provided with a plurality of telephone handsets 4a, 4b, 4c each connected or connectible to the telephone line to permit any one of the telephone handsets to use the telephone line for both transmitting and receiving messsges.
  • the connections of the telephone handsets 4a-4c to the telephone line 2a, 2b are done by wall-mounted jacks which permit each telephone handset to be selectively connected to the telephone line.
  • such telephone jacks are used for receiving a telephone adaptor unit, shown at 6a, 6b and 6c in Fig. 1, for connecting the telephone handsets 4a-4c to the telephone line 2a, 2b in such a manner to enable the telephone line to be used for other functions, including paging and intercommunication, as will be described below.
  • Fig. 2 illustrates one construction, generally designated 6, of one of the telephone adaptor units 6a-6c.
  • the telephone adaptor unit 6 is connected to the telephone line (2a, 2b, Fig. 1) via a wall jack 8 and to the respective telephone handset (4a-4c, Fig. 1) via a telephone connection 10.
  • the telephone adaptor unit 6 illustrated in Fig. 2 includes an off-hook detector 12 for detecting whether the respective telephone handset is off-hook, on-hook or momentarily on-hook ("flashing hook") .
  • the off-hook detector 12 also controls a switching device 14 which, when the detector detects an off-hook condition in its respective handset, connects its respective handset to the telephone line and disconnects the other telephone handsets from the telephone line.
  • the telephone line carries a +48 volt when all the telephone handsets are in an on-hook condition.
  • the detector actuates its switching device 14 to connect its handset to the telephone line. This causes the voltage on the telephone line to drop such that the switching devices 14 in the adaptor units for the other telephone handsets are disabled from connecting their respective handsets to the telephone line.
  • the switching devices 14 in the adaptor units for the other telephone handsets are disabled from connecting their respective handsets to the telephone line.
  • the telephone adaptor unit 6 illustrated in Fig. 2 further includes an audio circuit connected to the telephone line including an audio amplifier 16 and a speaker 18 driven by the amplifier.
  • the audio amplifier 16 is energized by a self-contained power supply 20, such as a rechargeable battery, via a power supply switch 22. Normally, switch 22 is open, thereby disabling the audio circuit.
  • Each telephone adaptor unit 6 as illustrated in Fig. 2 further includes a line status detector 24.
  • Detector 24 continuously detects the status of the telephone line, i.e., to detemine whether all the telephone handsets connected to the line are "on-hook", or whether one is "off-hook". In the illustrated example, this can be determined by sensing the voltage on the telephone line, it being +48 V in the all "on-hook” condition, and at a lower value when one of the handsets goes “off-hook”.
  • Detector 24 particularly detects a momentarily off-hook condition, or a "flashing hook", e.g., by the user momentarily or repeatedly operating the off-hook lever of the telephone handset.
  • Timer 28 is actuated to close the switching device 14 in the respective adaptor unit for a predetermined time interval, and thereby to connect all the telephone handsets to the telephone line for this predetermined time interval.
  • Timer 30 is effective to close the power supply switch 22 connecting the power supply 20 to the audio amplifier 16, and thereby to enable the audio amplifier to drive the speaker 18 from the telephone line for another predetermined time interval.
  • the telephone adaptor unit illustrated in Fig. 2 operates as follows:
  • Detector 12 actuates its switching device 14 to connect the respective telephone handset to the telephone line.
  • the +48 V across the line now drops, so that the switching devices 14 in the other telephone adaptor units are disabled from connecting their respective telephone handsets to the line.
  • the telephone adaptor unit 6 enables the first telephone handset which goes off-hook to seize the line and to engage in private conversations which cannot be heard on the other telephone handsets.
  • timer 28 actuates the switching device 14 in its respective adaptor unit to connect its respective telephone handset to the telephone line for a predetermined time interval; and timer 30 closes the power supply switch 22, also for a predetermined time interval, thereby enabling the audio amplifier 16, receiving audio signals from the telephone line, to drive the speaker 18.
  • the user of one telephone handset may talk into the handset in order to page a person, and the spoken words will be transmitted via the telephone line to all the other handsets connected to that telephone line.
  • timer 30 may have an interval in the order of 10 seconds, thereby permitting a person to be paged for 10 seconds after the "flashing signal".
  • the "flashing signal" is produced at one telephone handset, all the telephone handsets are connected to the telephone line for a period of time determined by timer 28, enabling any of the other telephone handsets to go off-hook and thereby to be simultaneously connected to the line so as to provide intercommunication between the headsets.
  • the period of time by timer 28 is in the order of 20 seconds.
  • Fig. 3 illustrates a variation in the construction of the telephone adaptor unit shown in Fig. 2.
  • the essential difference in the variation of Fig. 3 is that a microprocessor 40 is provided to perform the functions of the signalling detector 26, timer 28 and timer 30.
  • the telephone adaptor unit illustrated in Fig. 3 is constructed, and operates in the same manner, as described above with respect to Fig. 2, and therefore the same reference numerals have been used to identify the corresponding elements as appearing in Fig. 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephone Function (AREA)

Abstract

Unité d'adapteur téléphonique (6) pour un poste téléphonique pouvant être connectée, avec d'autres unités semblables d'adapteurs téléphoniques pour d'autres postes téléphoniques, entre le poste téléphonique respectif et une ligne téléphonique commune (2). Ladite unité d'adaptateur téléphonique (6) comprend un premier système de commutation (14) qui peut efficacement, lorsqu'une condition de décrochage est détectée, connecter le poste téléphonique respectif à la ligne téléphonique, et déconnecter de la ligne les autres postes téléphoniques, un circuit basse fréquence comprenant un haut-parleur (18), un deuxième système de commutation (22) permettant au circuit basse fréquence de recevoir des signaux audio provenant de la ligne et de reproduire ces signaux par l'intermédiaire de son haut-parleur, et un système de commande servant à mettre en ÷uvre le premier système de commutation des autres unités pour connecter leurs postes téléphoniques respectifs à la ligne, et le deuxième système de commutation des autres unités pour permettre au circuit basse fréquence des autres unités de recevoir des signaux audio provenant de la ligne et de reproduire ces signaux par l'intermédiaire de leurs haut-parleurs.
PCT/US1992/000488 1991-02-15 1992-01-21 Adapteur telephonique destine a des postes telephoniques Ceased WO1992015167A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP92906268A EP0659319A1 (fr) 1991-02-15 1992-01-21 Adapteur telephonique destine a des postes telephoniques

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
IL9725091A IL97250A (en) 1991-02-15 1991-02-15 Telephone adaptor for telephone handsets
IL97250 1991-02-15
US721,079 1991-06-26
US07/721,079 US5283825A (en) 1991-02-15 1991-06-26 Telephone adaptor for telephone sets

Publications (1)

Publication Number Publication Date
WO1992015167A1 true WO1992015167A1 (fr) 1992-09-03

Family

ID=26322224

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1992/000488 Ceased WO1992015167A1 (fr) 1991-02-15 1992-01-21 Adapteur telephonique destine a des postes telephoniques

Country Status (3)

Country Link
EP (1) EP0659319A1 (fr)
AU (1) AU1344292A (fr)
WO (1) WO1992015167A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4000376A (en) * 1975-03-31 1976-12-28 Viking Electronics, Inc. Telephone privacy device
US4631365A (en) * 1984-09-24 1986-12-23 Clinton Potter Intercom system
US4821319A (en) * 1985-04-25 1989-04-11 Alcatel Usa Corp. Single line telephone communication system

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1166777A (fr) * 1981-03-23 1984-05-01 Gordon D. Benning Central telephonique domestique
US4408102A (en) * 1981-04-27 1983-10-04 Lumpkin Steven B Two-wire exchange telephone system
US4754476A (en) * 1985-03-19 1988-06-28 Rasmussen Harry R Premises page/intercom system utilizing telephone set component
JPH0697773B2 (ja) * 1987-04-03 1994-11-30 株式会社東芝 電話機
US4893334A (en) * 1987-08-28 1990-01-09 Power Play Intercommunication system for telephones
US4899378A (en) * 1988-01-27 1990-02-06 Hamer William C Telephone announcement system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4000376A (en) * 1975-03-31 1976-12-28 Viking Electronics, Inc. Telephone privacy device
US4631365A (en) * 1984-09-24 1986-12-23 Clinton Potter Intercom system
US4821319A (en) * 1985-04-25 1989-04-11 Alcatel Usa Corp. Single line telephone communication system

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
"511E Intercom System", by ITT, 6 pages, June 1986, see entire document. *
"Homefone", by Technicom International, 25 March 1983, see entire document. *
Popular Mechanics, "Technology Update", page 122, December 1982. *
See also references of EP0659319A4 *

Also Published As

Publication number Publication date
AU1344292A (en) 1992-09-15
EP0659319A1 (fr) 1995-06-28
EP0659319A4 (fr) 1994-12-19

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