IT8267371A0 - Circuito elettronico per la rivelazione dello sgancio del microtelefono in presenza della corrente di chiamata - Google Patents

Circuito elettronico per la rivelazione dello sgancio del microtelefono in presenza della corrente di chiamata

Info

Publication number
IT8267371A0
IT8267371A0 IT8267371A IT6737182A IT8267371A0 IT 8267371 A0 IT8267371 A0 IT 8267371A0 IT 8267371 A IT8267371 A IT 8267371A IT 6737182 A IT6737182 A IT 6737182A IT 8267371 A0 IT8267371 A0 IT 8267371A0
Authority
IT
Italy
Prior art keywords
handset
hook
detecting
electronic circuit
calling current
Prior art date
Application number
IT8267371A
Other languages
English (en)
Other versions
IT1155661B (it
Inventor
Flavio Melindo
Mario Sartori
Original Assignee
Cselt Centro Studi Lab Telecom
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
Application filed by Cselt Centro Studi Lab Telecom filed Critical Cselt Centro Studi Lab Telecom
Publication of IT8267371A0 publication Critical patent/IT8267371A0/it
Priority to IT67371/82A priority Critical patent/IT1155661B/it
Priority to DK116083A priority patent/DK116083A/da
Priority to CA000423493A priority patent/CA1194627A/en
Priority to ES520573A priority patent/ES8403001A1/es
Priority to JP58042515A priority patent/JPS58207758A/ja
Priority to BR8301380A priority patent/BR8301380A/pt
Priority to DE198383102858T priority patent/DE89687T1/de
Priority to DE8383102858T priority patent/DE3367993D1/de
Priority to EP83102858A priority patent/EP0089687B1/en
Priority to US06/478,470 priority patent/US4528425A/en
Application granted granted Critical
Publication of IT1155661B publication Critical patent/IT1155661B/it

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
    • H04M19/026—Arrangements for interrupting the ringing current

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Telephonic Communication Services (AREA)
  • Telephone Function (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Interface Circuits In Exchanges (AREA)
IT67371/82A 1982-03-24 1982-03-24 Circuito elettronico per la rivelazione dello sgancio del microtelefono in presenza della corrente di chiamata IT1155661B (it)

Priority Applications (10)

Application Number Priority Date Filing Date Title
IT67371/82A IT1155661B (it) 1982-03-24 1982-03-24 Circuito elettronico per la rivelazione dello sgancio del microtelefono in presenza della corrente di chiamata
DK116083A DK116083A (da) 1982-03-24 1983-03-10 Elektronisk kredsloeb til detektion af afloeftningen af en mikrotelefon ved tilstedevaerelsen af en ringestroem
CA000423493A CA1194627A (en) 1982-03-24 1983-03-14 Electronic circuit for detecting the lifting of a telephone handset in presence of ringing current
ES520573A ES8403001A1 (es) 1982-03-24 1983-03-14 Procedimiento y circuito electronico para detectar el estado de microtelefono descolgado en presencia de corriente de llamada en linea.
JP58042515A JPS58207758A (ja) 1982-03-24 1983-03-16 受話器取上げ検出回路
BR8301380A BR8301380A (pt) 1982-03-24 1983-03-18 Processo e circuito eletronico para detectar levantamento de conjugado telefonico de mao
DE198383102858T DE89687T1 (de) 1982-03-24 1983-03-22 Verfahren und elektronische vorrichtung zum erkennen des abhebens des telefonhoerers bei vorhandensein von rufstrom.
DE8383102858T DE3367993D1 (en) 1982-03-24 1983-03-22 Method of and electronic device for detecting the lifting of the telephone handset in presence of ringing current
EP83102858A EP0089687B1 (en) 1982-03-24 1983-03-22 Method of and electronic device for detecting the lifting of the telephone handset in presence of ringing current
US06/478,470 US4528425A (en) 1982-03-24 1983-03-24 Method of and circuitry for detecting, at a telephone exchange, the lifting of a subscriber's handset in response to ringing current emitted by the exchange

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT67371/82A IT1155661B (it) 1982-03-24 1982-03-24 Circuito elettronico per la rivelazione dello sgancio del microtelefono in presenza della corrente di chiamata

Publications (2)

Publication Number Publication Date
IT8267371A0 true IT8267371A0 (it) 1982-03-24
IT1155661B IT1155661B (it) 1987-01-28

Family

ID=11301842

Family Applications (1)

Application Number Title Priority Date Filing Date
IT67371/82A IT1155661B (it) 1982-03-24 1982-03-24 Circuito elettronico per la rivelazione dello sgancio del microtelefono in presenza della corrente di chiamata

Country Status (9)

Country Link
US (1) US4528425A (it)
EP (1) EP0089687B1 (it)
JP (1) JPS58207758A (it)
BR (1) BR8301380A (it)
CA (1) CA1194627A (it)
DE (2) DE3367993D1 (it)
DK (1) DK116083A (it)
ES (1) ES8403001A1 (it)
IT (1) IT1155661B (it)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2553893B1 (fr) * 1983-10-19 1986-02-07 Texas Instruments France Procede et dispositif de detection d'une transition de la composante continue d'un signal periodique, notamment pour joncteur telephonique
IT1212838B (it) * 1983-11-23 1989-11-30 Ates Componenti Elettron Circuito telefonico, integrabile monoliticamente, per il riconoscimento dello sgancio in fase di suoneria.
FR2575021B1 (fr) * 1984-12-18 1990-06-01 Thomson Csf Circuit d'interface d'abonne telephonique incorporant des moyens de detection de decrochage du combine en phase d'appel et procede de detection correspondant
JPS633547A (ja) * 1986-06-23 1988-01-08 Nec Corp リングトリツプ検出回路
US7082106B2 (en) 1993-01-08 2006-07-25 Multi-Tech Systems, Inc. Computer-based multi-media communications system and method
SE9400186D0 (sv) * 1994-01-21 1994-01-21 Ericsson Telefon Ab L M Förfarande i ett telekommunikationssystem
DE59510969D1 (de) * 1994-03-04 2004-12-30 Infineon Technologies Ag Verfahren zur störsicheren Abhebeerkennung bei Rufsignaleinspeisung in digitalen Fernsprechvermittlungseinrichtungen und Schaltungsanordnung zur Durchführung des Verfahrens
US5757801A (en) 1994-04-19 1998-05-26 Multi-Tech Systems, Inc. Advanced priority statistical multiplexer
US5682386A (en) 1994-04-19 1997-10-28 Multi-Tech Systems, Inc. Data/voice/fax compression multiplexer
US5905794A (en) * 1996-10-15 1999-05-18 Multi-Tech Systems, Inc. Caller identification interface using line reversal detection
US6351533B1 (en) 1998-01-26 2002-02-26 Xircom, Inc. System and method for protecting devices connected to a telephone line
KR100666986B1 (ko) * 2004-11-12 2007-01-10 삼성전자주식회사 비접촉식 정전센서를 이용한 전화기

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH604453A5 (it) * 1976-06-25 1978-09-15 Ibm
JPS5368010A (en) * 1976-11-29 1978-06-17 Nec Corp Ring trip circuit
US4132864A (en) * 1977-04-28 1979-01-02 International Business Machines Corporation Digital measurement of the DC value in an AC signal adapted to telephone off-hook detection
FR2470498A1 (fr) * 1979-11-21 1981-05-29 Trt Telecom Radio Electr Dispositif de detection du bouclage d'une ligne d'abonne pendant la sonnerie
JPS5680952A (en) * 1979-12-05 1981-07-02 Nec Corp Subscriber monitoring circuit
IT1128374B (it) * 1980-02-19 1986-05-28 Cselt Centro Studi Lab Telecom Circuito telefonico per la generazione del ritmo di suoneria ed il riconoscimento dello sgancio
US4396805A (en) * 1981-09-21 1983-08-02 Siemens Corporation Ring trip detector for a subscriber line interface circuit

Also Published As

Publication number Publication date
CA1194627A (en) 1985-10-01
BR8301380A (pt) 1983-11-29
DK116083D0 (da) 1983-03-10
US4528425A (en) 1985-07-09
EP0089687A2 (en) 1983-09-28
JPS58207758A (ja) 1983-12-03
ES520573A0 (es) 1984-03-01
EP0089687B1 (en) 1986-11-26
IT1155661B (it) 1987-01-28
DE89687T1 (de) 1985-05-09
DK116083A (da) 1983-09-25
ES8403001A1 (es) 1984-03-01
EP0089687A3 (en) 1984-12-19
DE3367993D1 (en) 1987-01-15

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Legal Events

Date Code Title Description
TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19950329