ES406574A1 - Disposicion perfeccionada de llamada para detectar lares- puesta durante la llamada en sistemas de conmutacion para comunicaciones. - Google Patents

Disposicion perfeccionada de llamada para detectar lares- puesta durante la llamada en sistemas de conmutacion para comunicaciones.

Info

Publication number
ES406574A1
ES406574A1 ES406574A ES406574A ES406574A1 ES 406574 A1 ES406574 A1 ES 406574A1 ES 406574 A ES406574 A ES 406574A ES 406574 A ES406574 A ES 406574A ES 406574 A1 ES406574 A1 ES 406574A1
Authority
ES
Spain
Prior art keywords
call
during
circuit
line circuit
state
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.)
Expired
Application number
ES406574A
Other languages
English (en)
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.)
AT&T Corp
Original Assignee
Western Electric Co Inc
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 Western Electric Co Inc filed Critical Western Electric Co Inc
Publication of ES406574A1 publication Critical patent/ES406574A1/es
Expired legal-status Critical Current

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)
  • Interface Circuits In Exchanges (AREA)
ES406574A 1971-09-01 1972-08-31 Disposicion perfeccionada de llamada para detectar lares- puesta durante la llamada en sistemas de conmutacion para comunicaciones. Expired ES406574A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US17682871A 1971-09-01 1971-09-01

Publications (1)

Publication Number Publication Date
ES406574A1 true ES406574A1 (es) 1975-10-01

Family

ID=22646015

Family Applications (1)

Application Number Title Priority Date Filing Date
ES406574A Expired ES406574A1 (es) 1971-09-01 1972-08-31 Disposicion perfeccionada de llamada para detectar lares- puesta durante la llamada en sistemas de conmutacion para comunicaciones.

Country Status (10)

Country Link
US (1) US3720793A (es)
JP (1) JPS4834405A (es)
BE (1) BE788119A (es)
CA (1) CA944878A (es)
DE (1) DE2242547A1 (es)
ES (1) ES406574A1 (es)
FR (1) FR2152020A5 (es)
GB (1) GB1398170A (es)
IT (1) IT965154B (es)
NL (1) NL7211698A (es)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE7512060L (sv) * 1974-11-07 1976-05-10 Western Electric Co Anordning for att i en telekommunikationsanleggning patrycka och detektera ringsignaler over en anropad linje
US4071709A (en) * 1976-12-16 1978-01-31 Gte Automatic Electric Laboratories Incorporated Line conditioning and transfer circuit
CA1114536A (en) * 1978-12-11 1981-12-15 William B. Kiss Ringing generator
US4234762A (en) * 1978-12-29 1980-11-18 Bell Telephone Laboratories, Incorporated Ring trip detector circuit
FR2451682A1 (fr) * 1979-03-12 1980-10-10 Jeumont Schneider Dispositif d'appel pour installation telephonique automatique d'abonne avec postes supplementaires
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
FR2501442B1 (fr) * 1980-12-29 1987-07-17 Thomson Csf Procede et dispositif de detection du decrochage d'un combine telephonique
DE3814661A1 (de) * 1988-04-29 1989-11-09 Nixdorf Computer Ag Einrichtung zum schalten der rufwechselspannung an teilnehmeranschlussleitungen

Also Published As

Publication number Publication date
US3720793A (en) 1973-03-13
DE2242547A1 (de) 1973-04-26
IT965154B (it) 1974-01-31
GB1398170A (en) 1975-06-18
BE788119A (fr) 1972-12-18
FR2152020A5 (es) 1973-04-20
JPS4834405A (es) 1973-05-18
NL7211698A (es) 1973-03-05
CA944878A (en) 1974-04-02

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