IT1048758B - Circuito di controllo di chiamata con rivelatore di corrente d anello di chiamata suddiviso - Google Patents

Circuito di controllo di chiamata con rivelatore di corrente d anello di chiamata suddiviso

Info

Publication number
IT1048758B
IT1048758B IT2897675A IT2897675A IT1048758B IT 1048758 B IT1048758 B IT 1048758B IT 2897675 A IT2897675 A IT 2897675A IT 2897675 A IT2897675 A IT 2897675A IT 1048758 B IT1048758 B IT 1048758B
Authority
IT
Italy
Prior art keywords
control circuit
call control
current detector
ring current
detected ring
Prior art date
Application number
IT2897675A
Other languages
English (en)
Original Assignee
Western Electric Co
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 US05/521,734 external-priority patent/US3978293A/en
Priority claimed from US05/521,651 external-priority patent/US3978292A/en
Application filed by Western Electric Co filed Critical Western Electric Co
Application granted granted Critical
Publication of IT1048758B publication Critical patent/IT1048758B/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)
  • Interface Circuits In Exchanges (AREA)
  • Exchange Systems With Centralized Control (AREA)
  • Plural Heterocyclic Compounds (AREA)
IT2897675A 1974-11-07 1975-11-03 Circuito di controllo di chiamata con rivelatore di corrente d anello di chiamata suddiviso IT1048758B (it)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US05/521,734 US3978293A (en) 1974-11-07 1974-11-07 Ringing control circuitry with shared ringing loop current detector
US05/521,651 US3978292A (en) 1974-11-07 1974-11-07 Ringing control circuitry with shared ringing loop current detector

Publications (1)

Publication Number Publication Date
IT1048758B true IT1048758B (it) 1980-12-20

Family

ID=27060535

Family Applications (1)

Application Number Title Priority Date Filing Date
IT2897675A IT1048758B (it) 1974-11-07 1975-11-03 Circuito di controllo di chiamata con rivelatore di corrente d anello di chiamata suddiviso

Country Status (9)

Country Link
JP (1) JPS5169906A (it)
BR (1) BR7507193A (it)
DE (1) DE2549469C2 (it)
ES (1) ES442422A1 (it)
FR (1) FR2290805A1 (it)
GB (1) GB1515720A (it)
IT (1) IT1048758B (it)
NL (1) NL7513016A (it)
SE (1) SE7512060L (it)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2755639C2 (de) * 1977-12-14 1985-06-05 Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt Schaltungsanordnung zur logischen Verarbeitung von Teilnehmer-Kriterien in Fernmelde-, insbesondere Fernsprechvermittlungsanlagen
FR2451682A1 (fr) * 1979-03-12 1980-10-10 Jeumont Schneider Dispositif d'appel pour installation telephonique automatique d'abonne avec postes supplementaires
JPS56119565A (en) * 1981-02-12 1981-09-19 Hitachi Ltd Signal processing device in subscriber's circuit

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3720793A (en) * 1971-09-01 1973-03-13 Bell Telephone Labor Inc Supervisory circuit arrangement for telephone subscriber lines
FR2171594A5 (it) * 1972-02-08 1973-09-21 Constr Telephoniques
FR2172537A5 (it) * 1972-02-17 1973-09-28 Constr Telephoniques

Also Published As

Publication number Publication date
BR7507193A (pt) 1976-08-10
SE7512060L (sv) 1976-05-10
JPS571171B2 (it) 1982-01-09
FR2290805A1 (fr) 1976-06-04
GB1515720A (en) 1978-06-28
FR2290805B1 (it) 1981-02-06
ES442422A1 (es) 1977-08-16
DE2549469C2 (de) 1984-05-17
JPS5169906A (ja) 1976-06-17
DE2549469A1 (de) 1976-05-13
NL7513016A (nl) 1976-05-11

Similar Documents

Publication Publication Date Title
NL7407953A (nl) Spanningstroomomzetter.
BR7605541A (pt) Circuito detector de limiar
IT1042222B (it) Anello di tenuta
IT1082669B (it) Anello di tenuta autobloccante
IT1024582B (it) Sonda rivelatrice di corrente vorticosa
NL7508151A (nl) Detector.
IT981087B (it) Circuito convertitore digitale analogico
SE407861B (sv) Scintillationskamera
BR7402420D0 (pt) Circuito detetor
CA1033482A (en) Ringing control circuitry with shared ringing loop current detector
IT1002423B (it) Circuito comparatore
SE7508643L (sv) Strombegrensningsanordning
CA1033483A (en) Ringing control circuitry with shared ringing loop current detector
IT1048758B (it) Circuito di controllo di chiamata con rivelatore di corrente d anello di chiamata suddiviso
NL7504431A (nl) Stralinggevoelige schakelaar.
NL7505423A (nl) Detectieschakeling.
IT1014175B (it) Circuito telefonico interurbano
IT1033377B (it) Rivelatore di soglia
IT1032765B (it) Interruttore limitatore di corrente
BR7502972A (pt) Detector de falhas e limitador de corrente
IT1032923B (it) Limitatore di corrente di corto circuito
IT989272B (it) Circuito d interruzione della corrente di chiamata
IT1052708B (it) Anello di tenuta strisciante
SE439209B (sv) Branddetektor
NL174398C (nl) Scintillatie-camera.