DE3484121D1 - Monolithisch integrierte fernsprechschaltungen fuer rufabschaltungserkennung. - Google Patents

Monolithisch integrierte fernsprechschaltungen fuer rufabschaltungserkennung.

Info

Publication number
DE3484121D1
DE3484121D1 DE8484114086T DE3484121T DE3484121D1 DE 3484121 D1 DE3484121 D1 DE 3484121D1 DE 8484114086 T DE8484114086 T DE 8484114086T DE 3484121 T DE3484121 T DE 3484121T DE 3484121 D1 DE3484121 D1 DE 3484121D1
Authority
DE
Germany
Prior art keywords
current
detection
sub
circuit
line
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 - Fee Related
Application number
DE8484114086T
Other languages
English (en)
Inventor
Marco Siligoni
Vanni Dr Saviotti
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.)
STMicroelectronics SRL
Original Assignee
SGS Thomson Microelectronics SRL
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 SGS Thomson Microelectronics SRL filed Critical SGS Thomson Microelectronics SRL
Application granted granted Critical
Publication of DE3484121D1 publication Critical patent/DE3484121D1/de
Anticipated expiration legal-status Critical
Expired - Fee Related 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)
  • Interface Circuits In Exchanges (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Telephonic Communication Services (AREA)
  • Noise Elimination (AREA)
  • Manipulation Of Pulses (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Nitrogen Condensed Heterocyclic Rings (AREA)
  • Telephone Function (AREA)
DE8484114086T 1983-11-23 1984-11-22 Monolithisch integrierte fernsprechschaltungen fuer rufabschaltungserkennung. Expired - Fee Related DE3484121D1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT8323832A IT1212838B (it) 1983-11-23 1983-11-23 Circuito telefonico, integrabile monoliticamente, per il riconoscimento dello sgancio in fase di suoneria.

Publications (1)

Publication Number Publication Date
DE3484121D1 true DE3484121D1 (de) 1991-03-28

Family

ID=11210289

Family Applications (2)

Application Number Title Priority Date Filing Date
DE198484114086T Pending DE143435T1 (de) 1983-11-23 1984-11-22 Monolithisch integrierte fernsprechschaltungen fuer rufabschaltungserkennung.
DE8484114086T Expired - Fee Related DE3484121D1 (de) 1983-11-23 1984-11-22 Monolithisch integrierte fernsprechschaltungen fuer rufabschaltungserkennung.

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DE198484114086T Pending DE143435T1 (de) 1983-11-23 1984-11-22 Monolithisch integrierte fernsprechschaltungen fuer rufabschaltungserkennung.

Country Status (8)

Country Link
US (1) US4677664A (de)
EP (1) EP0143435B1 (de)
JP (1) JPH0710083B2 (de)
AT (1) ATE60967T1 (de)
BR (1) BR8405956A (de)
DE (2) DE143435T1 (de)
ES (1) ES537753A0 (de)
IT (1) IT1212838B (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4784435A (en) * 1986-02-26 1988-11-15 Leib Roger K Patient chair
IT1213306B (it) * 1986-07-29 1989-12-20 Sgs Microelettronica Spa Circuito telefonico, integrabile monoliticamente, per l'invio disegnali di suoneria in una linea telefonica d'utente e per il riconoscimento dello sgangio in fase di suoneria.
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
JPH08139802A (ja) * 1994-11-10 1996-05-31 Fujitsu Ltd リングトリップ判定回路
US5544241A (en) * 1995-06-27 1996-08-06 Andrew S. Dibner Telephone ring detector

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3829619A (en) * 1972-12-29 1974-08-13 Stromberg Carlson Corp Telephone ring trip circuit
CH604453A5 (de) * 1976-06-25 1978-09-15 Ibm
FR2452832A1 (fr) * 1979-03-30 1980-10-24 Telecommunications Sa Dispositif de commande de sonnerie
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
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
IT1155661B (it) * 1982-03-24 1987-01-28 Cselt Centro Studi Lab Telecom Circuito elettronico per la rivelazione dello sgancio del microtelefono in presenza della corrente di chiamata

Also Published As

Publication number Publication date
EP0143435A2 (de) 1985-06-05
JPH0710083B2 (ja) 1995-02-01
ES8600591A1 (es) 1985-10-16
US4677664A (en) 1987-06-30
IT8323832A0 (it) 1983-11-23
BR8405956A (pt) 1985-09-10
DE143435T1 (de) 1987-05-21
EP0143435A3 (en) 1987-06-16
ATE60967T1 (de) 1991-03-15
ES537753A0 (es) 1985-10-16
IT1212838B (it) 1989-11-30
JPS60152161A (ja) 1985-08-10
EP0143435B1 (de) 1991-02-20

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee