BR8100796A - Circuito telefonico para geracao de cadencia de compainha e deteccao de fora-do-gancho - Google Patents
Circuito telefonico para geracao de cadencia de compainha e deteccao de fora-do-ganchoInfo
- Publication number
- BR8100796A BR8100796A BR8100796A BR8100796A BR8100796A BR 8100796 A BR8100796 A BR 8100796A BR 8100796 A BR8100796 A BR 8100796A BR 8100796 A BR8100796 A BR 8100796A BR 8100796 A BR8100796 A BR 8100796A
- Authority
- BR
- Brazil
- Prior art keywords
- compainha
- cadence
- generation
- telephone circuit
- hook detection
- Prior art date
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)
- Telephonic Communication Services (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT67252/80A IT1128374B (it) | 1980-02-19 | 1980-02-19 | Circuito telefonico per la generazione del ritmo di suoneria ed il riconoscimento dello sgancio |
Publications (1)
Publication Number | Publication Date |
---|---|
BR8100796A true BR8100796A (pt) | 1981-08-25 |
Family
ID=11300855
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BR8100796A BR8100796A (pt) | 1980-02-19 | 1981-02-09 | Circuito telefonico para geracao de cadencia de compainha e deteccao de fora-do-gancho |
Country Status (8)
Country | Link |
---|---|
US (1) | US4362908A (pt) |
EP (1) | EP0034339B1 (pt) |
JP (1) | JPS56131246A (pt) |
BR (1) | BR8100796A (pt) |
CA (1) | CA1153838A (pt) |
DE (1) | DE3164041D1 (pt) |
DK (1) | DK63281A (pt) |
IT (1) | IT1128374B (pt) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5897949A (ja) * | 1981-12-08 | 1983-06-10 | Fujitsu Ltd | リングトリップ回路 |
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 |
US4455456A (en) * | 1982-04-26 | 1984-06-19 | International Telephone And Telegraph Corporation | Digital supervisory circuit for a telephone system |
US4524245A (en) * | 1983-01-13 | 1985-06-18 | Redcom Laboratories Inc. | Ring trip detection system |
JPS59140572U (ja) * | 1983-03-11 | 1984-09-19 | 株式会社東芝 | リングトリツプ回路 |
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. |
US4590331A (en) * | 1984-03-13 | 1986-05-20 | Security Systems Internationale, Inc. | Hostage negotiation telephone system |
CA1240085A (en) * | 1984-05-30 | 1988-08-02 | Kenji Takato | Calling signal transmission apparatus |
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. |
US5001748A (en) * | 1989-08-21 | 1991-03-19 | Siemens Transmission Systems, Inc. | Ringing signal generator |
WO1993011624A1 (en) * | 1991-12-02 | 1993-06-10 | Harris Corporation | Telephone ringing signal generator |
US5406623A (en) * | 1993-04-23 | 1995-04-11 | At&T Corp. | Method and apparatus for ringing telephone stations |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2014950B2 (de) * | 1970-03-28 | 1976-01-02 | Standard Elektrik Lorenz Ag, 7000 Stuttgart | Verfahren und Schaltungsanordnung zur Rufabschaltung in Fernmelde-, insbesondere Fernsprechanlagen |
US3720793A (en) * | 1971-09-01 | 1973-03-13 | Bell Telephone Labor Inc | Supervisory circuit arrangement for telephone subscriber lines |
DE2239128A1 (de) * | 1972-08-09 | 1974-02-21 | Telefonbau & Normalzeit Gmbh | Schaltungsanordnung zur rufabschaltung in fernmeldeanlagen |
US3978293A (en) * | 1974-11-07 | 1976-08-31 | Bell Telephone Laboratories, Incorporated | Ringing control circuitry with shared ringing loop current detector |
US3941939A (en) * | 1974-11-25 | 1976-03-02 | International Telephone And Telegraph Corporation | Electronic ring trip circuit |
US4087646A (en) * | 1977-01-28 | 1978-05-02 | Bell Telephone Laboratories, Incorporated | Dual mode telephone subscriber loop current detector |
FR2382818A1 (fr) * | 1977-03-04 | 1978-09-29 | Jeumont Schneider | Procede de detection rapide du decrochage de postes telephoniques pendant le passage du courant d'appel et installation pour la mise en oeuvre de ce procede |
NL7703293A (nl) * | 1977-03-28 | 1978-10-02 | Philips Nv | Lusdetector voor het detecteren van het slui- ten van een abonneelus tijdens het wekken door middel van snelle polariteitswisselingen. |
FR2423096A1 (fr) * | 1978-01-17 | 1979-11-09 | Materiel Telephonique | Agencement de sonnerie pour joncteur de central telephonique a unite de commande centralisee |
US4262172A (en) * | 1980-01-17 | 1981-04-14 | Bell Telephone Laboratories, Incorporated | Ring-trip detector |
-
1980
- 1980-02-19 IT IT67252/80A patent/IT1128374B/it active
-
1981
- 1981-02-07 JP JP1632781A patent/JPS56131246A/ja active Pending
- 1981-02-09 BR BR8100796A patent/BR8100796A/pt unknown
- 1981-02-13 DE DE8181100995T patent/DE3164041D1/de not_active Expired
- 1981-02-13 EP EP81100995A patent/EP0034339B1/en not_active Expired
- 1981-02-13 DK DK63281A patent/DK63281A/da not_active Application Discontinuation
- 1981-02-18 US US06/235,534 patent/US4362908A/en not_active Expired - Fee Related
- 1981-02-18 CA CA000371189A patent/CA1153838A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US4362908A (en) | 1982-12-07 |
IT8067252A0 (it) | 1980-02-19 |
DE3164041D1 (en) | 1984-07-19 |
JPS56131246A (en) | 1981-10-14 |
EP0034339B1 (en) | 1984-06-13 |
CA1153838A (en) | 1983-09-13 |
DK63281A (da) | 1981-08-20 |
EP0034339A1 (en) | 1981-08-26 |
IT1128374B (it) | 1986-05-28 |
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