PT76580B - Digital supervisory circuit for a telephone system - Google Patents
Digital supervisory circuit for a telephone systemInfo
- Publication number
- PT76580B PT76580B PT76580A PT7658083A PT76580B PT 76580 B PT76580 B PT 76580B PT 76580 A PT76580 A PT 76580A PT 7658083 A PT7658083 A PT 7658083A PT 76580 B PT76580 B PT 76580B
- Authority
- PT
- Portugal
- Prior art keywords
- counter
- logic circuit
- exceeded
- threshold
- supervisory
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/22—Arrangements for supervision, monitoring or testing
-
- 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
- Signal Processing (AREA)
- Engineering & Computer Science (AREA)
- Selective Calling Equipment (AREA)
- Devices For Supply Of Signal Current (AREA)
- Interface Circuits In Exchanges (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
- Telephonic Communication Services (AREA)
- Monitoring And Testing Of Exchanges (AREA)
- Alarm Systems (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
- Mobile Radio Communication Systems (AREA)
- Maintenance And Management Of Digital Transmission (AREA)
- Manipulation Of Pulses (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/371,846 US4455456A (en) | 1982-04-26 | 1982-04-26 | Digital supervisory circuit for a telephone system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| PT76580A PT76580A (en) | 1983-05-01 |
| PT76580B true PT76580B (en) | 1985-12-16 |
Family
ID=23465641
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PT76580A PT76580B (en) | 1982-04-26 | 1983-04-21 | Digital supervisory circuit for a telephone system |
Country Status (29)
| Country | Link |
|---|---|
| US (1) | US4455456A (pt) |
| EP (1) | EP0092807B1 (pt) |
| JP (1) | JPS58195353A (pt) |
| KR (1) | KR880001651B1 (pt) |
| AT (1) | ATE32409T1 (pt) |
| AU (1) | AU557025B2 (pt) |
| BE (1) | BE896561A (pt) |
| BR (1) | BR8302051A (pt) |
| CA (1) | CA1190678A (pt) |
| DD (1) | DD220479A5 (pt) |
| DE (1) | DE3375632D1 (pt) |
| DK (1) | DK181383A (pt) |
| EG (1) | EG15506A (pt) |
| ES (1) | ES8404128A1 (pt) |
| FI (1) | FI831404L (pt) |
| GR (1) | GR78194B (pt) |
| HU (1) | HU186273B (pt) |
| IN (1) | IN157100B (pt) |
| MA (1) | MA19780A1 (pt) |
| MX (1) | MX153055A (pt) |
| NO (1) | NO831424L (pt) |
| NZ (1) | NZ203885A (pt) |
| PH (1) | PH21028A (pt) |
| PL (1) | PL241632A1 (pt) |
| PT (1) | PT76580B (pt) |
| SU (1) | SU1416065A3 (pt) |
| TR (1) | TR21788A (pt) |
| YU (1) | YU91583A (pt) |
| ZA (1) | ZA832522B (pt) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU579749B2 (en) * | 1982-03-24 | 1988-12-08 | Alcatel Australia Limited | A ring signal detector |
| DE3545574A1 (de) * | 1985-12-21 | 1987-07-02 | Philips Patentverwaltung | Verfahren und schaltungsanordnung zur auswertung der ausgangssignale von stromflussdetektoren in fernmeldeanlagen |
| US4887071A (en) * | 1988-08-18 | 1989-12-12 | Siemens Transmission Systems, Inc. | Digital activity loss detector |
| US5402482A (en) * | 1991-07-08 | 1995-03-28 | Fujitsu Limited | Ring trip deciding circuit |
| JPH05130650A (ja) * | 1991-11-07 | 1993-05-25 | Fujitsu Ltd | 有線回線におけるオンフツクトランスミツシヨン回路 |
| JP2639304B2 (ja) * | 1993-06-15 | 1997-08-13 | 日本電気株式会社 | 加入者回路 |
| 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 |
| JPH08139802A (ja) * | 1994-11-10 | 1996-05-31 | Fujitsu Ltd | リングトリップ判定回路 |
| US5694465A (en) * | 1995-03-16 | 1997-12-02 | Advanced Micro Devices, Inc. | Integrated ringer for short telephone lines |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3772477A (en) * | 1972-07-17 | 1973-11-13 | Bell Telephone Labor Inc | Telephone dial pulse detection circuit |
| GB1479094A (en) * | 1975-03-25 | 1977-07-06 | Standard Telephones Cables Ltd | Ring trip detectors |
| US4087646A (en) * | 1977-01-28 | 1978-05-02 | Bell Telephone Laboratories, Incorporated | Dual mode telephone subscriber loop current detector |
| 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 |
| 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 |
| US4349703A (en) * | 1980-03-31 | 1982-09-14 | International Telephone And Telegraph Corporation | Programmable ring signal generator |
-
1982
- 1982-04-26 US US06/371,846 patent/US4455456A/en not_active Expired - Lifetime
-
1983
- 1983-04-06 HU HU831190A patent/HU186273B/hu unknown
- 1983-04-11 ZA ZA832522A patent/ZA832522B/xx unknown
- 1983-04-14 NZ NZ203885A patent/NZ203885A/en unknown
- 1983-04-14 PH PH28779A patent/PH21028A/en unknown
- 1983-04-19 GR GR71128A patent/GR78194B/el unknown
- 1983-04-20 BR BR8302051A patent/BR8302051A/pt not_active IP Right Cessation
- 1983-04-20 MX MX196980A patent/MX153055A/es unknown
- 1983-04-20 AU AU13677/83A patent/AU557025B2/en not_active Ceased
- 1983-04-21 AT AT83103908T patent/ATE32409T1/de not_active IP Right Cessation
- 1983-04-21 DE DE8383103908T patent/DE3375632D1/de not_active Expired
- 1983-04-21 PT PT76580A patent/PT76580B/pt unknown
- 1983-04-21 YU YU00915/83A patent/YU91583A/xx unknown
- 1983-04-21 KR KR1019830001758A patent/KR880001651B1/ko active IP Right Grant
- 1983-04-21 EP EP83103908A patent/EP0092807B1/en not_active Expired
- 1983-04-22 DD DD83250128A patent/DD220479A5/de unknown
- 1983-04-22 NO NO831424A patent/NO831424L/no unknown
- 1983-04-25 FI FI831404A patent/FI831404L/fi not_active Application Discontinuation
- 1983-04-25 SU SU833584847A patent/SU1416065A3/ru active
- 1983-04-25 CA CA000426604A patent/CA1190678A/en not_active Expired
- 1983-04-25 MA MA20000A patent/MA19780A1/fr unknown
- 1983-04-25 PL PL24163283A patent/PL241632A1/xx unknown
- 1983-04-25 DK DK181383A patent/DK181383A/da not_active Application Discontinuation
- 1983-04-26 EG EG260/83A patent/EG15506A/xx active
- 1983-04-26 ES ES521845A patent/ES8404128A1/es not_active Expired
- 1983-04-26 TR TR21788A patent/TR21788A/xx unknown
- 1983-04-26 BE BE2/60081A patent/BE896561A/fr not_active IP Right Cessation
- 1983-04-26 IN IN494/CAL/83A patent/IN157100B/en unknown
- 1983-04-26 JP JP58072292A patent/JPS58195353A/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| NZ203885A (en) | 1986-04-11 |
| BR8302051A (pt) | 1983-12-27 |
| HU186273B (en) | 1985-07-29 |
| ES521845A0 (es) | 1984-04-01 |
| EP0092807A2 (en) | 1983-11-02 |
| KR880001651B1 (ko) | 1988-09-03 |
| ATE32409T1 (de) | 1988-02-15 |
| SU1416065A3 (ru) | 1988-08-07 |
| AU557025B2 (en) | 1986-12-04 |
| DE3375632D1 (en) | 1988-03-10 |
| FI831404L (fi) | 1983-10-27 |
| ES8404128A1 (es) | 1984-04-01 |
| GR78194B (pt) | 1984-09-26 |
| MA19780A1 (fr) | 1983-12-31 |
| KR840004841A (ko) | 1984-10-24 |
| MX153055A (es) | 1986-07-22 |
| JPS58195353A (ja) | 1983-11-14 |
| EG15506A (en) | 1986-09-30 |
| EP0092807A3 (en) | 1985-01-09 |
| AU1367783A (en) | 1983-11-03 |
| US4455456A (en) | 1984-06-19 |
| TR21788A (tr) | 1985-07-15 |
| CA1190678A (en) | 1985-07-16 |
| IN157100B (pt) | 1986-01-18 |
| DK181383A (da) | 1983-10-27 |
| EP0092807B1 (en) | 1988-02-03 |
| BE896561A (fr) | 1983-10-26 |
| DD220479A5 (de) | 1985-03-27 |
| NO831424L (no) | 1983-10-27 |
| FI831404A0 (fi) | 1983-04-25 |
| ZA832522B (en) | 1984-01-25 |
| YU91583A (en) | 1986-04-30 |
| PL241632A1 (en) | 1984-03-26 |
| PT76580A (en) | 1983-05-01 |
| PH21028A (en) | 1987-06-30 |
| DK181383D0 (da) | 1983-04-25 |
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