DE3673717D1 - Schutzanordnung fuer eine interface-schaltung eines fernsprechanschlusskabels. - Google Patents
Schutzanordnung fuer eine interface-schaltung eines fernsprechanschlusskabels.Info
- Publication number
- DE3673717D1 DE3673717D1 DE8686304079T DE3673717T DE3673717D1 DE 3673717 D1 DE3673717 D1 DE 3673717D1 DE 8686304079 T DE8686304079 T DE 8686304079T DE 3673717 T DE3673717 T DE 3673717T DE 3673717 D1 DE3673717 D1 DE 3673717D1
- Authority
- DE
- Germany
- Prior art keywords
- contacts
- zero crossing
- interface circuit
- relay
- isolation relay
- 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
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
- H02H3/087—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current for dc applications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/18—Automatic or semi-automatic exchanges with means for reducing interference or noise; with means for reducing effects due to line faults with means for protecting lines
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Emergency Protection Circuit Devices (AREA)
- Interface Circuits In Exchanges (AREA)
- Amplifiers (AREA)
- Communication Cables (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA000484398A CA1233583A (en) | 1985-06-18 | 1985-06-18 | Protection arrangement for a telephone subscriber line interface circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3673717D1 true DE3673717D1 (de) | 1990-10-04 |
Family
ID=4130747
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE8686304079T Expired - Fee Related DE3673717D1 (de) | 1985-06-18 | 1986-05-29 | Schutzanordnung fuer eine interface-schaltung eines fernsprechanschlusskabels. |
Country Status (6)
Country | Link |
---|---|
US (1) | US4709296A (de) |
EP (1) | EP0209973B1 (de) |
JP (1) | JPS61293115A (de) |
AT (1) | ATE56117T1 (de) |
CA (1) | CA1233583A (de) |
DE (1) | DE3673717D1 (de) |
Families Citing this family (46)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4922363A (en) * | 1985-10-17 | 1990-05-01 | General Electric Company | Contactor control system |
US4947427A (en) * | 1987-05-15 | 1990-08-07 | Northern Telecom Limited | Protection arrangement for a telephone subscriber line interface circuit |
CA1260171A (en) * | 1987-05-15 | 1989-09-26 | Reinhard W. Rosch | Protection arrangement for a telephone subscriber line interface circuit |
US4890002A (en) * | 1987-11-09 | 1989-12-26 | Perma Power Electronics, Inc. | Line voltage fault detector for appliance protection |
US4856059A (en) * | 1987-11-13 | 1989-08-08 | Itec, Inc. | Semiconductor subscriber line interface circuit with enhanced survivability |
IT1223618B (it) * | 1987-12-28 | 1990-09-29 | Sgs Thomson Microelectronics | Circuito di interfaccia tra linea telefonica d'utente ed organi di comando centrale, con limitazione del consumo di corrente in caso di cavo a terra |
GB8802434D0 (en) * | 1988-02-03 | 1988-03-02 | British Telecomm | Protector device |
US4864157A (en) * | 1988-05-12 | 1989-09-05 | Spatron Corporation | Reduced arcing contact switching circuit |
AU629603B2 (en) * | 1989-04-20 | 1992-10-08 | Oneac Corporation | Telephone lines overvoltage protection apparatus |
US5146384A (en) * | 1989-04-28 | 1992-09-08 | Northern Telecom Limited | Automatically resetting protection arrangement for a telephone subscriber line interface circuit |
US5189697A (en) * | 1990-04-30 | 1993-02-23 | Northern Telecom Limited | Line interface circuit |
US5245654A (en) * | 1991-10-10 | 1993-09-14 | Cermetek Microelectronics, Inc. | Solid state isolation device using opto-isolators |
US5392349A (en) * | 1992-05-18 | 1995-02-21 | At&T Corp. | Overvoltage protection scheme for subscriber loops and method of performing same |
US5410193A (en) * | 1992-10-02 | 1995-04-25 | Eastman Kodak Company | Apparatus and technique for connecting a source of zero crossing AC voltage to and disconnecting it from an AC load line |
US5390231A (en) * | 1993-04-01 | 1995-02-14 | Northern Telecom Limited | Protection and recovery of telephone line interface circuits |
JP2639304B2 (ja) * | 1993-06-15 | 1997-08-13 | 日本電気株式会社 | 加入者回路 |
US5490171A (en) * | 1994-03-09 | 1996-02-06 | International Business Machines Corporation | Single-port network node transceiver with powered-down protection |
US5777836A (en) * | 1994-04-01 | 1998-07-07 | U.S. Robotics Mobile Communications Corp. | Line current protection circuit and method for use with a PCMCIA-architecture modem card |
US5532898A (en) * | 1994-04-01 | 1996-07-02 | Megahertz Corporation | Line current protection circuit for use with a PCMCIA-architecture modem card |
DE19733250A1 (de) * | 1997-08-01 | 1999-02-04 | Deutsche Telephonwerk Kabel | Schaltungsanordnung für eine Netzabschlußeinheit |
US6351533B1 (en) | 1998-01-26 | 2002-02-26 | Xircom, Inc. | System and method for protecting devices connected to a telephone line |
US6088446A (en) * | 1998-05-06 | 2000-07-11 | Actiontec Electronics, Inc. | Protection circuit for use with a telephone appliance and methods of use |
US6188764B1 (en) | 1998-05-27 | 2001-02-13 | Actiontec Electronics, Inc. | Over-voltage protection circuit for use with a telephone appliance |
US6885745B1 (en) * | 1998-12-17 | 2005-04-26 | Nortel Networks, Ltd. | Voltage and protection arrangement for a telephone subscriber line interface circuit |
US6639934B1 (en) * | 1999-04-26 | 2003-10-28 | Telefonaktiebolaget Lm Ericsson (Publ) | Power control in a CDMA mobile communication system |
US6563926B1 (en) | 1999-07-27 | 2003-05-13 | Nortel Networks Limited | Resetting surge protection in telephone line interface circuits |
US6778664B1 (en) | 2000-03-14 | 2004-08-17 | 3Com Corporation | Line current protection circuit and method for linear and nonlinear hold circuit |
US6748077B2 (en) * | 2002-03-26 | 2004-06-08 | Aaron S. Ford | Station interface and protector with built in redundancy |
US6922323B1 (en) | 2002-12-17 | 2005-07-26 | Alcatel | Protection circuitry for a subscriber line interface circuit (SLIC) arrangement |
US7301432B1 (en) | 2005-01-11 | 2007-11-27 | Tii Network Technologies, Inc. | Fusing terminal device |
US20070159738A1 (en) * | 2006-01-09 | 2007-07-12 | Eaton Corporation | Receptacle providing sustained excessive voltage protection |
US7940922B2 (en) * | 2006-07-06 | 2011-05-10 | Uniden Corporation | Telephone interface circuit |
US7822195B2 (en) * | 2006-07-06 | 2010-10-26 | Uniden Corporation | Telephone interface circuit |
US7995744B2 (en) * | 2007-01-31 | 2011-08-09 | Uniden Corporation | Telephone interface circuit |
US20080285741A1 (en) * | 2007-05-16 | 2008-11-20 | Uniden Corporation | Telephone interface circuit |
US8411848B2 (en) * | 2008-11-11 | 2013-04-02 | Uniden Corporation | Telephone interface circuit for providing over-current and over-voltage protection |
US11056981B2 (en) | 2018-07-07 | 2021-07-06 | Intelesol, Llc | Method and apparatus for signal extraction with sample and hold and release |
US11581725B2 (en) | 2018-07-07 | 2023-02-14 | Intelesol, Llc | Solid-state power interrupters |
US11671029B2 (en) | 2018-07-07 | 2023-06-06 | Intelesol, Llc | AC to DC converters |
US11848550B2 (en) | 2018-07-25 | 2023-12-19 | Mitsubishi Electric Corporation | Semiconductor circuit breaker and circuit breaking device |
US11334388B2 (en) | 2018-09-27 | 2022-05-17 | Amber Solutions, Inc. | Infrastructure support to enhance resource-constrained device capabilities |
US11349296B2 (en) | 2018-10-01 | 2022-05-31 | Intelesol, Llc | Solid-state circuit interrupters |
US10834792B2 (en) | 2018-12-17 | 2020-11-10 | Intelesol, Llc | AC-driven light-emitting diode systems |
US11170964B2 (en) | 2019-05-18 | 2021-11-09 | Amber Solutions, Inc. | Intelligent circuit breakers with detection circuitry configured to detect fault conditions |
US11349297B2 (en) | 2020-01-21 | 2022-05-31 | Amber Solutions, Inc. | Intelligent circuit interruption |
WO2022036016A1 (en) | 2020-08-11 | 2022-02-17 | Amber Solutions, Inc. | Intelligent energy source monitoring and selection control system |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3671807A (en) * | 1970-12-07 | 1972-06-20 | Peripheral Systems Corp | Control apparatus |
CH541227A (de) * | 1971-11-22 | 1973-10-15 | Siemens Ag | Vorauslösegerät für einen Synchronschalter |
JPS53138209A (en) * | 1977-05-09 | 1978-12-02 | Hitachi Ltd | Protective system of trunk circuit |
US4197435A (en) * | 1978-02-24 | 1980-04-08 | Jackson Amos R | Telephone line monitoring circuit and method |
JPS5930358B2 (ja) * | 1979-05-23 | 1984-07-26 | 株式会社日立製作所 | 電話交換機用電流供給回路 |
US4241372A (en) * | 1979-03-01 | 1980-12-23 | Entron, Inc. | Power supply protective circuit |
JPS6022571B2 (ja) * | 1979-12-05 | 1985-06-03 | 株式会社日立製作所 | 地絡保護方式 |
GB2065418B (en) * | 1979-12-06 | 1984-02-15 | Standard Telephones Cables Ltd | Telephone line feed |
NL8100242A (nl) * | 1981-01-20 | 1982-08-16 | Philips Nv | Overspanningsbeveiliging van een lijncircuit. |
US4431868A (en) * | 1981-07-09 | 1984-02-14 | International Telephone And Telegraph Corporation | Solid state telephone line interface circuit with ringing capability |
JPS5895461A (ja) * | 1981-12-02 | 1983-06-07 | Hitachi Ltd | 過電圧保護回路 |
CA1179078A (en) * | 1982-06-04 | 1984-12-04 | Stanley D. Rosenbaum | Active impedance line feed circuit |
US4467310A (en) * | 1983-10-03 | 1984-08-21 | Northern Telecom Limited | Telephone subscriber line battery feed resistor arrangements |
-
1985
- 1985-06-18 CA CA000484398A patent/CA1233583A/en not_active Expired
- 1985-06-20 US US06/747,581 patent/US4709296A/en not_active Expired - Lifetime
-
1986
- 1986-05-29 AT AT86304079T patent/ATE56117T1/de not_active IP Right Cessation
- 1986-05-29 EP EP86304079A patent/EP0209973B1/de not_active Expired - Lifetime
- 1986-05-29 DE DE8686304079T patent/DE3673717D1/de not_active Expired - Fee Related
- 1986-06-16 JP JP61138416A patent/JPS61293115A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
ATE56117T1 (de) | 1990-09-15 |
EP0209973B1 (de) | 1990-08-29 |
US4709296A (en) | 1987-11-24 |
CA1233583A (en) | 1988-03-01 |
JPS61293115A (ja) | 1986-12-23 |
EP0209973A1 (de) | 1987-01-28 |
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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 |