FR2542548B1 - Circuit d'interface de ligne telephonique - Google Patents
Circuit d'interface de ligne telephoniqueInfo
- Publication number
- FR2542548B1 FR2542548B1 FR8403213A FR8403213A FR2542548B1 FR 2542548 B1 FR2542548 B1 FR 2542548B1 FR 8403213 A FR8403213 A FR 8403213A FR 8403213 A FR8403213 A FR 8403213A FR 2542548 B1 FR2542548 B1 FR 2542548B1
- Authority
- FR
- France
- Prior art keywords
- interface circuit
- telephone line
- line interface
- telephone
- circuit
- 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
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M7/00—Arrangements for interconnection between switching centres
- H04M7/0096—Trunk circuits
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/22—Arrangements for supervision, monitoring or testing
- H04M3/2272—Subscriber line supervision circuits, e.g. call detection circuits
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Interface Circuits In Exchanges (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/472,936 US4563547A (en) | 1983-03-07 | 1983-03-07 | Loop-start/ground-start line interface circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2542548A1 FR2542548A1 (fr) | 1984-09-14 |
FR2542548B1 true FR2542548B1 (fr) | 1986-11-28 |
Family
ID=23877503
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8403213A Expired FR2542548B1 (fr) | 1983-03-07 | 1984-03-01 | Circuit d'interface de ligne telephonique |
Country Status (5)
Country | Link |
---|---|
US (1) | US4563547A (fr) |
JP (1) | JPH0638671B2 (fr) |
CA (1) | CA1202742A (fr) |
DE (1) | DE3407982C2 (fr) |
FR (1) | FR2542548B1 (fr) |
Families Citing this family (31)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4631362A (en) * | 1984-09-27 | 1986-12-23 | At&T Bell Laboratories | Low resistance origination scan circuit |
CA1231480A (fr) * | 1985-03-15 | 1988-01-12 | John A. Barsellotti | Circuit de ligne a courant constant |
JPS61269491A (ja) * | 1985-05-23 | 1986-11-28 | Nec Corp | 電子回路パツケ−ジ機能設定方式 |
US4866768A (en) * | 1985-06-26 | 1989-09-12 | Siemens Corporate Research & Support, Inc. | Station line interface circuit for a telecommunication network |
AU574277B2 (en) * | 1985-08-20 | 1988-06-30 | Fujitsu Limited | Subscriber line interface circuit |
DE3781190D1 (de) * | 1986-04-23 | 1992-09-24 | Siemens Ag | Schaltungsanordnung fuer den anschluss von anschlussleitungen eines digitalen zeitmultiplex-fernsprechnetzes. |
CA1255026A (fr) * | 1986-12-24 | 1989-05-30 | Mitel Corporation | Circuit de commande de courant continu |
US4993063A (en) * | 1987-03-03 | 1991-02-12 | Kiko Frederick J | Channel unit interface circuit |
CA1257027A (fr) * | 1987-03-10 | 1989-07-04 | Rolf Meier | Circuit de compensation pour amplificateur integrateur |
US4947427A (en) * | 1987-05-15 | 1990-08-07 | Northern Telecom Limited | Protection arrangement for a telephone subscriber line interface circuit |
US4856059A (en) * | 1987-11-13 | 1989-08-08 | Itec, Inc. | Semiconductor subscriber line interface circuit with enhanced survivability |
US4894860A (en) * | 1988-06-07 | 1990-01-16 | Tie/Communications, Inc. | Trunk interface circuitry for telephone systems |
DE59010447D1 (de) * | 1989-05-31 | 1996-09-19 | Siemens Ag | Schnittstelleneinrichtung |
FR2648662B1 (fr) * | 1989-06-19 | 1994-03-18 | Alcatel Business Systems | Joncteur de ligne reseau analogique pour installation telephonique de type prive |
FR2648655B1 (fr) * | 1989-06-19 | 1995-08-18 | Alcatel Business Systems | Detecteur de signalisations, du type taxe telephonique, notamment pour joncteur telephonique |
US5263081A (en) * | 1989-11-01 | 1993-11-16 | Hubbell Incorporated | Method and apparatus for providing on-hook transmission for digital loop carrier channel units |
SE465547B (sv) * | 1990-02-01 | 1991-09-23 | Ericsson Telefon Ab L M | Saett och krets foer likstroemsmatning till en telefonlinje |
US5661794A (en) * | 1992-04-16 | 1997-08-26 | Northern Telecom Limited | Telephone line interface circuit with voltage control |
US5274702A (en) * | 1992-04-16 | 1993-12-28 | Northern Telecom Limited | Wideband telephone line interface circuit |
US5557672A (en) * | 1993-03-10 | 1996-09-17 | Antec Corporation | Channel interface unit |
JPH07162902A (ja) * | 1993-12-13 | 1995-06-23 | Nec Corp | 加入者線地絡検出方式 |
US5619567A (en) * | 1994-10-31 | 1997-04-08 | Advanced Micro Devices | Variable DC feed characteristic in a subscriber line interface circuit |
US5740241A (en) * | 1995-05-12 | 1998-04-14 | Carrier Access Corporation | T1 channel bank control process and apparatus |
DE19733250A1 (de) * | 1997-08-01 | 1999-02-04 | Deutsche Telephonwerk Kabel | Schaltungsanordnung für eine Netzabschlußeinheit |
US6167131A (en) * | 1998-02-20 | 2000-12-26 | Intersil Corporation | Ring generator |
US6735302B1 (en) * | 1999-05-28 | 2004-05-11 | Broadcom Corporation | DSP based SLIC architecture with current-sensing voltage synthesis impedance matching and DC feed control |
AU2001237048A1 (en) * | 2000-02-17 | 2001-08-27 | Analog Devices, Inc. | Isolation system with analog communication across an isolation barrier |
US6707887B2 (en) * | 2001-03-16 | 2004-03-16 | Siemens Information And Communication Networks, Inc. | System and method for automatic detection of loop start and ground start trunks |
JP4237018B2 (ja) | 2003-08-27 | 2009-03-11 | Necインフロンティア株式会社 | グランドスタート方式およびループスタート方式兼用局線トランク回路、局線トランク回路の制御方法、および局線トランク回路の制御用プログラム |
US7308294B2 (en) * | 2005-03-16 | 2007-12-11 | Textronics Inc. | Textile-based electrode system |
DE102014103313A1 (de) * | 2014-03-12 | 2015-09-17 | Lantiq Deutschland Gmbh | Vorrichtung und Verfahren zur Brummsignalkompensation bei analogen Telefoniesignalen |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3721768A (en) * | 1971-10-04 | 1973-03-20 | San Bar Corp | Ground start adapter unit |
CA1112384A (fr) * | 1979-03-29 | 1981-11-10 | Brian Vaughan | Circuit de transposition d'un signal de declenchement par boucle en un signal de declenchement par la terre |
DE2918270C2 (de) * | 1979-05-07 | 1984-11-29 | Siemens AG, 1000 Berlin und 8000 München | Teilnehmeranschlußschaltung mit Erdtastenindikation, hochohmig schaltbarem Speisestromkreis und Isolationsfehlerindikation |
US4283604A (en) * | 1979-06-04 | 1981-08-11 | Tellabs, Inc. | Current source circuits with common mode noise rejection |
DE2939009A1 (de) * | 1979-09-26 | 1981-04-09 | Siemens AG, 1000 Berlin und 8000 München | Schaltungsanordnung zur feststellung des schaltzustandes einer teilnehmeranschlussleitung in fernsprechvermittlungsanlagen |
US4310725A (en) * | 1980-01-17 | 1982-01-12 | Solid State Systems, Inc. | Interface for private branch exchange |
US4361732A (en) * | 1981-02-09 | 1982-11-30 | Northern Telecom Limited | Trunk interface circuit with current compensation |
DE3133890C2 (de) * | 1981-08-27 | 1983-06-09 | Siemens AG, 1000 Berlin und 8000 München | Teilnehmeranschlußschaltung. |
-
1983
- 1983-03-07 US US06/472,936 patent/US4563547A/en not_active Expired - Lifetime
-
1984
- 1984-02-21 CA CA000447893A patent/CA1202742A/fr not_active Expired
- 1984-03-01 FR FR8403213A patent/FR2542548B1/fr not_active Expired
- 1984-03-03 DE DE3407982A patent/DE3407982C2/de not_active Expired
- 1984-03-07 JP JP59042205A patent/JPH0638671B2/ja not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE3407982A1 (de) | 1984-09-20 |
DE3407982C2 (de) | 1986-04-24 |
US4563547A (en) | 1986-01-07 |
FR2542548A1 (fr) | 1984-09-14 |
JPS59168795A (ja) | 1984-09-22 |
CA1202742A (fr) | 1986-04-01 |
JPH0638671B2 (ja) | 1994-05-18 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |