FR2374795A1 - Equipement de ligne d'abonne pour central telephonique - Google Patents
Equipement de ligne d'abonne pour central telephoniqueInfo
- Publication number
- FR2374795A1 FR2374795A1 FR7638031A FR7638031A FR2374795A1 FR 2374795 A1 FR2374795 A1 FR 2374795A1 FR 7638031 A FR7638031 A FR 7638031A FR 7638031 A FR7638031 A FR 7638031A FR 2374795 A1 FR2374795 A1 FR 2374795A1
- Authority
- FR
- France
- Prior art keywords
- subscriber line
- line equipment
- telephone
- telephone central
- equipment
- 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.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/005—Interface circuits for subscriber lines
Abstract
Equipement destiné à remplacer les équipements à translateur ou à hacheur. Il comporte un circuit d'alimentation de la ligne téléphonique (branchée entre 1 et 2) constitué par deux sources de tension il et 21, un transistor 10, un transformateur 4, deux transistors PNP 6 et 7, un équipement redresseur 3, un circuit de détection de boucle 14 et enfin des circuits de réception et d'émission reliés au central téléphonique respectivement par les bornes 16 et 25. Application aux centraux téléphoniques.
Priority Applications (17)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7638031A FR2374795A1 (fr) | 1976-12-17 | 1976-12-17 | Equipement de ligne d'abonne pour central telephonique |
NL7713209A NL7713209A (nl) | 1976-12-17 | 1977-11-30 | Abonneelijninrichting voor telefooncentrale. |
ES464741A ES464741A1 (es) | 1976-12-17 | 1977-12-05 | Equipo de linea de abonado para central telefonica. |
US05/857,901 US4119806A (en) | 1976-12-17 | 1977-12-06 | Subscriber's line equipment for a telephone exchange |
DE19772754995 DE2754995A1 (de) | 1976-12-17 | 1977-12-09 | Ausruestung fuer teilnehmerleitungen fuer fernsprechaemter |
GB51518/77A GB1540553A (en) | 1976-12-17 | 1977-12-12 | Subscriber's telephone line equipment |
ZA00777417A ZA777417B (en) | 1976-12-17 | 1977-12-13 | Subscriber's line equipment for a telephone exchange |
AR270343A AR214764A1 (es) | 1976-12-17 | 1977-12-13 | Dispositivo de linea de abonado para central telefonica |
AU31499/77A AU3149977A (en) | 1976-12-17 | 1977-12-13 | Subscriber's line equipment for a telephone exchange |
BR7708306A BR7708306A (pt) | 1976-12-17 | 1977-12-14 | Equipamento de linha de assinante para central telefonica |
LU78693A LU78693A1 (fr) | 1976-12-17 | 1977-12-15 | |
DD7700202662A DD133387A5 (de) | 1976-12-17 | 1977-12-15 | Schaltungsanordnung fuer teilnehmerleitungen fuer fernsprechaemter |
BE1008583A BE861868A (fr) | 1976-12-17 | 1977-12-15 | Equipement de ligne d'abonne pour central telephonique |
OA56345A OA05828A (fr) | 1976-12-17 | 1977-12-16 | Equipement de ligne d'abonné pour central téléphonique. |
IT52254/77A IT1090819B (it) | 1976-12-17 | 1977-12-16 | Apaprecchiatura di linea d'abbonato per centrale telefonica |
SE7714362A SE7714362L (sv) | 1976-12-17 | 1977-12-16 | Abonnentlinjeutrustning for telefonstation |
JP15158477A JPS5376605A (en) | 1976-12-17 | 1977-12-16 | Telephone exchange subscriber line device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7638031A FR2374795A1 (fr) | 1976-12-17 | 1976-12-17 | Equipement de ligne d'abonne pour central telephonique |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2374795A1 true FR2374795A1 (fr) | 1978-07-13 |
Family
ID=9181173
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7638031A Withdrawn FR2374795A1 (fr) | 1976-12-17 | 1976-12-17 | Equipement de ligne d'abonne pour central telephonique |
Country Status (17)
Country | Link |
---|---|
US (1) | US4119806A (fr) |
JP (1) | JPS5376605A (fr) |
AR (1) | AR214764A1 (fr) |
AU (1) | AU3149977A (fr) |
BE (1) | BE861868A (fr) |
BR (1) | BR7708306A (fr) |
DD (1) | DD133387A5 (fr) |
DE (1) | DE2754995A1 (fr) |
ES (1) | ES464741A1 (fr) |
FR (1) | FR2374795A1 (fr) |
GB (1) | GB1540553A (fr) |
IT (1) | IT1090819B (fr) |
LU (1) | LU78693A1 (fr) |
NL (1) | NL7713209A (fr) |
OA (1) | OA05828A (fr) |
SE (1) | SE7714362L (fr) |
ZA (1) | ZA777417B (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0118545A1 (fr) * | 1982-09-13 | 1984-09-19 | The Board Of Trustees Of The Leland Stanford Junior University | Interface de ligne telephonique a modulation par largeur d'impulsion |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5537046A (en) * | 1978-09-06 | 1980-03-14 | Nec Corp | Subscriber's circuit |
DE2903660C3 (de) * | 1979-01-31 | 1981-12-10 | Siemens AG, 1000 Berlin und 8000 München | Belegschaltung an einer "ankommenden" c-Ader in einer Fernmeldeeinrichtung |
WO1981000658A1 (fr) * | 1979-08-31 | 1981-03-05 | Electro Med Eng Pty Ltd | Affaiblisseur non-reciproque de donnees de lignes telephoniques |
US4402039A (en) * | 1981-09-03 | 1983-08-30 | Bell Telephone Laboratories, Incorporated | Telephone line circuit |
DE3171608D1 (en) * | 1981-10-28 | 1985-09-05 | Ibm | Line circuit containing impedance adaptation means |
US4458112A (en) * | 1981-10-29 | 1984-07-03 | Telefonaktiebolaget L M Ericsson | Floating subscriber loop interface circuit |
US4532381A (en) * | 1984-02-13 | 1985-07-30 | Northern Telecom Limited | Active impedance line feed circuit |
US4805213A (en) * | 1987-02-13 | 1989-02-14 | Unison Technologies, Inc. | Ring detector |
CA2025014C (fr) * | 1989-01-19 | 1994-11-22 | Kazumi Kinoshita | Detecteur de fuites a la terre |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4011410A (en) * | 1973-11-13 | 1977-03-08 | Thomas Robert M | Communication system interface circuits |
-
1976
- 1976-12-17 FR FR7638031A patent/FR2374795A1/fr not_active Withdrawn
-
1977
- 1977-11-30 NL NL7713209A patent/NL7713209A/xx not_active Application Discontinuation
- 1977-12-05 ES ES464741A patent/ES464741A1/es not_active Expired
- 1977-12-06 US US05/857,901 patent/US4119806A/en not_active Expired - Lifetime
- 1977-12-09 DE DE19772754995 patent/DE2754995A1/de active Pending
- 1977-12-12 GB GB51518/77A patent/GB1540553A/en not_active Expired
- 1977-12-13 AR AR270343A patent/AR214764A1/es active
- 1977-12-13 ZA ZA00777417A patent/ZA777417B/xx unknown
- 1977-12-13 AU AU31499/77A patent/AU3149977A/en active Pending
- 1977-12-14 BR BR7708306A patent/BR7708306A/pt unknown
- 1977-12-15 BE BE1008583A patent/BE861868A/fr unknown
- 1977-12-15 LU LU78693A patent/LU78693A1/xx unknown
- 1977-12-15 DD DD7700202662A patent/DD133387A5/xx unknown
- 1977-12-16 IT IT52254/77A patent/IT1090819B/it active
- 1977-12-16 OA OA56345A patent/OA05828A/fr unknown
- 1977-12-16 SE SE7714362A patent/SE7714362L/xx unknown
- 1977-12-16 JP JP15158477A patent/JPS5376605A/ja active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0118545A1 (fr) * | 1982-09-13 | 1984-09-19 | The Board Of Trustees Of The Leland Stanford Junior University | Interface de ligne telephonique a modulation par largeur d'impulsion |
EP0118545A4 (fr) * | 1982-09-13 | 1987-03-30 | Univ Leland Stanford Junior | Interface de ligne telephonique a modulation par largeur d'impulsion. |
Also Published As
Publication number | Publication date |
---|---|
GB1540553A (en) | 1979-02-14 |
SE7714362L (sv) | 1978-06-18 |
JPS5376605A (en) | 1978-07-07 |
AR214764A1 (es) | 1979-07-31 |
ES464741A1 (es) | 1978-09-01 |
AU3149977A (en) | 1979-06-21 |
DD133387A5 (de) | 1978-12-27 |
BR7708306A (pt) | 1978-09-05 |
DE2754995A1 (de) | 1978-06-29 |
OA05828A (fr) | 1981-05-31 |
LU78693A1 (fr) | 1978-04-17 |
BE861868A (fr) | 1978-03-31 |
ZA777417B (en) | 1978-10-25 |
NL7713209A (nl) | 1978-06-20 |
US4119806A (en) | 1978-10-10 |
IT1090819B (it) | 1985-06-26 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |