FR2358066A1 - TELEPHONE LINE CIRCUIT - Google Patents
TELEPHONE LINE CIRCUITInfo
- Publication number
- FR2358066A1 FR2358066A1 FR7720791A FR7720791A FR2358066A1 FR 2358066 A1 FR2358066 A1 FR 2358066A1 FR 7720791 A FR7720791 A FR 7720791A FR 7720791 A FR7720791 A FR 7720791A FR 2358066 A1 FR2358066 A1 FR 2358066A1
- Authority
- FR
- France
- Prior art keywords
- line
- hook
- controlled
- telephone line
- line 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Monitoring And Testing Of Exchanges (AREA)
- Devices For Supply Of Signal Current (AREA)
- Interface Circuits In Exchanges (AREA)
Abstract
Circuit de ligne téléphonique d'abonné comportant un élément à effet Hall pour indiquer l'état de la ligne. L'élément de Hall HED est commandé par un courant constant et par le champ magnétique produit par le transformateur T1 d'alimentation de la ligne. Son signal de sortie est appliqué à un codeur-décodeur SCD qui indique à l'unité de commande du central l'état d'ouverture ou de fermeture de boucle selon que ce signal est nul ou non. On détecte ainsi le décrochage ou le raccrochage de l'abonné et les impulsions de numérotation. Des enroulements supplémentaires de T1 permettent de connecter le générateur de courant de sonnerie ou une table d'essai à la ligne, via des transistors de commutation S1-S4 commandés par l'unité centrale. Application aux centraux de commutation à commande et réseau de connexion électroniques.A subscriber telephone line circuit with a Hall effect element to indicate the condition of the line. The Hall element HED is controlled by a constant current and by the magnetic field produced by the line supply transformer T1. Its output signal is applied to an SCD encoder-decoder which indicates to the central office control unit the state of loop opening or closing depending on whether this signal is zero or not. This detects the off-hook or on-hook of the subscriber and the dialing pulses. Additional windings of T1 allow the ringing current generator or a test table to be connected to the line, via switching transistors S1-S4 controlled by the central unit. Application to switching centers with electronic control and connection network.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2843076A GB1542724A (en) | 1976-07-08 | 1976-07-08 | Line circuits for telecommunication exchanges |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR2358066A1 true FR2358066A1 (en) | 1978-02-03 |
Family
ID=10275513
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7720791A Pending FR2358066A1 (en) | 1976-07-08 | 1977-07-06 | TELEPHONE LINE CIRCUIT |
Country Status (9)
| Country | Link |
|---|---|
| JP (1) | JPS537109A (en) |
| BE (1) | BE856597R (en) |
| CA (1) | CA1090495A (en) |
| CH (1) | CH622653A5 (en) |
| DE (1) | DE2730413A1 (en) |
| ES (1) | ES460550A1 (en) |
| FR (1) | FR2358066A1 (en) |
| GB (1) | GB1542724A (en) |
| NL (1) | NL7707474A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2504734Y2 (en) * | 1992-10-09 | 1996-07-10 | ザ・パック株式会社 | Hanger |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5245607B2 (en) * | 1973-08-29 | 1977-11-17 | ||
| JPS5415176B2 (en) * | 1973-09-04 | 1979-06-13 | ||
| JPS518685A (en) * | 1974-07-13 | 1976-01-23 | Toyoda Machine Works Ltd | TOROKOIDOSOSE ISOCHI |
| JPS5150605A (en) * | 1974-10-30 | 1976-05-04 | Hitachi Ltd | DAIYARU PARUSUCHUKEI HOSHIKI |
-
1976
- 1976-07-08 GB GB2843076A patent/GB1542724A/en not_active Expired
-
1977
- 1977-06-30 CA CA281,781A patent/CA1090495A/en not_active Expired
- 1977-07-06 JP JP8003877A patent/JPS537109A/en active Pending
- 1977-07-06 FR FR7720791A patent/FR2358066A1/en active Pending
- 1977-07-06 DE DE19772730413 patent/DE2730413A1/en not_active Withdrawn
- 1977-07-06 NL NL7707474A patent/NL7707474A/en not_active Application Discontinuation
- 1977-07-08 ES ES460550A patent/ES460550A1/en not_active Expired
- 1977-07-08 CH CH850777A patent/CH622653A5/en not_active IP Right Cessation
- 1977-07-08 BE BE2056065A patent/BE856597R/en active
Also Published As
| Publication number | Publication date |
|---|---|
| NL7707474A (en) | 1978-01-10 |
| DE2730413A1 (en) | 1978-01-19 |
| GB1542724A (en) | 1979-03-21 |
| CH622653A5 (en) | 1981-04-15 |
| BE856597R (en) | 1978-01-09 |
| JPS537109A (en) | 1978-01-23 |
| ES460550A1 (en) | 1978-05-16 |
| CA1090495A (en) | 1980-11-25 |
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