ES2146187A1 - Protector de linea telefonica. - Google Patents
Protector de linea telefonica.Info
- Publication number
- ES2146187A1 ES2146187A1 ES009802543A ES9802543A ES2146187A1 ES 2146187 A1 ES2146187 A1 ES 2146187A1 ES 009802543 A ES009802543 A ES 009802543A ES 9802543 A ES9802543 A ES 9802543A ES 2146187 A1 ES2146187 A1 ES 2146187A1
- Authority
- ES
- Spain
- Prior art keywords
- telephone line
- block
- switching block
- line protector
- switching
- 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.)
- Granted
Links
Landscapes
- Alarm Systems (AREA)
- Sub-Exchange Stations And Push- Button Telephones (AREA)
Abstract
Protector de línea telefónica. Comprende un protector de entrada (1) de una línea telefónica (2) y se caracteriza por el hecho de que comprende un primer bloque de conmutación (4) conectado a dicho protector de entrada (1); un bloque detector de llamada (5) conectado a dicho primer bloque de conmutación (4); un segundo bloque de conmutación (6) conectado a dicho primer bloque de conmutación (4) y a tierra (3); un bloque de detección (7) de los cambios de estado en la línea telefónica interior (8); un tercer bloque de conmutación (9) conectado a dicho segundo bloque de conmutación (6), al bloque de detección (7) de los cambios de estado en la línea telefónica interior (8) y a dicha línea telefónica interior; y una unidad central de procesos (10). **FIGURA**
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES9802543A ES2146187B1 (es) | 1998-12-04 | 1998-12-04 | Protector de linea telefonica. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES9802543A ES2146187B1 (es) | 1998-12-04 | 1998-12-04 | Protector de linea telefonica. |
Publications (2)
Publication Number | Publication Date |
---|---|
ES2146187A1 true ES2146187A1 (es) | 2000-07-16 |
ES2146187B1 ES2146187B1 (es) | 2001-03-01 |
Family
ID=8306014
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES9802543A Expired - Fee Related ES2146187B1 (es) | 1998-12-04 | 1998-12-04 | Protector de linea telefonica. |
Country Status (1)
Country | Link |
---|---|
ES (1) | ES2146187B1 (es) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1437874A (en) * | 1974-07-31 | 1976-06-03 | Post Office | Opto-couplers |
JPS60146597A (ja) * | 1984-01-10 | 1985-08-02 | Nippon Telegr & Teleph Corp <Ntt> | 宅内制御装置の制御方式 |
US4720845A (en) * | 1986-04-23 | 1988-01-19 | Siemens Aktiengesellschaft | Protective circuit for the overvoltage protection of a subscriber line interconnect circuit |
EP0571109A2 (en) * | 1992-05-18 | 1993-11-24 | AT&T Corp. | Overvoltage protection scheme for subscriber loops and method of performing same |
EP0798910A1 (fr) * | 1996-03-26 | 1997-10-01 | STMicroelectronics S.A. | Protection contre les surtensions d'une interface de lignes téléphoniques |
US5696391A (en) * | 1994-05-09 | 1997-12-09 | Sgs-Thomson Microelectronics S.A. | Overload protection circuit |
-
1998
- 1998-12-04 ES ES9802543A patent/ES2146187B1/es not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1437874A (en) * | 1974-07-31 | 1976-06-03 | Post Office | Opto-couplers |
JPS60146597A (ja) * | 1984-01-10 | 1985-08-02 | Nippon Telegr & Teleph Corp <Ntt> | 宅内制御装置の制御方式 |
US4720845A (en) * | 1986-04-23 | 1988-01-19 | Siemens Aktiengesellschaft | Protective circuit for the overvoltage protection of a subscriber line interconnect circuit |
EP0571109A2 (en) * | 1992-05-18 | 1993-11-24 | AT&T Corp. | Overvoltage protection scheme for subscriber loops and method of performing same |
US5696391A (en) * | 1994-05-09 | 1997-12-09 | Sgs-Thomson Microelectronics S.A. | Overload protection circuit |
EP0798910A1 (fr) * | 1996-03-26 | 1997-10-01 | STMicroelectronics S.A. | Protection contre les surtensions d'une interface de lignes téléphoniques |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN, CD-ROM PAJ H04 Q R S (1976-1993) & JP 60146597 A (NTT CORP.) 02.08.1985 * |
Also Published As
Publication number | Publication date |
---|---|
ES2146187B1 (es) | 2001-03-01 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EC2A | Search report published |
Date of ref document: 20000716 Kind code of ref document: A1 Effective date: 20000716 |
|
FD1A | Patent lapsed |
Effective date: 20101018 |