AR000900A1 - Una estacion telefonica de pago previo con elemento de seguridad para evitar defraudacion. - Google Patents
Una estacion telefonica de pago previo con elemento de seguridad para evitar defraudacion.Info
- Publication number
- AR000900A1 AR000900A1 ARP960101333A AR10133396A AR000900A1 AR 000900 A1 AR000900 A1 AR 000900A1 AR P960101333 A ARP960101333 A AR P960101333A AR 10133396 A AR10133396 A AR 10133396A AR 000900 A1 AR000900 A1 AR 000900A1
- Authority
- AR
- Argentina
- Prior art keywords
- telephone station
- coil
- switches
- switch
- measurement
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/66—Substation equipment, e.g. for use by subscribers with means for preventing unauthorised or fraudulent calling
- H04M1/667—Preventing unauthorised calls from a telephone set
- H04M1/67—Preventing unauthorised calls from a telephone set by electronic means
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/66—Substation equipment, e.g. for use by subscribers with means for preventing unauthorised or fraudulent calling
- H04M1/667—Preventing unauthorised calls from a telephone set
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M17/00—Prepayment of wireline communication systems, wireless communication systems or telephone systems
- H04M17/02—Coin-freed or check-freed systems, e.g. mobile- or card-operated phones, public telephones or booths
- H04M17/023—Circuit arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Near-Field Transmission Systems (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
Una estación telefónica (1) con un auricular (14) puede conectarse mediante un primer y un segundo interruptor (6, 7) a través de dos líneas (2, 3) con unacentral telefónica (5). Con los interruptores (6, 7) cerrados, la estación telefónica (1)puede ser alimentada con energía eléctrica desde la centraltelefónica (5). En el interior de la estación telefónica (1) están conectados eléctricamente en serie el primer interruptor (6), una primera bobina (8), unapieza conectora (10), unasegunda bobina (9) y el segundo interruptor (7). Los interruptores (6, 7) pueden ser accionados a través del auricular (14) de laestación telefónica (1). Las dos bobinas (8, 9) están arrolladas en sentidos de arrollamiento opuestos alrededor de uncuerpo ( 12) de material magnético. Seprevée además una bobina de medición (11) y una conexión de medición (13) para generar un campo magnético alterno en el cuerpo (12) y para la medición delcociente diferencial temporal dB/dt de la inducciónmagnética B(t) que se produce en el cuerpo (12) y para la generación de una senal para abrir losinterruptores (6, 7), en el caso que el cociente diferencial dB/dt medido cumpla con criterios preestablecidos. Las bobinas (8, 9), el cuerpomagnético(12), la bobina de medición (11) y la conexión de medición (13) sirven para evitar intentos de defraudación.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH39195 | 1995-02-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
AR000900A1 true AR000900A1 (es) | 1997-08-06 |
Family
ID=4185948
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ARP960101333A AR000900A1 (es) | 1995-02-10 | 1996-02-09 | Una estacion telefonica de pago previo con elemento de seguridad para evitar defraudacion. |
Country Status (10)
Country | Link |
---|---|
EP (1) | EP0727898B1 (es) |
AR (1) | AR000900A1 (es) |
AT (1) | ATE143550T1 (es) |
DE (1) | DE59500025D1 (es) |
DK (1) | DK0727898T3 (es) |
ES (1) | ES2093534T3 (es) |
GR (1) | GR3021304T3 (es) |
LT (1) | LT4356B (es) |
TW (1) | TW291630B (es) |
YU (1) | YU8596A (es) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1996025000A1 (de) * | 1995-02-10 | 1996-08-15 | Landis & Gyr Technology Innovation Ag | Telefonstation |
ES2150394B1 (es) * | 1999-04-13 | 2001-06-01 | Telefonica Sa | Dispositivo de control de fraude aplicable en telefonos publicos mod lares. |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2434529A1 (fr) * | 1978-08-21 | 1980-03-21 | App Automatiques Ste Fse | Dispositif anti-fraude pour poste telephonique |
US4759054A (en) * | 1986-12-22 | 1988-07-19 | Protel, Inc. | Toll telephone system and method for maintaining or initiating loop current after resuming on-hook condition |
US4885767A (en) | 1987-09-29 | 1989-12-05 | Therrien John L | Blue-box fraud prevention |
US5086459A (en) * | 1990-02-23 | 1992-02-04 | Keptel, Inc. | Timing circuit and a secure telephone jack utilizing this circuit |
US5150403A (en) | 1991-05-28 | 1992-09-22 | Jordan H Weaver | Coin fraud prevention system for coin telephones |
-
1995
- 1995-06-08 DE DE59500025T patent/DE59500025D1/de not_active Expired - Fee Related
- 1995-06-08 DK DK95108824.4T patent/DK0727898T3/da not_active Application Discontinuation
- 1995-06-08 EP EP95108824A patent/EP0727898B1/de not_active Expired - Lifetime
- 1995-06-08 AT AT95108824T patent/ATE143550T1/de not_active IP Right Cessation
- 1995-06-08 ES ES95108824T patent/ES2093534T3/es not_active Expired - Lifetime
-
1996
- 1996-01-19 TW TW085100625A patent/TW291630B/zh active
- 1996-02-09 YU YU8596A patent/YU8596A/sh unknown
- 1996-02-09 AR ARP960101333A patent/AR000900A1/es unknown
- 1996-10-09 GR GR960402676T patent/GR3021304T3/el unknown
-
1997
- 1997-09-09 LT LT97-146A patent/LT4356B/lt not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
DE59500025D1 (de) | 1996-10-31 |
EP0727898B1 (de) | 1996-09-25 |
DK0727898T3 (es) | 1997-03-17 |
ES2093534T3 (es) | 1996-12-16 |
LT4356B (lt) | 1998-06-25 |
GR3021304T3 (en) | 1997-01-31 |
EP0727898A1 (de) | 1996-08-21 |
ATE143550T1 (de) | 1996-10-15 |
TW291630B (es) | 1996-11-21 |
YU8596A (sh) | 1999-06-15 |
LT97146A (lt) | 1998-03-25 |
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