YU8596A - Telefonski aparat - Google Patents

Telefonski aparat

Info

Publication number
YU8596A
YU8596A YU8596A YU8596A YU8596A YU 8596 A YU8596 A YU 8596A YU 8596 A YU8596 A YU 8596A YU 8596 A YU8596 A YU 8596A YU 8596 A YU8596 A YU 8596A
Authority
YU
Yugoslavia
Prior art keywords
switch
telephone
measuring
telephone set
switches
Prior art date
Application number
YU8596A
Other languages
English (en)
Inventor
Thomas Seitz
Urs Falk
Original Assignee
Landis & Gyr Technology Innovation Ag.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Landis & Gyr Technology Innovation Ag. filed Critical Landis & Gyr Technology Innovation Ag.
Publication of YU8596A publication Critical patent/YU8596A/sh

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

Telefonski aparat (1) sa slušalicom (14), može se pomoću prvog i drugog prekidača (8,7) posredstvom dva voda (2,3) povezati sa telefonskom centralom (5). Telefonski se aparat (1) kod zatvorenih prekidača (6,7) može preko vodova (2,3) napajati električnom energijom od telefonske centrale (5). U telefonskom su aparatu (1) prvi prekidač (6), prvi prekidač (6), kolo (10), drugi kalem (9) i drugi prekidač (7) električno povezani redno. Prekidači (6, 7) mogu se aktivirati slušalicom (14) telefonskog aparata (1). Kalemovi (8, 9) su namotani u suprotnim smerovima namotavanja na jedno telo (12) od magnetnog materijala. Dalje je predvidjena merni kalem (11) i merno kolo (13) za generisanje jednog sinusoidnog magnetnog polja u telu (12) i za merenje vremenskog odvodjenja dB/dt magnetne indukcije B(t) nastale u telu (12) i za generisanje jednog signala za otvaranje prekidača (6, 7) ako mereno odvodjenje dB/dt ispunjava unapred odredjene kriterijume. Kalemovi (8, 9), magnetno telo (12), merni kalem (11) i merno kolo (13) služe za sprečavanje pokušaja prevare.
YU8596A 1995-02-10 1996-02-09 Telefonski aparat YU8596A (sh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH39195 1995-02-10
EP95108824A EP0727898B1 (de) 1995-02-10 1995-06-08 Telefonstation

Publications (1)

Publication Number Publication Date
YU8596A true YU8596A (sh) 1999-06-15

Family

ID=4185948

Family Applications (1)

Application Number Title Priority Date Filing Date
YU8596A YU8596A (sh) 1995-02-10 1996-02-09 Telefonski aparat

Country Status (10)

Country Link
EP (1) EP0727898B1 (sh)
AR (1) AR000900A1 (sh)
AT (1) ATE143550T1 (sh)
DE (1) DE59500025D1 (sh)
DK (1) DK0727898T3 (sh)
ES (1) ES2093534T3 (sh)
GR (1) GR3021304T3 (sh)
LT (1) LT4356B (sh)
TW (1) TW291630B (sh)
YU (1) YU8596A (sh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU699535B2 (en) * 1995-02-10 1998-12-03 Electrowatt Technology Innovation Ag Telephone station
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)

* Cited by examiner, † Cited by third party
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
EP0310371A2 (en) 1987-09-29 1989-04-05 John Leo Therrien Method and apparatus for preventing telephone fraud
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

Also Published As

Publication number Publication date
EP0727898B1 (de) 1996-09-25
DK0727898T3 (sh) 1997-03-17
AR000900A1 (es) 1997-08-06
LT97146A (lt) 1998-03-25
DE59500025D1 (de) 1996-10-31
EP0727898A1 (de) 1996-08-21
LT4356B (lt) 1998-06-25
TW291630B (sh) 1996-11-21
ATE143550T1 (de) 1996-10-15
ES2093534T3 (es) 1996-12-16
GR3021304T3 (en) 1997-01-31

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