LT4356B - Telefono stotis - Google Patents

Telefono stotis Download PDF

Info

Publication number
LT4356B
LT4356B LT97-146A LT97146A LT4356B LT 4356 B LT4356 B LT 4356B LT 97146 A LT97146 A LT 97146A LT 4356 B LT4356 B LT 4356B
Authority
LT
Lithuania
Prior art keywords
telephone
switch
telephone station
switches
coil
Prior art date
Application number
LT97-146A
Other languages
English (en)
Lithuanian (lt)
Other versions
LT97146A (lt
Inventor
Thomas Seitz
Urs Falk
Original Assignee
Electrowatt 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 Electrowatt Technology Innovation Ag filed Critical Electrowatt Technology Innovation Ag
Publication of LT97146A publication Critical patent/LT97146A/xx
Publication of LT4356B publication Critical patent/LT4356B/lt

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)
LT97-146A 1995-02-10 1997-09-09 Telefono stotis LT4356B (lt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH39195 1995-02-10

Publications (2)

Publication Number Publication Date
LT97146A LT97146A (lt) 1998-03-25
LT4356B true LT4356B (lt) 1998-06-25

Family

ID=4185948

Family Applications (1)

Application Number Title Priority Date Filing Date
LT97-146A LT4356B (lt) 1995-02-10 1997-09-09 Telefono stotis

Country Status (10)

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

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5864618A (en) * 1995-02-10 1999-01-26 Electrowatt Technology Innovation Ag Telephone set having an anti-fraud arrangement which prevents any fraudulent attempt to the telephone
ES2150394B1 (es) * 1999-04-13 2001-06-01 Telefonica Sa Dispositivo de control de fraude aplicable en telefonos publicos mod lares.

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0310371A2 (en) 1987-09-29 1989-04-05 John Leo Therrien Method and apparatus for preventing telephone fraud
US5150403A (en) 1991-05-28 1992-09-22 Jordan H Weaver Coin fraud prevention system for coin telephones

Family Cites Families (3)

* 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
US5086459A (en) * 1990-02-23 1992-02-04 Keptel, Inc. Timing circuit and a secure telephone jack utilizing this circuit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0310371A2 (en) 1987-09-29 1989-04-05 John Leo Therrien Method and apparatus for preventing telephone fraud
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
EP0727898A1 (de) 1996-08-21
EP0727898B1 (de) 1996-09-25
DK0727898T3 (ja) 1997-03-17
YU8596A (sh) 1999-06-15
TW291630B (ja) 1996-11-21
DE59500025D1 (de) 1996-10-31
AR000900A1 (es) 1997-08-06
ES2093534T3 (es) 1996-12-16
ATE143550T1 (de) 1996-10-15
LT97146A (lt) 1998-03-25
GR3021304T3 (en) 1997-01-31

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MM9A Lapsed patents

Effective date: 20000115