LT97146A - TELEPHONE STATION - Google Patents

TELEPHONE STATION

Info

Publication number
LT97146A
LT97146A LT97-146A LT97146A LT97146A LT 97146 A LT97146 A LT 97146A LT 97146 A LT97146 A LT 97146A LT 97146 A LT97146 A LT 97146A
Authority
LT
Lithuania
Prior art keywords
telephone station
telephone
station
Prior art date
Application number
LT97-146A
Other languages
Lithuanian (lt)
Other versions
LT4356B (en
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/en
Publication of LT4356B publication Critical patent/LT4356B/en

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 Telephone set LT4356B (en)

Applications Claiming Priority (1)

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

Publications (2)

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

Family

ID=4185948

Family Applications (1)

Application Number Title Priority Date Filing Date
LT97-146A LT4356B (en) 1995-02-10 1997-09-09 Telephone set

Country Status (10)

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

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 (en) * 1999-04-13 2001-06-01 Telefonica Sa APPLICABLE FRAUD CONTROL DEVICE ON MOD LARES PUBLIC TELEPHONES.

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2434529A1 (en) * 1978-08-21 1980-03-21 App Automatiques Ste Fse Electronic circuit connected in telephone line - prevents fraudulent use of line by monitoring line current and shorting line in preset circumstances
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

Also Published As

Publication number Publication date
DE59500025D1 (en) 1996-10-31
AR000900A1 (en) 1997-08-06
TW291630B (en) 1996-11-21
YU8596A (en) 1999-06-15
EP0727898A1 (en) 1996-08-21
GR3021304T3 (en) 1997-01-31
LT4356B (en) 1998-06-25
EP0727898B1 (en) 1996-09-25
ATE143550T1 (en) 1996-10-15
ES2093534T3 (en) 1996-12-16
DK0727898T3 (en) 1997-03-17

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Legal Events

Date Code Title Description
MM9A Lapsed patents

Effective date: 20000115