IT1291472B1 - Dispositivo di riscontro di obliterazione per apparecchi telefonici pubblici. - Google Patents

Dispositivo di riscontro di obliterazione per apparecchi telefonici pubblici.

Info

Publication number
IT1291472B1
IT1291472B1 IT97TO000057A ITTO970057A IT1291472B1 IT 1291472 B1 IT1291472 B1 IT 1291472B1 IT 97TO000057 A IT97TO000057 A IT 97TO000057A IT TO970057 A ITTO970057 A IT TO970057A IT 1291472 B1 IT1291472 B1 IT 1291472B1
Authority
IT
Italy
Prior art keywords
obliteration
feeding device
public telephone
telephone equipment
equipment
Prior art date
Application number
IT97TO000057A
Other languages
English (en)
Inventor
Massimo Mondardini
Original Assignee
Urmet Sud Costruzioni Elettro
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 Urmet Sud Costruzioni Elettro filed Critical Urmet Sud Costruzioni Elettro
Priority to IT97TO000057A priority Critical patent/IT1291472B1/it
Priority to AU62122/98A priority patent/AU6212298A/en
Priority to PCT/EP1998/000353 priority patent/WO1998033308A2/en
Publication of ITTO970057A1 publication Critical patent/ITTO970057A1/it
Application granted granted Critical
Publication of IT1291472B1 publication Critical patent/IT1291472B1/it

Links

Classifications

    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/001—Current supply source at the exchanger providing current to substations
    • H04M19/006—Circuits for increasing the range of current supply source

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Computer Security & Cryptography (AREA)
  • Prepayment Telephone Systems (AREA)
  • Telephone Set Structure (AREA)
IT97TO000057A 1997-01-27 1997-01-27 Dispositivo di riscontro di obliterazione per apparecchi telefonici pubblici. IT1291472B1 (it)

Priority Applications (3)

Application Number Priority Date Filing Date Title
IT97TO000057A IT1291472B1 (it) 1997-01-27 1997-01-27 Dispositivo di riscontro di obliterazione per apparecchi telefonici pubblici.
AU62122/98A AU6212298A (en) 1997-01-27 1998-01-23 Validation-checking device for public telephones
PCT/EP1998/000353 WO1998033308A2 (en) 1997-01-27 1998-01-23 Validation-checking device for public telephones

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT97TO000057A IT1291472B1 (it) 1997-01-27 1997-01-27 Dispositivo di riscontro di obliterazione per apparecchi telefonici pubblici.

Publications (2)

Publication Number Publication Date
ITTO970057A1 ITTO970057A1 (it) 1998-07-27
IT1291472B1 true IT1291472B1 (it) 1999-01-11

Family

ID=11415265

Family Applications (1)

Application Number Title Priority Date Filing Date
IT97TO000057A IT1291472B1 (it) 1997-01-27 1997-01-27 Dispositivo di riscontro di obliterazione per apparecchi telefonici pubblici.

Country Status (3)

Country Link
AU (1) AU6212298A (it)
IT (1) IT1291472B1 (it)
WO (1) WO1998033308A2 (it)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2783994B1 (fr) * 1998-09-28 2000-10-13 Schlumberger Ind Sa Dispositif de securisation d'une ligne telephonique
FR2784840B1 (fr) * 1998-10-14 2000-12-15 Schlumberger Ind Sa Dispositif de securisation d'une ligne telephonique

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4599492A (en) * 1983-12-27 1986-07-08 David Otten Coin-telephone auditor
FR2614162B1 (fr) * 1987-04-17 1993-12-10 Flonic Sa Systeme d'authentification analogique reciproque entre un terminal et une ligne de transmission
FR2646305B1 (fr) * 1989-04-19 1991-06-14 Dassault Electronique Dispositif electronique de codage, notamment pour publiphone
US5133005A (en) * 1991-02-15 1992-07-21 Elcotel, Inc. Line powered pay telephone with power management
US5216707A (en) * 1991-08-06 1993-06-01 International Teleservice Corp. Circuit for firing paystation coin relay using power derived from telephone line tip/ring voltage

Also Published As

Publication number Publication date
WO1998033308A3 (en) 1998-09-11
ITTO970057A1 (it) 1998-07-27
AU6212298A (en) 1998-08-18
WO1998033308A2 (en) 1998-07-30

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Legal Events

Date Code Title Description
0001 Granted