PT102250A - Equipment for protecting the closed circuit of a subscriber telephone line against fraudulent use - Google Patents

Equipment for protecting the closed circuit of a subscriber telephone line against fraudulent use Download PDF

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Publication number
PT102250A
PT102250A PT10225099A PT10225099A PT102250A PT 102250 A PT102250 A PT 102250A PT 10225099 A PT10225099 A PT 10225099A PT 10225099 A PT10225099 A PT 10225099A PT 102250 A PT102250 A PT 102250A
Authority
PT
Portugal
Prior art keywords
line
protecting
equipment
closed circuit
subscriber
Prior art date
Application number
PT10225099A
Other languages
Portuguese (pt)
Other versions
PT102250B (en
Inventor
Francisco Javier Hernan Romero
Luis De La Torre
Original Assignee
Telefonica Sa
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 Telefonica Sa filed Critical Telefonica Sa
Publication of PT102250A publication Critical patent/PT102250A/en
Publication of PT102250B publication Critical patent/PT102250B/en

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  • Interface Circuits In Exchanges (AREA)
  • Prepayment Telephone Systems (AREA)
  • Meter Arrangements (AREA)
  • Telephonic Communication Services (AREA)

Abstract

Equipment for protecting the subscriber telephone loop, closed circuit, intended to prevent the making of fraudulent calls by third parties, consisting of a subscriber element 1 and a reader element 6, the former of which incorporates a power supply module 3 from its own line, another module 5 for line monitoring to detect pick-up outside the subscriber's system and cutting of the line, for which it has line drop detector units 16, outside pick-up detector units 15, and a unit 4 for monitoring and memorising of data on fraudulent calls, consisting of a switching unit 14 and a control unit 17, and able to determine the short circuiting of the network by injecting a predetermined frequency signal; the reader device 6 extracts the control data 17 and has means 23 of processing same and means 24 of visual display of same. <IMAGE>
PT10225099A 1998-02-04 1999-02-03 CLOSED CIRCUIT PROTECTION EQUIPMENT OF TELEPHONE LINE OF SUBSCRIBER AGAINST FRAUDULENT USE PT102250B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES9800208A ES2136578B1 (en) 1998-02-04 1998-02-04 PROTECTION EQUIPMENT OF THE TELEPHONE LOOP OF SUBSCRIBER.

Publications (2)

Publication Number Publication Date
PT102250A true PT102250A (en) 1999-08-31
PT102250B PT102250B (en) 2000-08-31

Family

ID=8302626

Family Applications (1)

Application Number Title Priority Date Filing Date
PT10225099A PT102250B (en) 1998-02-04 1999-02-03 CLOSED CIRCUIT PROTECTION EQUIPMENT OF TELEPHONE LINE OF SUBSCRIBER AGAINST FRAUDULENT USE

Country Status (6)

Country Link
AR (1) AR014537A1 (en)
BR (1) BR9900537A (en)
ES (1) ES2136578B1 (en)
MA (1) MA24755A1 (en)
PE (1) PE20000363A1 (en)
PT (1) PT102250B (en)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4969178A (en) * 1989-10-26 1990-11-06 Telecommunication Laboratories, Directorate General of Telecommunications , Ministry of Communications Multipurpose subscriber local line monitoring device
FR2674397A1 (en) * 1991-03-20 1992-09-25 Regnier Marc Device for monitoring a subscriber line allowing detection and recording of electrical signals related to an illicit tapping
FR2691599B1 (en) * 1992-05-22 2001-08-10 France Telecom Device for controlling access to a telephone line.
GB9226779D0 (en) * 1992-12-23 1993-02-17 Plessey Telecomm Customer identity validation
JPH0795284A (en) * 1993-09-20 1995-04-07 Fujitsu Ltd Communications terminal provided with function for detecting and preventing lie branching
US5559874A (en) * 1995-03-13 1996-09-24 Panosh; Richard Telephone service protection device
FR2765061B1 (en) * 1997-06-23 1999-10-08 Jean Noel Bruere ELECTRONIC DEVICE FOR DETECTING FRAUDULENT USES OF A TELEPHONE LINE AND FOR DETERRENCE AGAINST SUCH USES

Also Published As

Publication number Publication date
AR014537A1 (en) 2001-02-28
PT102250B (en) 2000-08-31
PE20000363A1 (en) 2000-04-10
BR9900537A (en) 2001-03-20
ES2136578A1 (en) 1999-11-16
MA24755A1 (en) 1999-10-01
ES2136578B1 (en) 2000-08-01

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Legal Events

Date Code Title Description
BB1A Laying open of patent application

Effective date: 19990416

FG3A Patent granted, date of granting

Effective date: 20000522