FR2395557A1 - Installation de signalisation d'effractions de cabines publiques telephoniques et cabines ainsi equipees - Google Patents

Installation de signalisation d'effractions de cabines publiques telephoniques et cabines ainsi equipees

Info

Publication number
FR2395557A1
FR2395557A1 FR7718908A FR7718908A FR2395557A1 FR 2395557 A1 FR2395557 A1 FR 2395557A1 FR 7718908 A FR7718908 A FR 7718908A FR 7718908 A FR7718908 A FR 7718908A FR 2395557 A1 FR2395557 A1 FR 2395557A1
Authority
FR
France
Prior art keywords
call box
exchange
detection system
signal
telephone
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
FR7718908A
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CANAAN JACQUES
Original Assignee
CANAAN JACQUES
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 CANAAN JACQUES filed Critical CANAAN JACQUES
Priority to FR7718908A priority Critical patent/FR2395557A1/fr
Publication of FR2395557A1 publication Critical patent/FR2395557A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
    • G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
    • G08B25/08—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using communication transmission lines
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/04—Telephonic communication systems specially adapted for combination with other electrical systems with alarm systems, e.g. fire, police or burglar alarm systems

Abstract

L'invention concerne une installation de signalisation d'effractions de cabines publiques téléphoniques. Cette installation est basée sur la présence d'un signal compatible avec les caractéristiques techniques des lignes téléphoniques, mais séparé par des filtres, des bandes de fréquences normalement utilisees pour les communications téléphoniques, ce signal peut être établi sur la ligne par l'intermédiaire de différents contacts normalement fermé, la disposition de ce signal, soit par coupure de la ligne, soit par effraction d'un système protégé par un contact normalement fermé, déclenche une alarme qui peut être transmise à un service de surveillance, le signal est généré par un oscillateur basse-fréquence à contrôle automatique, afin de distinguer un défaut de l'oscillateur, d'une effraction réelle. L'invention s'applique au domaine des télécommunications.
FR7718908A 1977-06-21 1977-06-21 Installation de signalisation d'effractions de cabines publiques telephoniques et cabines ainsi equipees Withdrawn FR2395557A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7718908A FR2395557A1 (fr) 1977-06-21 1977-06-21 Installation de signalisation d'effractions de cabines publiques telephoniques et cabines ainsi equipees

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7718908A FR2395557A1 (fr) 1977-06-21 1977-06-21 Installation de signalisation d'effractions de cabines publiques telephoniques et cabines ainsi equipees

Publications (1)

Publication Number Publication Date
FR2395557A1 true FR2395557A1 (fr) 1979-01-19

Family

ID=9192327

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7718908A Withdrawn FR2395557A1 (fr) 1977-06-21 1977-06-21 Installation de signalisation d'effractions de cabines publiques telephoniques et cabines ainsi equipees

Country Status (1)

Country Link
FR (1) FR2395557A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4758823A (en) * 1986-01-22 1988-07-19 Yves Berruyer System for protecting a group of locations of a network by anticipating vandalism
US4896348A (en) * 1988-07-01 1990-01-23 Palco Telecom Inc. Paystation monitor circuit to prevent fraudulent use
FR2685600A1 (fr) * 1991-12-20 1993-06-25 Robart Yves Systeme de surveillance d'une pluralite d'armoires electriques, et notamment d'armoires de sous-repartition telephonique.

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4758823A (en) * 1986-01-22 1988-07-19 Yves Berruyer System for protecting a group of locations of a network by anticipating vandalism
US4896348A (en) * 1988-07-01 1990-01-23 Palco Telecom Inc. Paystation monitor circuit to prevent fraudulent use
FR2685600A1 (fr) * 1991-12-20 1993-06-25 Robart Yves Systeme de surveillance d'une pluralite d'armoires electriques, et notamment d'armoires de sous-repartition telephonique.

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Legal Events

Date Code Title Description
ST Notification of lapse