FR2379951A1 - Dispositif de detection des appels malicieux dans un systeme telephonique - Google Patents

Dispositif de detection des appels malicieux dans un systeme telephonique

Info

Publication number
FR2379951A1
FR2379951A1 FR7802892A FR7802892A FR2379951A1 FR 2379951 A1 FR2379951 A1 FR 2379951A1 FR 7802892 A FR7802892 A FR 7802892A FR 7802892 A FR7802892 A FR 7802892A FR 2379951 A1 FR2379951 A1 FR 2379951A1
Authority
FR
France
Prior art keywords
sender
store
interception
telephone system
calling subscriber
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.)
Granted
Application number
FR7802892A
Other languages
English (en)
Other versions
FR2379951B3 (fr
Inventor
Kurt Wappler
Gunter Krop
Axel Pietsch
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
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 International Standard Electric Corp filed Critical International Standard Electric Corp
Publication of FR2379951A1 publication Critical patent/FR2379951A1/fr
Application granted granted Critical
Publication of FR2379951B3 publication Critical patent/FR2379951B3/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Telephonic Communication Services (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Devices For Supply Of Signal Current (AREA)

Abstract

Dispositif d'identification de l'origine d'appels malicieux. ou malveillants dans un autocommutateur télephonique à sélecteurs rotatifs et commande décentralisée. L'invention assure une identification plus rapide et plus simple que les systèmes connus en effectuant l'interception des appels vers l'abonné TIn B qui en a fait la demande, pendant l'etablissement de ces derniers. La position correspondante du sélecteur terminal LW est connectée à un équipement FE qui intercepte le courant de sonnerie et émet SI la fréquence de retour d'appel 425 Hz en même temps qu'une fréquence de demande d'identification 1000 Hz. Celle-ci est reçue E1 par un équipement auxiliaire ZE connecté côte appelant (sélecteur de groupe IGW) où un émetteur S2 associé à un circuit classique d'identification de ligne appelante Id fournit l'indication requise en code multifréquence. Le code est reçu E2 et mis en mémoire Sp2 par l'équipement FE qui transmet ensuite l'appel à TIn B.
FR7802892A 1977-02-08 1978-02-02 Dispositif de detection des appels malicieux dans un systeme telephonique Granted FR2379951A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19772705137 DE2705137C2 (de) 1977-02-08 1977-02-08 Schaltungsanordnung zum Fangen in einem Fernsprechsystem

Publications (2)

Publication Number Publication Date
FR2379951A1 true FR2379951A1 (fr) 1978-09-01
FR2379951B3 FR2379951B3 (fr) 1980-10-10

Family

ID=6000590

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7802892A Granted FR2379951A1 (fr) 1977-02-08 1978-02-02 Dispositif de detection des appels malicieux dans un systeme telephonique

Country Status (3)

Country Link
DE (1) DE2705137C2 (fr)
ES (1) ES466777A1 (fr)
FR (1) FR2379951A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0076646A1 (fr) * 1981-10-02 1983-04-13 Sonintel Sociedade Nacional De Industria De Telecomunicacoes Ltda. Système d'interception d'une ligne appelante et détecteur d'identification
US4754475A (en) * 1981-10-02 1988-06-28 Sonintel Sociedade Nacional De Industria De Telecomunicacoes Ltda. Calling line tracing system and identification detector

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1148027B (it) * 1981-03-03 1986-11-26 Cselt Centro Studi Lab Telecom Sistema per la propagazione lungo un collegamento telefonico dell i dentita degli utenti interessati a tale collegamento
DE3326979A1 (de) * 1983-07-27 1985-02-07 Siemens AG, 1000 Berlin und 8000 München Schaltungsanordnung fuer fernmeldevermittlungssysteme mit direktwahl

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1239741B (de) * 1965-07-28 1967-05-03 Siemens Ag Schaltungsanordnung fuer Fernmeldeanlagen, insbesondere Fernsprechanlagen, mit Einrichtungen zur automatischen Verbindungs-verfolgung
DE2657880A1 (de) * 1976-12-21 1978-06-22 Standard Elektrik Lorenz Ag Fernsprechwaehlsystem

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0076646A1 (fr) * 1981-10-02 1983-04-13 Sonintel Sociedade Nacional De Industria De Telecomunicacoes Ltda. Système d'interception d'une ligne appelante et détecteur d'identification
US4754475A (en) * 1981-10-02 1988-06-28 Sonintel Sociedade Nacional De Industria De Telecomunicacoes Ltda. Calling line tracing system and identification detector

Also Published As

Publication number Publication date
FR2379951B3 (fr) 1980-10-10
DE2705137A1 (de) 1978-08-10
DE2705137C2 (de) 1983-04-21
ES466777A1 (es) 1978-10-01

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Legal Events

Date Code Title Description
ST Notification of lapse
AR Application made for restoration
BR Restoration of rights