FR2358064A1 - Dispositif d'observation permanente de lignes telephoniques de securite - Google Patents

Dispositif d'observation permanente de lignes telephoniques de securite

Info

Publication number
FR2358064A1
FR2358064A1 FR7620649A FR7620649A FR2358064A1 FR 2358064 A1 FR2358064 A1 FR 2358064A1 FR 7620649 A FR7620649 A FR 7620649A FR 7620649 A FR7620649 A FR 7620649A FR 2358064 A1 FR2358064 A1 FR 2358064A1
Authority
FR
France
Prior art keywords
line
signal indicating
appts
partial suppression
telephone line
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
FR7620649A
Other languages
English (en)
French (fr)
Other versions
FR2358064B1 (enExample
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to FR7620649A priority Critical patent/FR2358064A1/fr
Publication of FR2358064A1 publication Critical patent/FR2358064A1/fr
Application granted granted Critical
Publication of FR2358064B1 publication Critical patent/FR2358064B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/22—Arrangements for supervision, monitoring or testing
    • H04M3/26—Arrangements for supervision, monitoring or testing with means for applying test signals or for measuring
    • H04M3/28—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor
    • H04M3/30—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor for subscriber's lines, for the local loop
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Alarm Systems (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
FR7620649A 1976-07-06 1976-07-06 Dispositif d'observation permanente de lignes telephoniques de securite Granted FR2358064A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7620649A FR2358064A1 (fr) 1976-07-06 1976-07-06 Dispositif d'observation permanente de lignes telephoniques de securite

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7620649A FR2358064A1 (fr) 1976-07-06 1976-07-06 Dispositif d'observation permanente de lignes telephoniques de securite

Publications (2)

Publication Number Publication Date
FR2358064A1 true FR2358064A1 (fr) 1978-02-03
FR2358064B1 FR2358064B1 (enExample) 1981-09-25

Family

ID=9175319

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7620649A Granted FR2358064A1 (fr) 1976-07-06 1976-07-06 Dispositif d'observation permanente de lignes telephoniques de securite

Country Status (1)

Country Link
FR (1) FR2358064A1 (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4760592A (en) * 1985-02-07 1988-07-26 Secom General Corporation Wire tap detection device with passive testing

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4760592A (en) * 1985-02-07 1988-07-26 Secom General Corporation Wire tap detection device with passive testing

Also Published As

Publication number Publication date
FR2358064B1 (enExample) 1981-09-25

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Legal Events

Date Code Title Description
ST Notification of lapse