BE774977A - Equipement de surveillance d'etat d'urgence - Google Patents

Equipement de surveillance d'etat d'urgence

Info

Publication number
BE774977A
BE774977A BE774977A BE774977A BE774977A BE 774977 A BE774977 A BE 774977A BE 774977 A BE774977 A BE 774977A BE 774977 A BE774977 A BE 774977A BE 774977 A BE774977 A BE 774977A
Authority
BE
Belgium
Prior art keywords
surveillance equipment
emergency surveillance
emergency
equipment
surveillance
Prior art date
Application number
BE774977A
Other languages
English (en)
Original Assignee
Nippon Telegraph & Telephone
Oki Electric Ind Co Ltd
Nippon Electric Co
Hitachi Ltd
Fujitsu Ltd
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 Nippon Telegraph & Telephone, Oki Electric Ind Co Ltd, Nippon Electric Co, Hitachi Ltd, Fujitsu Ltd filed Critical Nippon Telegraph & Telephone
Publication of BE774977A publication Critical patent/BE774977A/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker
    • H04Q3/54—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker in which the logic circuitry controlling the exchange is centralised
    • H04Q3/545—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker in which the logic circuitry controlling the exchange is centralised using a stored program
    • 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
    • H04M3/32—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor for lines between exchanges
    • H04M3/323—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor for lines between exchanges for the arrangements providing the connection (test connection, test call, call simulation)

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Exchange Systems With Centralized Control (AREA)
BE774977A 1970-11-06 1971-11-05 Equipement de surveillance d'etat d'urgence BE774977A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9714070A JPS5136009B1 (fr) 1970-11-06 1970-11-06

Publications (1)

Publication Number Publication Date
BE774977A true BE774977A (fr) 1972-03-01

Family

ID=14184248

Family Applications (1)

Application Number Title Priority Date Filing Date
BE774977A BE774977A (fr) 1970-11-06 1971-11-05 Equipement de surveillance d'etat d'urgence

Country Status (4)

Country Link
JP (1) JPS5136009B1 (fr)
BE (1) BE774977A (fr)
DE (1) DE2155173C3 (fr)
FR (1) FR2112512B1 (fr)

Also Published As

Publication number Publication date
JPS5136009B1 (fr) 1976-10-06
FR2112512A1 (fr) 1972-06-16
FR2112512B1 (fr) 1975-02-21
DE2155173A1 (de) 1972-05-25
DE2155173C3 (de) 1978-07-27
DE2155173B2 (de) 1977-12-08

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Legal Events

Date Code Title Description
RE Patent lapsed

Owner name: NIPPON TELEGRAPH AND TELEPHONE CORP.

Effective date: 19881130