BE440078A - - Google Patents

Info

Publication number
BE440078A
BE440078A BE440078DA BE440078A BE 440078 A BE440078 A BE 440078A BE 440078D A BE440078D A BE 440078DA BE 440078 A BE440078 A BE 440078A
Authority
BE
Belgium
Application number
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.)
Publication of BE440078A publication Critical patent/BE440078A/xx

Links

Classifications

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
BE440078D 1939-05-22 BE440078A (xx)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB15248/39A GB529644A (en) 1939-05-22 1939-05-22 Improvements in or relating to telephone systems

Publications (1)

Publication Number Publication Date
BE440078A true BE440078A (xx)

Family

ID=10055691

Family Applications (1)

Application Number Title Priority Date Filing Date
BE440078D BE440078A (xx) 1939-05-22

Country Status (3)

Country Link
US (1) US2282900A (xx)
BE (1) BE440078A (xx)
GB (1) GB529644A (xx)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3657714A (en) * 1970-06-10 1972-04-18 Electro Devices Inc Ground eliminator system

Also Published As

Publication number Publication date
US2282900A (en) 1942-05-12
GB529644A (en) 1940-11-26

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