FR721644A - Device for measuring transmission levels - Google Patents

Device for measuring transmission levels

Info

Publication number
FR721644A
FR721644A FR721644DA FR721644A FR 721644 A FR721644 A FR 721644A FR 721644D A FR721644D A FR 721644DA FR 721644 A FR721644 A FR 721644A
Authority
FR
France
Prior art keywords
transmission levels
measuring transmission
measuring
levels
transmission
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.)
Expired
Application number
Other languages
French (fr)
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.)
Lignes Telegraphiques et Telephoniques LTT SA
Original Assignee
Lignes Telegraphiques et Telephoniques LTT SA
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 Lignes Telegraphiques et Telephoniques LTT SA filed Critical Lignes Telegraphiques et Telephoniques LTT SA
Application granted granted Critical
Publication of FR721644A publication Critical patent/FR721644A/en
Expired 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
FR721644D 1930-11-14 1930-11-14 Device for measuring transmission levels Expired FR721644A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR721644T 1930-11-14

Publications (1)

Publication Number Publication Date
FR721644A true FR721644A (en) 1932-03-05

Family

ID=9098185

Family Applications (2)

Application Number Title Priority Date Filing Date
FR721644D Expired FR721644A (en) 1930-11-14 1930-11-14 Device for measuring transmission levels
FR40737D Expired FR40737E (en) 1930-11-14 1931-02-27 Device for measuring transmission levels

Family Applications After (1)

Application Number Title Priority Date Filing Date
FR40737D Expired FR40737E (en) 1930-11-14 1931-02-27 Device for measuring transmission levels

Country Status (2)

Country Link
FR (2) FR721644A (en)
GB (1) GB388477A (en)

Also Published As

Publication number Publication date
FR40737E (en) 1932-08-22
GB388477A (en) 1933-03-02

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