FR895987A - Safety device in dual-current voice-frequency telegraph transmission systems - Google Patents

Safety device in dual-current voice-frequency telegraph transmission systems

Info

Publication number
FR895987A
FR895987A FR895987DA FR895987A FR 895987 A FR895987 A FR 895987A FR 895987D A FR895987D A FR 895987DA FR 895987 A FR895987 A FR 895987A
Authority
FR
France
Prior art keywords
dual
safety device
transmission systems
current voice
telegraph 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.)
Alcatel Lucent SAS
Original Assignee
Compagnie Generale dElectricite 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 Compagnie Generale dElectricite SA filed Critical Compagnie Generale dElectricite SA
Application granted granted Critical
Publication of FR895987A publication Critical patent/FR895987A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
FR895987D 1943-03-12 1943-03-12 Safety device in dual-current voice-frequency telegraph transmission systems Expired FR895987A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR895987T 1943-03-12

Publications (1)

Publication Number Publication Date
FR895987A true FR895987A (en) 1945-02-08

Family

ID=9390981

Family Applications (1)

Application Number Title Priority Date Filing Date
FR895987D Expired FR895987A (en) 1943-03-12 1943-03-12 Safety device in dual-current voice-frequency telegraph transmission systems

Country Status (2)

Country Link
BE (1) BE454534A (en)
FR (1) FR895987A (en)

Also Published As

Publication number Publication date
BE454534A (en)

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