FR952270A - Systèmes de communication et de signalisation - Google Patents

Systèmes de communication et de signalisation

Info

Publication number
FR952270A
FR952270A FR952270DA FR952270A FR 952270 A FR952270 A FR 952270A FR 952270D A FR952270D A FR 952270DA FR 952270 A FR952270 A FR 952270A
Authority
FR
France
Prior art keywords
communication
signaling systems
signaling
systems
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
English (en)
Inventor
Emile Labin
Donald David Grieg
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
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 International Standard Electric Corp filed Critical International Standard Electric Corp
Application granted granted Critical
Publication of FR952270A publication Critical patent/FR952270A/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/442—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies
    • H04Q1/4423—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies using one signalling frequency

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
FR952270D 1946-08-24 1947-08-22 Systèmes de communication et de signalisation Expired FR952270A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US952270XA 1946-08-24 1946-08-24

Publications (1)

Publication Number Publication Date
FR952270A true FR952270A (fr) 1949-11-14

Family

ID=22250779

Family Applications (1)

Application Number Title Priority Date Filing Date
FR952270D Expired FR952270A (fr) 1946-08-24 1947-08-22 Systèmes de communication et de signalisation

Country Status (1)

Country Link
FR (1) FR952270A (fr)

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