FR27497E - Improvements to electrical signaling systems - Google Patents

Improvements to electrical signaling systems

Info

Publication number
FR27497E
FR27497E FR27497DA FR27497E FR 27497 E FR27497 E FR 27497E FR 27497D A FR27497D A FR 27497DA FR 27497 E FR27497 E FR 27497E
Authority
FR
France
Prior art keywords
signaling systems
electrical signaling
electrical
systems
signaling
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.)
Thales SA
Original Assignee
Le Materiel Telephonique Thomson CSF
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 Le Materiel Telephonique Thomson CSF filed Critical Le Materiel Telephonique Thomson CSF
Application granted granted Critical
Publication of FR27497E publication Critical patent/FR27497E/en
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
    • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/446—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency
    • H04Q1/4465—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency the same frequency being used for all signalling information, e.g. A.C. nr.9 system

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
FR27497D 1923-02-19 1923-02-19 Improvements to electrical signaling systems Expired FR27497E (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR27497T 1923-02-19

Publications (1)

Publication Number Publication Date
FR27497E true FR27497E (en) 1924-07-07

Family

ID=8665803

Family Applications (1)

Application Number Title Priority Date Filing Date
FR27497D Expired FR27497E (en) 1923-02-19 1923-02-19 Improvements to electrical signaling systems

Country Status (1)

Country Link
FR (1) FR27497E (en)

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