FR731596A - Perfectionnements aux transmissions téléphoniques - Google Patents

Perfectionnements aux transmissions téléphoniques

Info

Publication number
FR731596A
FR731596A FR731596DA FR731596A FR 731596 A FR731596 A FR 731596A FR 731596D A FR731596D A FR 731596DA FR 731596 A FR731596 A FR 731596A
Authority
FR
France
Prior art keywords
telephone transmissions
transmissions
telephone
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)
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.)
SOC ET LIAISONS TELEPHONIQUES
Original Assignee
SOC ET LIAISONS TELEPHONIQUES
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 SOC ET LIAISONS TELEPHONIQUES filed Critical SOC ET LIAISONS TELEPHONIQUES
Application granted granted Critical
Publication of FR731596A publication Critical patent/FR731596A/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)
FR731596D 1932-02-19 1932-02-19 Perfectionnements aux transmissions téléphoniques Expired FR731596A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR731596T 1932-02-19

Publications (1)

Publication Number Publication Date
FR731596A true FR731596A (fr) 1932-09-05

Family

ID=9118763

Family Applications (1)

Application Number Title Priority Date Filing Date
FR731596D Expired FR731596A (fr) 1932-02-19 1932-02-19 Perfectionnements aux transmissions téléphoniques

Country Status (1)

Country Link
FR (1) FR731596A (fr)

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