FR954872A - - Google Patents

Info

Publication number
FR954872A
FR954872A FR954872DA FR954872A FR 954872 A FR954872 A FR 954872A FR 954872D A FR954872D A FR 954872DA FR 954872 A FR954872 A FR 954872A
Authority
FR
France
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
Publication date
Application granted granted Critical
Publication of FR954872A publication Critical patent/FR954872A/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)
FR954872D Expired FR954872A (fr)

Publications (1)

Publication Number Publication Date
FR954872A true FR954872A (fr) 1950-01-06

Family

ID=1557703

Family Applications (1)

Application Number Title Priority Date Filing Date
FR954872D Expired FR954872A (fr)

Country Status (1)

Country Link
FR (1) FR954872A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE967406C (de) * 1952-08-03 1957-11-07 Standard Elek K Ag Schaltungsanordnung zur Signalgabe mittels Wechselstrom beliebiger Frequenz

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE967406C (de) * 1952-08-03 1957-11-07 Standard Elek K Ag Schaltungsanordnung zur Signalgabe mittels Wechselstrom beliebiger Frequenz

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