FR929982A - Système téléphonique - Google Patents

Système téléphonique

Info

Publication number
FR929982A
FR929982A FR929982DA FR929982A FR 929982 A FR929982 A FR 929982A FR 929982D A FR929982D A FR 929982DA FR 929982 A FR929982 A FR 929982A
Authority
FR
France
Prior art keywords
telephone system
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.)
Automatic Electric Laboratories Inc
Original Assignee
Automatic Electric Laboratories Inc
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 Automatic Electric Laboratories Inc filed Critical Automatic Electric Laboratories Inc
Application granted granted Critical
Publication of FR929982A publication Critical patent/FR929982A/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
    • H04Q1/444—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)
FR929982D 1942-04-28 1946-06-28 Système téléphonique Expired FR929982A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB929982X 1942-04-28

Publications (1)

Publication Number Publication Date
FR929982A true FR929982A (fr) 1948-01-13

Family

ID=10728252

Family Applications (1)

Application Number Title Priority Date Filing Date
FR929982D Expired FR929982A (fr) 1942-04-28 1946-06-28 Système téléphonique

Country Status (1)

Country Link
FR (1) FR929982A (fr)

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