FR951756A - Telephone installation - Google Patents

Telephone installation

Info

Publication number
FR951756A
FR951756A FR951756DA FR951756A FR 951756 A FR951756 A FR 951756A FR 951756D A FR951756D A FR 951756DA FR 951756 A FR951756 A FR 951756A
Authority
FR
France
Prior art keywords
telephone installation
telephone
installation
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.)
AT&T Corp
Original Assignee
Western Electric Co 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
Priority claimed from US231477A external-priority patent/US2206538A/en
Application filed by Western Electric Co Inc filed Critical Western Electric Co Inc
Application granted granted Critical
Publication of FR951756A publication Critical patent/FR951756A/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
    • H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
    • H04Q1/453—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling in which m-out-of-n signalling frequencies are transmitted
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q5/00—Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange
    • H04Q5/02—Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange with direct connection for all subscribers, i.e. party-line systems
    • H04Q5/06—Signalling by amplitude or polarity of dc

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
FR951756D 1938-09-24 1947-08-07 Telephone installation Expired FR951756A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US231477A US2206538A (en) 1938-09-24 1938-09-24 Telephone system

Publications (1)

Publication Number Publication Date
FR951756A true FR951756A (en) 1949-11-03

Family

ID=22869388

Family Applications (1)

Application Number Title Priority Date Filing Date
FR951756D Expired FR951756A (en) 1938-09-24 1947-08-07 Telephone installation

Country Status (1)

Country Link
FR (1) FR951756A (en)

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