FR951757A - Telephone system - Google Patents

Telephone system

Info

Publication number
FR951757A
FR951757A FR951757DA FR951757A FR 951757 A FR951757 A FR 951757A FR 951757D A FR951757D A FR 951757DA FR 951757 A FR951757 A FR 951757A
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
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
Application filed by Western Electric Co Inc filed Critical Western Electric Co Inc
Application granted granted Critical
Publication of FR951757A publication Critical patent/FR951757A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/60—Semi-automatic systems, i.e. in which the numerical selection of the outgoing line is under the control of an operator
    • H04M3/64—Arrangements for signalling the number or class of the calling line to the operator

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
FR951757D 1940-09-20 1947-08-07 Telephone system Expired FR951757A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US951757XA 1940-09-20 1940-09-20

Publications (1)

Publication Number Publication Date
FR951757A true FR951757A (en) 1949-11-03

Family

ID=22250456

Family Applications (1)

Application Number Title Priority Date Filing Date
FR951757D Expired FR951757A (en) 1940-09-20 1947-08-07 Telephone system

Country Status (1)

Country Link
FR (1) FR951757A (en)

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