FR707536A - Inter-communication telephone system - Google Patents

Inter-communication telephone system

Info

Publication number
FR707536A
FR707536A FR707536DA FR707536A FR 707536 A FR707536 A FR 707536A FR 707536D A FR707536D A FR 707536DA FR 707536 A FR707536 A FR 707536A
Authority
FR
France
Prior art keywords
inter
telephone system
communication telephone
communication
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.)
Societe des Telephones Ericsson SA
Original Assignee
Societe des Telephones Ericsson SA
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 Societe des Telephones Ericsson SA filed Critical Societe des Telephones Ericsson SA
Application granted granted Critical
Publication of FR707536A publication Critical patent/FR707536A/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
    • H04M3/62—Keyboard equipment

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
FR707536D 1930-03-15 1930-03-15 Inter-communication telephone system Expired FR707536A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR707536T 1930-03-15

Publications (1)

Publication Number Publication Date
FR707536A true FR707536A (en) 1931-07-09

Family

ID=9068399

Family Applications (1)

Application Number Title Priority Date Filing Date
FR707536D Expired FR707536A (en) 1930-03-15 1930-03-15 Inter-communication telephone system

Country Status (1)

Country Link
FR (1) FR707536A (en)

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