FR1136041A - Installation téléphonique à intercommunication - Google Patents

Installation téléphonique à intercommunication

Info

Publication number
FR1136041A
FR1136041A FR1136041DA FR1136041A FR 1136041 A FR1136041 A FR 1136041A FR 1136041D A FR1136041D A FR 1136041DA FR 1136041 A FR1136041 A FR 1136041A
Authority
FR
France
Prior art keywords
intercom
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)
Inventor
Ronald Howard
George Pelham Maitlan Cochrane
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 filed Critical
Application granted granted Critical
Publication of FR1136041A publication Critical patent/FR1136041A/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/54—Systems for transmission via power distribution lines
    • H04B3/544—Setting up communications; Call and signalling arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
FR1136041D 1954-09-20 1955-09-20 Installation téléphonique à intercommunication Expired FR1136041A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1136041X 1954-09-20

Publications (1)

Publication Number Publication Date
FR1136041A true FR1136041A (fr) 1957-05-07

Family

ID=10876765

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1136041D Expired FR1136041A (fr) 1954-09-20 1955-09-20 Installation téléphonique à intercommunication

Country Status (1)

Country Link
FR (1) FR1136041A (fr)

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