FR653613A - Telephone system with main and secondary set - Google Patents

Telephone system with main and secondary set

Info

Publication number
FR653613A
FR653613A FR653613DA FR653613A FR 653613 A FR653613 A FR 653613A FR 653613D A FR653613D A FR 653613DA FR 653613 A FR653613 A FR 653613A
Authority
FR
France
Prior art keywords
main
telephone system
secondary set
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)
Inventor
Ernst Wehren
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 FR653613A publication Critical patent/FR653613A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/08—Current supply arrangements for telephone systems with current supply sources at the substations

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
FR653613D 1927-05-05 1928-04-30 Telephone system with main and secondary set Expired FR653613A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE653613X 1927-05-05

Publications (1)

Publication Number Publication Date
FR653613A true FR653613A (en) 1929-03-23

Family

ID=6581852

Family Applications (1)

Application Number Title Priority Date Filing Date
FR653613D Expired FR653613A (en) 1927-05-05 1928-04-30 Telephone system with main and secondary set

Country Status (1)

Country Link
FR (1) FR653613A (en)

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