CH240685A - Subscriber call facility in electro-acoustic transmission systems. - Google Patents

Subscriber call facility in electro-acoustic transmission systems.

Info

Publication number
CH240685A
CH240685A CH240685DA CH240685A CH 240685 A CH240685 A CH 240685A CH 240685D A CH240685D A CH 240685DA CH 240685 A CH240685 A CH 240685A
Authority
CH
Switzerland
Prior art keywords
electro
transmission systems
acoustic transmission
subscriber call
call facility
Prior art date
Application number
Other languages
German (de)
Inventor
Ag Autophon
Original Assignee
Ag Autophon
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 Ag Autophon filed Critical Ag Autophon
Publication of CH240685A publication Critical patent/CH240685A/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/001—Two-way communication systems between a limited number of parties

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
CH240685D 1942-11-06 1942-11-06 Subscriber call facility in electro-acoustic transmission systems. CH240685A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH606805X 1942-11-06

Publications (1)

Publication Number Publication Date
CH240685A true CH240685A (en) 1946-01-15

Family

ID=4523128

Family Applications (1)

Application Number Title Priority Date Filing Date
CH240685D CH240685A (en) 1942-11-06 1942-11-06 Subscriber call facility in electro-acoustic transmission systems.

Country Status (2)

Country Link
CH (1) CH240685A (en)
GB (1) GB606805A (en)

Also Published As

Publication number Publication date
GB606805A (en) 1948-08-20

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