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BE600001A - Improvements to inter-communication systems - Google Patents

Improvements to inter-communication systems

Info

Publication number
BE600001A
BE600001A BE600001A BE600001A BE600001A BE 600001 A BE600001 A BE 600001A BE 600001 A BE600001 A BE 600001A BE 600001 A BE600001 A BE 600001A BE 600001 A BE600001 A BE 600001A
Authority
BE
Belgium
Prior art keywords
inter
communication systems
systems
communication
Prior art date
Application number
BE600001A
Other languages
French (fr)
Original Assignee
Standard Telephon & Telegraph
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 Standard Telephon & Telegraph filed Critical Standard Telephon & Telegraph
Publication of BE600001A publication Critical patent/BE600001A/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
    • H04M19/04—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/04—Arrangements for interconnection not involving centralised switching involving a separate line for each pair of parties

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
BE600001A 1960-02-10 1961-02-09 Improvements to inter-communication systems BE600001A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT102860A AT233634B (en) 1960-02-10 1960-02-10 Circuit arrangement for an intercom

Publications (1)

Publication Number Publication Date
BE600001A true BE600001A (en) 1961-05-29

Family

ID=3505113

Family Applications (1)

Application Number Title Priority Date Filing Date
BE600001A BE600001A (en) 1960-02-10 1961-02-09 Improvements to inter-communication systems

Country Status (5)

Country Link
AT (1) AT233634B (en)
BE (1) BE600001A (en)
CH (1) CH388390A (en)
DE (1) DE1164503B (en)
FR (1) FR1288163A (en)

Also Published As

Publication number Publication date
CH388390A (en) 1965-02-28
FR1288163A (en) 1962-02-12
AT233634B (en) 1964-05-25
DE1164503B (en) 1964-03-05

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