AT670B - Circuit for shared telephone lines to prevent multiple call stations from being connected to the line at the same time. - Google Patents

Circuit for shared telephone lines to prevent multiple call stations from being connected to the line at the same time.

Info

Publication number
AT670B
AT670B AT670DA AT670B AT 670 B AT670 B AT 670B AT 670D A AT670D A AT 670DA AT 670 B AT670 B AT 670B
Authority
AT
Austria
Prior art keywords
circuit
line
same time
telephone lines
prevent multiple
Prior art date
Application number
Other languages
German (de)
Inventor
Julius Henrik West
Original Assignee
Julius Henrik West
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 Julius Henrik West filed Critical Julius Henrik West
Application granted granted Critical
Publication of AT670B publication Critical patent/AT670B/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/68—Circuit arrangements for preventing eavesdropping
    • H04M1/70—Lock-out or secrecy arrangements in party-line systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q5/00—Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange
    • H04Q5/02—Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange with direct connection for all subscribers, i.e. party-line systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Telephone Set Structure (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
AT670D 1898-02-23 1899-04-22 Circuit for shared telephone lines to prevent multiple call stations from being connected to the line at the same time. AT670B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102496T 1898-02-23

Publications (1)

Publication Number Publication Date
AT670B true AT670B (en) 1899-12-11

Family

ID=5649362

Family Applications (1)

Application Number Title Priority Date Filing Date
AT670D AT670B (en) 1898-02-23 1899-04-22 Circuit for shared telephone lines to prevent multiple call stations from being connected to the line at the same time.

Country Status (2)

Country Link
AT (1) AT670B (en)
DE (2) DE102496C (en)

Also Published As

Publication number Publication date
DE94790C (en)
DE102496C (en)

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