DE268258C - - Google Patents

Info

Publication number
DE268258C
DE268258C DENDAT268258D DE268258DA DE268258C DE 268258 C DE268258 C DE 268258C DE NDAT268258 D DENDAT268258 D DE NDAT268258D DE 268258D A DE268258D A DE 268258DA DE 268258 C DE268258 C DE 268258C
Authority
DE
Germany
Prior art keywords
line
telephone
lever
button
busy
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.)
Active
Application number
DENDAT268258D
Other languages
German (de)
English (en)
Publication of DE268258C publication Critical patent/DE268258C/de
Active legal-status Critical Current

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephonic Communication Services (AREA)
DENDAT268258D Active DE268258C (cg-RX-API-DMAC10.html)

Publications (1)

Publication Number Publication Date
DE268258C true DE268258C (cg-RX-API-DMAC10.html)

Family

ID=525245

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT268258D Active DE268258C (cg-RX-API-DMAC10.html)

Country Status (1)

Country Link
DE (1) DE268258C (cg-RX-API-DMAC10.html)

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