DE255386C - - Google Patents

Info

Publication number
DE255386C
DE255386C DENDAT255386D DE255386DA DE255386C DE 255386 C DE255386 C DE 255386C DE NDAT255386 D DENDAT255386 D DE NDAT255386D DE 255386D A DE255386D A DE 255386DA DE 255386 C DE255386 C DE 255386C
Authority
DE
Germany
Prior art keywords
relay
circuit
ringing current
subscriber
contact
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
DENDAT255386D
Other languages
German (de)
English (en)
Publication of DE255386C publication Critical patent/DE255386C/de
Active legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/60—Semi-automatic systems, i.e. in which the numerical selection of the outgoing line is under the control of an operator
    • H04M3/62—Keyboard equipment

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
DENDAT255386D Active DE255386C (enrdf_load_stackoverflow)

Publications (1)

Publication Number Publication Date
DE255386C true DE255386C (enrdf_load_stackoverflow)

Family

ID=513495

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT255386D Active DE255386C (enrdf_load_stackoverflow)

Country Status (1)

Country Link
DE (1) DE255386C (enrdf_load_stackoverflow)

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