DE302681C - - Google Patents

Info

Publication number
DE302681C
DE302681C DENDAT302681D DE302681DA DE302681C DE 302681 C DE302681 C DE 302681C DE NDAT302681 D DENDAT302681 D DE NDAT302681D DE 302681D A DE302681D A DE 302681DA DE 302681 C DE302681 C DE 302681C
Authority
DE
Germany
Prior art keywords
telephone
switched
telephones
combination
switching
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
DENDAT302681D
Other languages
German (de)
English (en)
Publication of DE302681C publication Critical patent/DE302681C/de
Active legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H04M3/56—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
DENDAT302681D Active DE302681C (cg-RX-API-DMAC7.html)

Publications (1)

Publication Number Publication Date
DE302681C true DE302681C (cg-RX-API-DMAC7.html)

Family

ID=556460

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT302681D Active DE302681C (cg-RX-API-DMAC7.html)

Country Status (1)

Country Link
DE (1) DE302681C (cg-RX-API-DMAC7.html)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE975795C (de) * 1953-10-02 1962-09-20 Standard Elek K Lorenz Ag Orts-Batterie-Fernsprecher mit Sprechtaste und Rueckhoerdaempfung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE975795C (de) * 1953-10-02 1962-09-20 Standard Elek K Lorenz Ag Orts-Batterie-Fernsprecher mit Sprechtaste und Rueckhoerdaempfung

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