DE280833C - - Google Patents

Info

Publication number
DE280833C
DE280833C DENDAT280833D DE280833DA DE280833C DE 280833 C DE280833 C DE 280833C DE NDAT280833 D DENDAT280833 D DE NDAT280833D DE 280833D A DE280833D A DE 280833DA DE 280833 C DE280833 C DE 280833C
Authority
DE
Germany
Prior art keywords
private
keys
postal
call
switch
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
DENDAT280833D
Other languages
German (de)
English (en)
Publication of DE280833C publication Critical patent/DE280833C/de
Active legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M3/00Automatic or semi-automatic exchanges
    • H04M3/42Systems providing special services or facilities to subscribers
    • H04M3/58Arrangements for transferring received calls from one subscriber to another; Arrangements affording interim conversations between either the calling or the called party and a third party

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephonic Communication Services (AREA)
DENDAT280833D Active DE280833C (ja�@�@)

Publications (1)

Publication Number Publication Date
DE280833C true DE280833C (ja�@�@)

Family

ID=536621

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT280833D Active DE280833C (ja�@�@)

Country Status (1)

Country Link
DE (1) DE280833C (ja�@�@)

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