NL36982C - - Google Patents

Info

Publication number
NL36982C
NL36982C NL36982DA NL36982C NL 36982 C NL36982 C NL 36982C NL 36982D A NL36982D A NL 36982DA NL 36982 C NL36982 C NL 36982C
Authority
NL
Netherlands
Application number
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.)
Publication of NL36982C publication Critical patent/NL36982C/xx

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
NL36982D 1931-08-20 NL36982C (enrdf_load_stackoverflow)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1931S0100497 DE690711C (de) 1931-08-20 1931-08-20 Schaltungsanordnung fuer Fernsprechanlagen, in denen zur Signalgabe Wechselstroeme bestimmter Frequenzen innerhalb des Sprachfrequenzbereiches benutzt werden

Publications (1)

Publication Number Publication Date
NL36982C true NL36982C (enrdf_load_stackoverflow)

Family

ID=7523110

Family Applications (1)

Application Number Title Priority Date Filing Date
NL36982D NL36982C (enrdf_load_stackoverflow) 1931-08-20

Country Status (2)

Country Link
DE (1) DE690711C (enrdf_load_stackoverflow)
NL (1) NL36982C (enrdf_load_stackoverflow)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE960737C (de) * 1951-02-24 1957-04-18 Siemens Ag Schaltungsanordnung fuer Fernsprechanlagen, in denen zur Signalgabe Wechselstroeme innerhalb des Sprachbandes benutzt werden
DE1001709B (de) * 1953-02-24 1957-01-31 Int Standard Electric Corp Tonfrequenzsignalempfaenger fuer zwei Frequenzen

Also Published As

Publication number Publication date
DE690711C (de) 1940-05-04

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