NL78127C - - Google Patents

Info

Publication number
NL78127C
NL78127C NL78127DA NL78127C NL 78127 C NL78127 C NL 78127C NL 78127D A NL78127D A NL 78127DA NL 78127 C NL78127 C NL 78127C
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 NL78127C publication Critical patent/NL78127C/xx

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q1/00Details of selecting apparatus or arrangements
    • H04Q1/18Electrical details
    • H04Q1/30Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/444Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/446Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency
    • H04Q1/4465Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency the same frequency being used for all signalling information, e.g. A.C. nr.9 system

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
NL78127D 1945-06-15 NL78127C (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US599537A US2422700A (en) 1945-06-15 1945-06-15 Reciprocal signaling trunk telephone system

Publications (1)

Publication Number Publication Date
NL78127C true NL78127C (de)

Family

ID=24400029

Family Applications (1)

Application Number Title Priority Date Filing Date
NL78127D NL78127C (de) 1945-06-15

Country Status (6)

Country Link
US (1) US2422700A (de)
BE (1) BE479847A (de)
CH (1) CH281613A (de)
FR (1) FR959395A (de)
GB (1) GB640108A (de)
NL (1) NL78127C (de)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1512907A (en) * 1924-10-28 Assig-nor to western electric com
US1449644A (en) * 1919-12-30 1923-03-27 Western Electric Co Telephone system
US2005836A (en) * 1933-08-29 1935-06-25 American Telephone & Telegraph Signaling system
GB567049A (en) * 1943-07-21 1945-01-25 Automatic Telephone & Elect Improvements in telephone or like signalling systems

Also Published As

Publication number Publication date
US2422700A (en) 1947-06-24
FR959395A (de) 1950-03-29
BE479847A (de)
GB640108A (en) 1950-07-12
CH281613A (de) 1952-03-15

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