BE479847A - - Google Patents

Info

Publication number
BE479847A
BE479847A BE479847DA BE479847A BE 479847 A BE479847 A BE 479847A BE 479847D A BE479847D A BE 479847DA BE 479847 A BE479847 A BE 479847A
Authority
BE
Belgium
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 BE479847A publication Critical patent/BE479847A/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)
  • Devices For Supply Of Signal Current (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
  • Interface Circuits In Exchanges (AREA)
BE479847D 1945-06-15 BE479847A (en:Method)

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
BE479847A true BE479847A (en:Method)

Family

ID=24400029

Family Applications (1)

Application Number Title Priority Date Filing Date
BE479847D BE479847A (en:Method) 1945-06-15

Country Status (6)

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

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 (en:Method) 1950-03-29
GB640108A (en) 1950-07-12
NL78127C (en:Method)
CH281613A (de) 1952-03-15

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