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

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • 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
    • H04Q1/446—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency
    • H04Q1/4465—Signalling 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 (ko)

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 (ko)

Family

ID=24400029

Family Applications (1)

Application Number Title Priority Date Filing Date
BE479847D BE479847A (ko) 1945-06-15

Country Status (6)

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

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
GB640108A (en) 1950-07-12
CH281613A (de) 1952-03-15
FR959395A (ko) 1950-03-29
NL78127C (ko)

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