BE506490A - - Google Patents

Info

Publication number
BE506490A
BE506490A BE506490DA BE506490A BE 506490 A BE506490 A BE 506490A BE 506490D A BE506490D A BE 506490DA BE 506490 A BE506490 A BE 506490A
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 BE506490A publication Critical patent/BE506490A/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
    • H04Q1/442—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies
    • H04Q1/4423—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies using one signalling frequency

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Amplifiers (AREA)
  • Devices For Supply Of Signal Current (AREA)
BE506490D 1951-01-16 BE506490A (ja)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US206275A US2680784A (en) 1951-01-16 1951-01-16 Ringing current repeater

Publications (1)

Publication Number Publication Date
BE506490A true BE506490A (ja)

Family

ID=22765678

Family Applications (1)

Application Number Title Priority Date Filing Date
BE506490D BE506490A (ja) 1951-01-16

Country Status (3)

Country Link
US (1) US2680784A (ja)
BE (1) BE506490A (ja)
GB (1) GB719139A (ja)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL287044A (ja) * 1961-12-21

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1699774A (en) * 1926-12-09 1929-01-22 Reserve Holding Co Ringing-current repeater
US1953487A (en) * 1931-11-17 1934-04-03 Bell Telephone Labor Inc Transmission control circuits
US2004759A (en) * 1934-07-12 1935-06-11 Alfred T Jester Ringing repeater
NL46063C (ja) * 1934-12-29
FR959681A (ja) * 1941-03-29 1950-03-31
US2452239A (en) * 1946-04-15 1948-10-26 Lorain Prod Corp Telephone circuit

Also Published As

Publication number Publication date
US2680784A (en) 1954-06-08
GB719139A (en) 1954-11-24

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