BE478607A - - Google Patents

Info

Publication number
BE478607A
BE478607A BE478607DA BE478607A BE 478607 A BE478607 A BE 478607A BE 478607D A BE478607D A BE 478607DA BE 478607 A BE478607 A BE 478607A
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 BE478607A publication Critical patent/BE478607A/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
    • H04Q1/446—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)
  • Interface Circuits In Exchanges (AREA)
BE478607D 1945-12-20 BE478607A (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR922194T 1945-12-20

Publications (1)

Publication Number Publication Date
BE478607A true BE478607A (it)

Family

ID=9437856

Family Applications (1)

Application Number Title Priority Date Filing Date
BE478607D BE478607A (it) 1945-12-20

Country Status (3)

Country Link
US (1) US2549803A (it)
BE (1) BE478607A (it)
FR (1) FR922194A (it)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3306984A (en) * 1963-12-16 1967-02-28 Bell Telephone Labor Inc Elimination of talk-off in in-band signaling systems

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE347704A (it) * 1927-01-04
US1711651A (en) * 1927-01-29 1929-05-07 Bell Telephone Labor Inc Signaling system
US2020487A (en) * 1934-05-26 1935-11-12 Bell Telephone Labor Inc Electrical signaling
US2099250A (en) * 1936-05-25 1937-11-16 Lee E Adler Telephone signal system
US2145053A (en) * 1936-11-18 1939-01-24 Bell Telephone Labor Inc Signaling system
US2138613A (en) * 1937-05-14 1938-11-29 Bell Telephone Labor Inc Signaling system
US2282131A (en) * 1940-01-12 1942-05-05 Associated Electric Lab Inc Electrical signaling system
US2326457A (en) * 1940-10-10 1943-08-10 Associated Electric Lab Inc Alternating current signaling system
US2310749A (en) * 1942-03-31 1943-02-09 Bell Telephone Labor Inc Singaling system

Also Published As

Publication number Publication date
FR922194A (fr) 1947-06-02
US2549803A (en) 1951-04-24

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