BE509657A - - Google Patents

Info

Publication number
BE509657A
BE509657A BE509657DA BE509657A BE 509657 A BE509657 A BE 509657A BE 509657D A BE509657D A BE 509657DA BE 509657 A BE509657 A BE 509657A
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 BE509657A publication Critical patent/BE509657A/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)
  • Devices For Supply Of Signal Current (AREA)
BE509657D 1951-03-03 BE509657A (id)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IE312453X 1951-03-03

Publications (1)

Publication Number Publication Date
BE509657A true BE509657A (id)

Family

ID=11042216

Family Applications (1)

Application Number Title Priority Date Filing Date
BE509657D BE509657A (id) 1951-03-03

Country Status (7)

Country Link
US (1) US2686228A (id)
BE (1) BE509657A (id)
CH (1) CH312453A (id)
DE (1) DE965823C (id)
FR (1) FR1058881A (id)
GB (1) GB689379A (id)
NL (1) NL167851C (id)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB956356A (en) * 1960-07-21 1964-04-22 Standard Telephones Cables Ltd Improvements in or relating to signalling methods between subscriber's sets and exchage

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1550658A (en) * 1920-12-31 1925-08-25 American Telephone & Telegraph Ringing circuits for multiplex signaling
US1864082A (en) * 1931-09-25 1932-06-21 Bell Telephone Labor Inc Telephone exchange system
US2041114A (en) * 1934-11-14 1936-05-19 Louis F B Carini Electrical discharge tube circuits
DE658606C (de) * 1935-05-01 1938-04-13 Siemens & Halske Akt Ges Schaltungsanlage fuer Fernsprechanlagen mit Waehlerbetrieb
US2191913A (en) * 1939-03-03 1940-02-27 Bell Telephone Labor Inc Telephone system
US2303654A (en) * 1940-07-12 1942-12-01 Honeywell Regulator Co Control apparatus
FR960967A (id) * 1945-02-06 1950-04-28
BE486292A (id) * 1947-02-20

Also Published As

Publication number Publication date
US2686228A (en) 1954-08-10
GB689379A (en) 1953-03-25
CH312453A (de) 1955-12-31
FR1058881A (fr) 1954-03-19
NL167851C (nl)
DE965823C (de) 1957-06-19

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