BE469898A - - Google Patents

Info

Publication number
BE469898A
BE469898A BE469898DA BE469898A BE 469898 A BE469898 A BE 469898A BE 469898D A BE469898D A BE 469898DA BE 469898 A BE469898 A BE 469898A
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 BE469898A publication Critical patent/BE469898A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
BE469898D 1944-02-19 BE469898A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3129/44A GB571908A (en) 1944-02-19 1944-02-19 Improvements in or relating to telephone or like systems

Publications (1)

Publication Number Publication Date
BE469898A true BE469898A (fr)

Family

ID=9752463

Family Applications (1)

Application Number Title Priority Date Filing Date
BE469898D BE469898A (fr) 1944-02-19

Country Status (3)

Country Link
US (1) US2475546A (fr)
BE (1) BE469898A (fr)
GB (1) GB571908A (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR954202A (fr) * 1946-10-11 1949-12-21 Automatic Elect Lab Système téléphonique à commutation automatique, notamment pour appels interurbains
US3003040A (en) * 1956-01-25 1961-10-03 Gen Dynamics Corp Modified trunk circuit

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1606199A (en) * 1923-09-18 1926-11-09 Western Electric Co Telephone-exchange system
US1829803A (en) * 1930-08-04 1931-11-03 Bell Telephone Labor Inc Telephone system
US2153654A (en) * 1935-06-15 1939-04-11 Panstwowe Zaklady Tele I Radjo System of tone-signaling and impulsing
GB534866A (en) * 1939-10-16 1941-03-20 Siemens Brothers & Co Ltd Improvements relating to telephone and like signalling systems
GB559016A (en) * 1942-07-28 1944-02-01 Automatic Telephone & Elect Improvements in or relating to telephone or like systems

Also Published As

Publication number Publication date
US2475546A (en) 1949-07-05
GB571908A (en) 1945-09-13

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