BE476047A - - Google Patents

Info

Publication number
BE476047A
BE476047A BE476047DA BE476047A BE 476047 A BE476047 A BE 476047A BE 476047D A BE476047D A BE 476047DA BE 476047 A BE476047 A BE 476047A
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 BE476047A publication Critical patent/BE476047A/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
    • H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
    • H04Q1/453—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling in which m-out-of-n signalling frequencies are transmitted
    • H04Q1/4535—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling in which m-out-of-n signalling frequencies are transmitted with an additional signal transmitted for voice protection

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Telephonic Communication Services (AREA)
BE476047D 1939-08-16 BE476047A (xx)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB268998X 1939-08-16

Publications (1)

Publication Number Publication Date
BE476047A true BE476047A (xx)

Family

ID=10250964

Family Applications (1)

Application Number Title Priority Date Filing Date
BE476047D BE476047A (xx) 1939-08-16

Country Status (5)

Country Link
US (1) US2593512A (xx)
BE (1) BE476047A (xx)
CH (1) CH268998A (xx)
FR (1) FR947898A (xx)
GB (1) GB534023A (xx)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1575272A (en) * 1923-10-31 1926-03-02 Western Electric Co Telephone system
US2188461A (en) * 1935-06-11 1940-01-30 Ass Telephone & Telegraph Co Mechanical impulse repeater
GB489755A (en) * 1937-01-25 1938-07-25 Standard Telephones Cables Ltd Improvements in or relating to electric signalling systems

Also Published As

Publication number Publication date
GB534023A (en) 1941-02-26
US2593512A (en) 1952-04-22
FR947898A (fr) 1949-07-15
CH268998A (de) 1950-06-15

Similar Documents

Publication Publication Date Title
FR961528A (xx)
FR850243A (xx)
BE434647A (xx)
BE433383A (xx)
BE435474A (xx)
BE435413A (xx)
BE435335A (xx)
BE435213A (xx)
BE434846A (xx)
BE434714A (xx)
BE476047A (xx)
BE434662A (xx)
BE435911A (xx)
BE434556A (xx)
BE434526A (xx)
BE434444A (xx)
BE435823A (xx)
BE434030A (xx)
BE433998A (xx)
BE433994A (xx)
NL58884C (xx)
NL56908C (xx)
BE435664A (xx)
BE435654A (xx)
BE434375A (xx)