BE693127A - - Google Patents

Info

Publication number
BE693127A
BE693127A BE693127DA BE693127A BE 693127 A BE693127 A BE 693127A BE 693127D A BE693127D A BE 693127DA BE 693127 A BE693127 A BE 693127A
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.)
Filing date
Publication date
Application filed filed Critical
Publication of BE693127A publication Critical patent/BE693127A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Devices For Supply Of Signal Current (AREA)
BE693127D 1967-01-25 1967-01-25 BE693127A (el)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE693127 1967-01-25

Publications (1)

Publication Number Publication Date
BE693127A true BE693127A (el) 1967-07-25

Family

ID=3850124

Family Applications (1)

Application Number Title Priority Date Filing Date
BE693127D BE693127A (el) 1967-01-25 1967-01-25

Country Status (4)

Country Link
US (1) US3588373A (el)
BE (1) BE693127A (el)
DE (1) DE1562120A1 (el)
GB (1) GB1161271A (el)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7402574A (nl) * 1974-02-26 1975-08-28 Philips Nv Schakeling voor een toondruktoetskeuzetelefoon- toestel.

Also Published As

Publication number Publication date
GB1161271A (en) 1969-08-13
US3588373A (en) 1971-06-28
DE1562120A1 (de) 1970-03-05

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