BE505114A - - Google Patents

Info

Publication number
BE505114A
BE505114A BE505114DA BE505114A BE 505114 A BE505114 A BE 505114A BE 505114D A BE505114D A BE 505114DA BE 505114 A BE505114 A BE 505114A
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 BE505114A publication Critical patent/BE505114A/xx

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic
    • H04M9/087—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic using different frequency bands for transmitting and receiving paths ; using phase shifting arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other
    • H04B3/21—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a set of bandfilters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J1/00—Frequency-division multiplex systems
    • H04J1/02—Details
    • H04J1/08—Arrangements for combining channels

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
BE505114D 1950-08-12 BE505114A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1023285T 1950-08-12

Publications (1)

Publication Number Publication Date
BE505114A true BE505114A (en)

Family

ID=9578195

Family Applications (1)

Application Number Title Priority Date Filing Date
BE505114D BE505114A (en) 1950-08-12

Country Status (2)

Country Link
BE (1) BE505114A (en)
FR (1) FR1023285A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0235765A1 (en) * 1986-03-03 1987-09-09 Head Stereo GmbH, Kopfbezogene Aufnahme- und Wiedergabetechnik & Co. Messtechnik KG Device for improving the side-tone attenuation or the loop amplification in duplex telephone intercommunication devices

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2156185A (en) * 1984-03-21 1985-10-02 Philips Electronic Associated Loudspeaking telephone instrument
GB2156184A (en) * 1984-03-21 1985-10-02 Philips Electronic Associated Loudspeaking telephone instrument

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0235765A1 (en) * 1986-03-03 1987-09-09 Head Stereo GmbH, Kopfbezogene Aufnahme- und Wiedergabetechnik & Co. Messtechnik KG Device for improving the side-tone attenuation or the loop amplification in duplex telephone intercommunication devices
WO1987005456A1 (en) * 1986-03-03 1987-09-11 Head Stereo Gmbh Kopfbezogene Aufnahme- Und Wieder Device for improving the side-tone attenuation or loop amplification in interphone systems

Also Published As

Publication number Publication date
FR1023285A (en) 1953-03-16

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