FR1105792A - Loudspeaker telephone system - Google Patents

Loudspeaker telephone system

Info

Publication number
FR1105792A
FR1105792A FR1105792DA FR1105792A FR 1105792 A FR1105792 A FR 1105792A FR 1105792D A FR1105792D A FR 1105792DA FR 1105792 A FR1105792 A FR 1105792A
Authority
FR
France
Prior art keywords
telephone system
loudspeaker telephone
loudspeaker
telephone
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
Other languages
French (fr)
Inventor
Georges-Frederic Frankhauser
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
Application granted granted Critical
Publication of FR1105792A publication Critical patent/FR1105792A/en
Expired legal-status Critical Current

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
FR1105792D 1954-07-29 1954-07-29 Loudspeaker telephone system Expired FR1105792A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1105792T 1954-07-29

Publications (1)

Publication Number Publication Date
FR1105792A true FR1105792A (en) 1955-12-07

Family

ID=9623625

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1105792D Expired FR1105792A (en) 1954-07-29 1954-07-29 Loudspeaker telephone system

Country Status (1)

Country Link
FR (1) FR1105792A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2536615A1 (en) * 1982-11-18 1984-05-25 Western Electric Co VOICE SWITCHING DEVICE FOR TELEPHONE CONFERENCE SYSTEM

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2536615A1 (en) * 1982-11-18 1984-05-25 Western Electric Co VOICE SWITCHING DEVICE FOR TELEPHONE CONFERENCE SYSTEM

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