FR1023285A - Perfectionnements apportés aux moyens de liaison téléphoniques - Google Patents

Perfectionnements apportés aux moyens de liaison téléphoniques

Info

Publication number
FR1023285A
FR1023285A FR1023285DA FR1023285A FR 1023285 A FR1023285 A FR 1023285A FR 1023285D A FR1023285D A FR 1023285DA FR 1023285 A FR1023285 A FR 1023285A
Authority
FR
France
Prior art keywords
connection means
telephone connection
telephone
connection
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
English (en)
French (fr)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Caradeau & Cie
Original Assignee
Caradeau & Cie
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 by Caradeau & Cie filed Critical Caradeau & Cie
Application granted granted Critical
Publication of FR1023285A publication Critical patent/FR1023285A/fr
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
    • 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)
FR1023285D 1950-08-12 1950-08-12 Perfectionnements apportés aux moyens de liaison téléphoniques Expired FR1023285A (fr)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
FR1023285A true FR1023285A (fr) 1953-03-16

Family

ID=9578195

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1023285D Expired FR1023285A (fr) 1950-08-12 1950-08-12 Perfectionnements apportés aux moyens de liaison téléphoniques

Country Status (2)

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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0155740A2 (de) * 1984-03-21 1985-09-25 Philips Electronics Uk Limited Lautfernsprechstation
US4748663A (en) * 1984-03-21 1988-05-31 U.S. Philips Corp. Loudspeaking telephone instrument

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0235765A1 (de) * 1986-03-03 1987-09-09 Head Stereo GmbH, Kopfbezogene Aufnahme- und Wiedergabetechnik & Co. Messtechnik KG Einrichtung zur Verbesserung der Rückhördämpfung bzw. Schleifenverstärkung bei Gegensprecheinrichtungen

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0155740A2 (de) * 1984-03-21 1985-09-25 Philips Electronics Uk Limited Lautfernsprechstation
EP0155740A3 (de) * 1984-03-21 1986-07-16 Philips Electronics Uk Limited Lautfernsprechstation
US4748663A (en) * 1984-03-21 1988-05-31 U.S. Philips Corp. Loudspeaking telephone instrument

Also Published As

Publication number Publication date
BE505114A (de)

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