FR659990A - Device for controlling the degree of transmission in telephone systems, amplifier installations and similar installations - Google Patents

Device for controlling the degree of transmission in telephone systems, amplifier installations and similar installations

Info

Publication number
FR659990A
FR659990A FR659990DA FR659990A FR 659990 A FR659990 A FR 659990A FR 659990D A FR659990D A FR 659990DA FR 659990 A FR659990 A FR 659990A
Authority
FR
France
Prior art keywords
installations
degree
controlling
transmission
telephone systems
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
Wilhelm Hahn
Hans Warncke
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 FR659990A publication Critical patent/FR659990A/en
Expired legal-status Critical Current

Links

Classifications

    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)
FR659990D 1928-09-06 1928-09-05 Device for controlling the degree of transmission in telephone systems, amplifier installations and similar installations Expired FR659990A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2560228A GB322517A (en) 1928-09-06 1928-09-06 Device for the control of the measure of transmission in telephone systems, amplifying systems or the like

Publications (1)

Publication Number Publication Date
FR659990A true FR659990A (en) 1929-07-09

Family

ID=10230343

Family Applications (1)

Application Number Title Priority Date Filing Date
FR659990D Expired FR659990A (en) 1928-09-06 1928-09-05 Device for controlling the degree of transmission in telephone systems, amplifier installations and similar installations

Country Status (2)

Country Link
FR (1) FR659990A (en)
GB (1) GB322517A (en)

Also Published As

Publication number Publication date
GB322517A (en) 1929-12-06

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