BE464853A - - Google Patents

Info

Publication number
BE464853A
BE464853A BE464853DA BE464853A BE 464853 A BE464853 A BE 464853A BE 464853D A BE464853D A BE 464853DA BE 464853 A BE464853 A BE 464853A
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 BE464853A publication Critical patent/BE464853A/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
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/58—Anti-side-tone circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Amplifiers (AREA)
BE464853D 1939-08-14 BE464853A (en:Method)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US290090A US2282405A (en) 1939-08-14 1939-08-14 Transmission system

Publications (1)

Publication Number Publication Date
BE464853A true BE464853A (en:Method)

Family

ID=23114493

Family Applications (1)

Application Number Title Priority Date Filing Date
BE464853D BE464853A (en:Method) 1939-08-14

Country Status (4)

Country Link
US (3) US2282405A (en:Method)
BE (1) BE464853A (en:Method)
FR (1) FR930594A (en:Method)
GB (1) GB542252A (en:Method)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2428520A (en) * 1943-05-01 1947-10-07 Automatic Elect Lab Transmission system
CH251257A (de) * 1943-11-03 1947-10-15 Autophon Ag Hörerschaltung in Teilnehmereinrichtung einer Wechselsprechanlage.
US2477275A (en) * 1944-01-15 1949-07-26 Firm Autophon Ag Voice-controlled two-way communication system
US2487455A (en) * 1945-01-29 1949-11-08 Stromberg Carlson Co Telephone circuit
US2468553A (en) * 1945-03-17 1949-04-26 Automatic Elect Lab Voice operated control circuit
US2542921A (en) * 1945-07-02 1951-02-20 Automatic Elect Lab Signal operated control for twochannel transmission systems
US2515726A (en) * 1945-09-24 1950-07-18 Automatic Elect Lab Intercommunicating system
US2472211A (en) * 1945-12-13 1949-06-07 Automatic Elect Lab Antisinging gain controlled repeater
US2484691A (en) * 1946-02-14 1949-10-11 Western Electric Co Loud-speaking communication system
BE476344A (en:Method) * 1946-06-20
US2497779A (en) * 1946-10-09 1950-02-14 Northern Electric Co Four-wire transmission circuit thermistor control
US2568397A (en) * 1947-02-20 1951-09-18 Rca Corp Telephone terminal equipment
FR961481A (en:Method) * 1947-02-21 1950-05-12
US2647172A (en) * 1948-06-11 1953-07-28 Le Teleampliphone Soc Electronic switch
GB703801A (en) * 1951-11-19 1954-02-10 Leonard Ernest Ryall Improvements in or relating to voice switching in telephone transmission systems
US3136864A (en) * 1959-10-05 1964-06-09 Automatic Elect Lab Loudspeaking telephone with electronic voice switching

Also Published As

Publication number Publication date
US2282405A (en) 1942-05-12
GB542252A (en) 1942-01-01
US2371291A (en) 1945-03-13
USRE22897E (en) 1947-07-15
FR930594A (fr) 1948-01-29

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