BE485032A - - Google Patents

Info

Publication number
BE485032A
BE485032A BE485032DA BE485032A BE 485032 A BE485032 A BE 485032A BE 485032D A BE485032D A BE 485032DA BE 485032 A BE485032 A BE 485032A
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 BE485032A publication Critical patent/BE485032A/xx

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/738—Interface circuits for coupling substations to external telephone lines
    • H04M1/76—Compensating for differences in line impedance
    • 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)
  • Emergency Protection Circuit Devices (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
BE485032D 1947-12-22 BE485032A (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US793170A US2620402A (en) 1947-12-22 1947-12-22 Telephone substation circuit with automatic compensation for length of line

Publications (1)

Publication Number Publication Date
BE485032A true BE485032A (de)

Family

ID=25159263

Family Applications (1)

Application Number Title Priority Date Filing Date
BE485032D BE485032A (de) 1947-12-22

Country Status (5)

Country Link
US (2) US2620402A (de)
BE (1) BE485032A (de)
CH (1) CH276285A (de)
FR (1) FR970278A (de)
GB (1) GB661037A (de)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE510745A (de) * 1951-04-18
DE1060915B (de) * 1953-12-21 1959-07-09 Deutsche Bundespost Schutzanordnung fuer Kontakte oder kontaktaehnliche Gebilde in Nachrichtenuebertragungsanlagen gegen hohe Spannungs- und Stromstoesse
DE1069213B (de) * 1955-09-17 1959-11-19
DE1002399B (de) * 1955-12-30 1957-02-14 Siemens Ag Schaltungsanordnung zur selbsttaetigen Regelung der Rueckhoerdaempfung von Fernsprechstationen
NL100978C (de) * 1956-03-29
US3020351A (en) * 1957-03-20 1962-02-06 Gen Dynamics Corp Directional coupling network
NL269763A (de) * 1960-09-30
US3210473A (en) * 1962-12-20 1965-10-05 Automatic Elect Lab Trunk circuit pad-control arrangements
US4132863A (en) * 1977-12-20 1979-01-02 Bell Telephone Laboratories, Incorporated Automatic gain and return loss compensating line circuit
US5471527A (en) * 1993-12-02 1995-11-28 Dsc Communications Corporation Voice enhancement system and method

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US901738A (en) * 1905-07-31 1908-10-20 Kellogg Switchboard & Supply Subscriber's telephone-circuit.
US1399775A (en) * 1918-02-01 1921-12-13 Western Electric Co Common-battery substation
US1442427A (en) * 1919-08-06 1923-01-16 Western Electric Co Anti-side-tone substation circuit
US1464118A (en) * 1919-11-28 1923-08-07 Western Electric Co Machine-switching telephone-exchange system
US1555037A (en) * 1921-10-04 1925-09-29 American Telephone & Telegraph Resistance amplifier
GB178860A (en) * 1922-05-03 1923-07-23 Drahtlose Telegraphie Gmbh Improvements in telephone systems
US1641233A (en) * 1923-10-20 1927-09-06 Stromberg Carlson Telephone Telephone system
US1993780A (en) * 1931-02-11 1935-03-12 Bell Telephone Labor Inc Telephone substation equipment
US2164033A (en) * 1938-01-08 1939-06-27 Bell Telephone Labor Inc Telephone system
US2202386A (en) * 1939-02-24 1940-05-28 Bell Telephone Labor Inc Telephone circuit
US2288049A (en) * 1939-06-10 1942-06-30 Bell Telephone Labor Inc Telephone set circuit
US2287998A (en) * 1939-06-10 1942-06-30 Bell Telephone Labor Inc Telephone circuit
US2260296A (en) * 1939-09-29 1941-10-28 Bell Telephone Labor Inc Electrical filter
US2277623A (en) * 1939-10-12 1942-03-24 Bell Telephone Labor Inc Telephone system
US2360233A (en) * 1941-12-10 1944-10-10 Bell Telephone Labor Inc Thermistor as amplifier for low frequency signals
US2431306A (en) * 1942-07-09 1947-11-25 Int Standard Electric Corp Thermionic amplifier
NL64921C (de) * 1942-10-24
US2375791A (en) * 1943-03-09 1945-05-15 Bell Telephone Labor Inc Telephone station circuit
US2548723A (en) * 1945-07-13 1951-04-10 Kellogg Switchboard & Supply Telephone set hook-switch apparatus
BE483204A (de) * 1947-11-04

Also Published As

Publication number Publication date
CH276285A (de) 1951-06-30
FR970278A (fr) 1951-01-02
GB661037A (en) 1951-11-14
US2620402A (en) 1952-12-02
US2732436A (en) 1956-01-24

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