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 (xx)

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 (xx)

Family

ID=25159263

Family Applications (1)

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

Country Status (5)

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

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE510745A (xx) * 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
DE1069214B (de) * 1955-09-17 1959-11-19 Antoi., zugl Schaltungsanordnung ziuim Regeln des Speisestroms für zentrallgespeiste Anschlußstellen in Fernmeldeanlagen
DE1002399B (de) * 1955-12-30 1957-02-14 Siemens Ag Schaltungsanordnung zur selbsttaetigen Regelung der Rueckhoerdaempfung von Fernsprechstationen
NL100978C (xx) * 1956-03-29
US3020351A (en) * 1957-03-20 1962-02-06 Gen Dynamics Corp Directional coupling network
NL269763A (xx) * 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
US2287998A (en) * 1939-06-10 1942-06-30 Bell Telephone Labor Inc Telephone circuit
US2288049A (en) * 1939-06-10 1942-06-30 Bell Telephone Labor Inc Telephone set 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
BE468046A (xx) * 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 (xx) * 1947-11-04

Also Published As

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

Similar Documents

Publication Publication Date Title
AT165657B (xx)
FR956416A (xx)
AT165716B (xx)
AT166672B (xx)
AT165884B (xx)
AT165673B (xx)
BE474505A (xx)
BE472149A (xx)
BE342691A (xx)
BE484190A (xx)
BE470671A (xx)
BE473400A (xx)
NL80817C (xx)
BE473401A (xx)
BE483204A (xx)
BE470729A (xx)
BE473418A (xx)
NL78888C (xx)
NL65820C (xx)
BE467279A (xx)
BE463900A (xx)
BE458425A (xx)
BE422748A (xx)
BE401708A (xx)
BE471627A (xx)