BE565493A - - Google Patents

Info

Publication number
BE565493A
BE565493A BE565493DA BE565493A BE 565493 A BE565493 A BE 565493A BE 565493D A BE565493D A BE 565493DA BE 565493 A BE565493 A BE 565493A
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 BE565493A publication Critical patent/BE565493A/xx

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/08—Current supply arrangements for telephone systems with current supply sources at the substations
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Interface Circuits In Exchanges (AREA)
BE565493D 1957-09-17 BE565493A (ja)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE361033X 1957-09-17

Publications (1)

Publication Number Publication Date
BE565493A true BE565493A (ja)

Family

ID=20308921

Family Applications (1)

Application Number Title Priority Date Filing Date
BE565493D BE565493A (ja) 1957-09-17

Country Status (7)

Country Link
US (1) US3027428A (ja)
BE (1) BE565493A (ja)
CH (1) CH361033A (ja)
DE (1) DE1102816B (ja)
FR (1) FR1199271A (ja)
GB (1) GB830818A (ja)
NL (1) NL225553A (ja)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL259106A (ja) * 1959-12-18
DE1155171B (de) * 1961-03-25 1963-10-03 Standard Elektrik Lorenz Ag Schaltungsanordnung fuer die Pegelregelung bei Fernsprechstationen mit Sprech- und/oder Hoerverstaerkern
US3531594A (en) * 1968-08-05 1970-09-29 Nathaniel Dickerson Two-wire multiunit intercom system
US3784755A (en) * 1971-09-07 1974-01-08 Bell Canada Northern Electric Long-line telephone circuit
CH654705A5 (de) * 1982-04-27 1986-02-28 Autelca Ag Schaltungsanordnung fuer einen muenzfernsprecher.
US4488006A (en) * 1982-07-01 1984-12-11 At&T Bell Laboratories Apparatus for controlling the application of telephone line power in a telephone set
FR2533097A1 (fr) * 1982-09-13 1984-03-16 Gesi Controleur de ligne telephonique destine a cooperer avec un automate
GB2142509A (en) * 1983-06-28 1985-01-16 Emhart Ind Audio amplifier
FR2557396A1 (fr) * 1983-11-15 1985-06-28 Gesi Alimentation a haute impedance pour circuit electronique alimente par une ligne de telephone
CA1285494C (en) * 1987-07-10 1991-07-02 Newbridge Networks Corporation Paging system

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE678081C (de) * 1932-05-15 1939-07-08 Westinghouse Cooper Hewitt Ges Anordnung zur Aufrechterhaltung der Spannung in Gleichrichterschaltungen
DE683580C (de) * 1936-10-29 1939-11-09 Siemens & Halske Akt Ges Batterielose, netzgespeiste Stromversorgungseinrichtung
DE887222C (de) * 1945-02-01 1953-08-20 Aeg Verfahren zur Stromversorgung fuer Verstaerkereinrichtungen bei Fernsprechstellen
US2785231A (en) * 1954-02-25 1957-03-12 Bell Telephone Labor Inc Telephone set with amplifier
US2801288A (en) * 1956-03-29 1957-07-30 Bell Telephone Labor Inc Equalizing circuit

Also Published As

Publication number Publication date
DE1102816B (de) 1961-03-23
US3027428A (en) 1962-03-27
CH361033A (de) 1962-03-31
NL225553A (ja)
FR1199271A (fr) 1959-12-11
GB830818A (en) 1960-03-23

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