NL225553A - - Google Patents

Info

Publication number
NL225553A
NL225553A NL225553DA NL225553A NL 225553 A NL225553 A NL 225553A NL 225553D A NL225553D A NL 225553DA NL 225553 A NL225553 A NL 225553A
Authority
NL
Netherlands
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 NL225553A publication Critical patent/NL225553A/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)
NL225553D 1957-09-17 NL225553A (en:Method)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
NL225553A true NL225553A (en:Method)

Family

ID=20308921

Family Applications (1)

Application Number Title Priority Date Filing Date
NL225553D NL225553A (en:Method) 1957-09-17

Country Status (7)

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

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL259106A (en:Method) * 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
BE565493A (en:Method)
CH361033A (de) 1962-03-31
GB830818A (en) 1960-03-23
US3027428A (en) 1962-03-27
FR1199271A (fr) 1959-12-11

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