BE905885A - Circuit de ligne de telecommunication - Google Patents

Circuit de ligne de telecommunication

Info

Publication number
BE905885A
BE905885A BE905885A BE905885A BE905885A BE 905885 A BE905885 A BE 905885A BE 905885 A BE905885 A BE 905885A BE 905885 A BE905885 A BE 905885A BE 905885 A BE905885 A BE 905885A
Authority
BE
Belgium
Prior art keywords
line circuit
telecommunication line
telecommunication
circuit
line
Prior art date
Application number
BE905885A
Other languages
English (en)
Inventor
Hollis David Leonard
Reynolds John Lloyd Iii
Original Assignee
Int Standard Electric Corp
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.)
Filing date
Publication date
Application filed by Int Standard Electric Corp filed Critical Int Standard Electric Corp
Publication of BE905885A publication Critical patent/BE905885A/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/001—Current supply source at the exchanger providing current to substations
    • H04M19/008—Using DC/DC converters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
BE905885A 1985-12-10 1986-12-10 Circuit de ligne de telecommunication BE905885A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/807,085 US4761812A (en) 1985-12-10 1985-12-10 Constant power telephone line circuit

Publications (1)

Publication Number Publication Date
BE905885A true BE905885A (fr) 1987-06-10

Family

ID=25195534

Family Applications (1)

Application Number Title Priority Date Filing Date
BE905885A BE905885A (fr) 1985-12-10 1986-12-10 Circuit de ligne de telecommunication

Country Status (4)

Country Link
US (1) US4761812A (fr)
BE (1) BE905885A (fr)
DE (1) DE3640905A1 (fr)
GB (1) GB2183967B (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4907116A (en) * 1988-06-09 1990-03-06 Rca Licensing Corporation Power supply fault protection circuit
FR2651398B1 (fr) * 1989-08-31 1995-08-25 Alcatel Business Systems Agencement d'alimentation pour terminal telephonique et/ou telematique.
DE69120135T2 (de) * 1990-04-04 1997-01-23 Seiscor Tech Inc Schnittstellenschaltung für Teilnehmerleitung, die regulierten Strom liefert
US5103387A (en) * 1991-01-31 1992-04-07 Northern Telecom Limited High voltage converter
US5559683A (en) * 1994-09-30 1996-09-24 Apple Computer, Inc. Flyback switching power supply with bootstrapped gate drive
DE19520940C2 (de) * 1995-06-02 1997-07-17 Siemens Ag Anordnung zur galvanisch getrennten Übertragung von Hilfsenergie (Gleichspannung) und Informationen zu einer elektronischen Einheit
DE10040795C2 (de) * 2000-08-21 2003-01-02 Siemens Ag Überspannungsschutz für eine elektrische Schaltung mit potentialfreier Spannungsversorgung
GB2381322B (en) * 2001-10-24 2005-09-14 Martindale Electric Company Lt Loop impedance meter
CA2434111A1 (fr) * 2003-06-30 2004-12-30 Catena Networks Canada Inc. Systeme et methode d'alimentation et de protection contre les pannes pour equipement de telecommunications eloigne

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2347696C3 (de) * 1973-09-21 1978-12-21 Siemens Ag, 1000 Berlin Und 8000 Muenchen Schaltungsanordnung zum Speisen von Teilnehmeranschlußleitungen in Fernsprechvermittlungsanlagen
GB1583634A (en) * 1977-03-02 1981-01-28 Int Standard Electric Corp Subscriber line/trunk circuit
JPS5926185B2 (ja) * 1979-10-26 1984-06-25 富士通株式会社 電圧垂下制御回路
US4315106A (en) * 1979-11-28 1982-02-09 International Telephone And Telegraph Corporation Apparatus for regulating current supplied to a telephone line signal of the type employed in digital telephone systems
JPS56133987A (en) * 1980-03-21 1981-10-20 Toshiba Electric Equip Corp Power unit
US4301497A (en) * 1980-06-16 1981-11-17 International Business Machines Corporation Flyback converter control with feed forward
US4387273A (en) * 1980-08-25 1983-06-07 International Telephone And Telegraph Corporation Subscriber line interface circuit with impedance synthesizer
US4317963A (en) * 1980-09-22 1982-03-02 International Telephone And Telegraph Corporation Subscriber line interface circuit utilizing impedance synthesizer and shared voltage source for loop current regulation control
US4402039A (en) * 1981-09-03 1983-08-30 Bell Telephone Laboratories, Incorporated Telephone line circuit
US4429186A (en) * 1982-09-30 1984-01-31 Gte Automatic Electric Inc. Floating battery feed circuit for telephone subscriber line interface
US4511763A (en) * 1982-11-01 1985-04-16 Gte Communication Systems Corporation Floating dc current source for a subscriber loop circuit
US4552994A (en) * 1982-12-13 1985-11-12 Gte Lenkurt Incorporated Communication Systems Apparatus for isolating the voice frequency path from the floating battery feed during signalling
US4674119A (en) * 1984-04-10 1987-06-16 Itt Corporation Wide-band high voltage amplifier for telephone exchange subscriber line interface utilizing low voltage control circuitry
US4598173A (en) * 1984-10-15 1986-07-01 Itt Corporation Interface circuit for a subscriber line circuit
US4602130A (en) * 1984-10-15 1986-07-22 Itt Corporation Dual voltage source feed circuit configuration for a telephone line circuit

Also Published As

Publication number Publication date
US4761812A (en) 1988-08-02
DE3640905A1 (de) 1987-06-11
GB2183967A (en) 1987-06-10
GB2183967B (en) 1989-10-11
GB8627954D0 (en) 1986-12-31

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