WO1999027703A3 - Subscriber line interface circuit - Google Patents

Subscriber line interface circuit Download PDF

Info

Publication number
WO1999027703A3
WO1999027703A3 PCT/FI1998/000900 FI9800900W WO9927703A3 WO 1999027703 A3 WO1999027703 A3 WO 1999027703A3 FI 9800900 W FI9800900 W FI 9800900W WO 9927703 A3 WO9927703 A3 WO 9927703A3
Authority
WO
WIPO (PCT)
Prior art keywords
subscriber line
voltage
amplifier
output voltages
interface circuit
Prior art date
Application number
PCT/FI1998/000900
Other languages
English (en)
French (fr)
Other versions
WO1999027703A2 (fi
Inventor
Caj Nordstroem
Original Assignee
Nokia Telecommunications Oy
Caj Nordstroem
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 Nokia Telecommunications Oy, Caj Nordstroem filed Critical Nokia Telecommunications Oy
Priority to AU12378/99A priority Critical patent/AU1237899A/en
Publication of WO1999027703A2 publication Critical patent/WO1999027703A2/fi
Publication of WO1999027703A3 publication Critical patent/WO1999027703A3/fi

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
    • H04M19/005—Feeding arrangements without the use of line transformers
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Interface Circuits In Exchanges (AREA)
PCT/FI1998/000900 1997-11-18 1998-11-17 Subscriber line interface circuit WO1999027703A2 (fi)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU12378/99A AU1237899A (en) 1997-11-18 1998-11-17 Subscriber line interface circuit

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI974272 1997-11-18
FI974272A FI104934B (fi) 1997-11-18 1997-11-18 Tilaajajohtoliitäntäpiiri

Publications (2)

Publication Number Publication Date
WO1999027703A2 WO1999027703A2 (fi) 1999-06-03
WO1999027703A3 true WO1999027703A3 (fi) 1999-08-26

Family

ID=8549974

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI1998/000900 WO1999027703A2 (fi) 1997-11-18 1998-11-17 Subscriber line interface circuit

Country Status (3)

Country Link
AU (1) AU1237899A (fi)
FI (1) FI104934B (fi)
WO (1) WO1999027703A2 (fi)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE0002350L (sv) * 2000-06-21 2001-12-22 Ericsson Telefon Ab L M En metod att generera en ringsignal i en abonnentlinjekrets
DE10140357C2 (de) 2001-08-17 2003-07-24 Infineon Technologies Ag Telefonsystem mit regelbarer Klingelspannung
DE10240815B4 (de) * 2002-08-30 2006-02-23 Infineon Technologies Ag Verfahren zum Einstellen eines Rufsignalstroms in einer Teilnehmerleitung und Schaltungsanordnung
DE10240810B3 (de) 2002-08-30 2004-04-08 Infineon Technologies Ag Verfahren und Schaltungsanordnung zum Steuern einer Teilnehmerleitungs-Schnittstellenschaltung

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US4431868A (en) * 1981-07-09 1984-02-14 International Telephone And Telegraph Corporation Solid state telephone line interface circuit with ringing capability
GB2193063A (en) * 1986-07-08 1988-01-27 Toshiba Kk Line circuits
US4853959A (en) * 1986-06-27 1989-08-01 Telefonaktiebolaget L M Ericsson Method and apparatus for feeding power to a telephone line such that for restricted battery voltage there is enabled the transmission of an undistorted speech signal
WO1996015617A1 (en) * 1994-11-10 1996-05-23 Telefonaktiebolaget Lm Ericsson (Publ) Supply voltage switching apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US4431868A (en) * 1981-07-09 1984-02-14 International Telephone And Telegraph Corporation Solid state telephone line interface circuit with ringing capability
US4853959A (en) * 1986-06-27 1989-08-01 Telefonaktiebolaget L M Ericsson Method and apparatus for feeding power to a telephone line such that for restricted battery voltage there is enabled the transmission of an undistorted speech signal
GB2193063A (en) * 1986-07-08 1988-01-27 Toshiba Kk Line circuits
WO1996015617A1 (en) * 1994-11-10 1996-05-23 Telefonaktiebolaget Lm Ericsson (Publ) Supply voltage switching apparatus

Also Published As

Publication number Publication date
FI104934B (fi) 2000-04-28
FI974272A (fi) 1999-05-19
WO1999027703A2 (fi) 1999-06-03
FI974272A0 (fi) 1997-11-18
AU1237899A (en) 1999-06-15

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