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FI974270A7 - Subscriber line connection circuit - Google Patents

Subscriber line connection circuit

Info

Publication number
FI974270A7
FI974270A7 FI974270A FI974270A FI974270A7 FI 974270 A7 FI974270 A7 FI 974270A7 FI 974270 A FI974270 A FI 974270A FI 974270 A FI974270 A FI 974270A FI 974270 A7 FI974270 A7 FI 974270A7
Authority
FI
Finland
Prior art keywords
subscriber line
line connection
connection circuit
circuit
subscriber
Prior art date
Application number
FI974270A
Other languages
Finnish (fi)
Swedish (sv)
Other versions
FI104933B (en
FI974270A0 (en
Inventor
Caj Nordstroem
Harri Hurme
Original Assignee
Nokia Telecommunications Oy
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 filed Critical Nokia Telecommunications Oy
Priority to FI974270A priority Critical patent/FI104933B/en
Publication of FI974270A0 publication Critical patent/FI974270A0/en
Priority to PCT/FI1998/000898 priority patent/WO1999029098A2/en
Priority to AU12376/99A priority patent/AU1237699A/en
Priority to EP98955604A priority patent/EP1025690A2/en
Publication of FI974270A7 publication Critical patent/FI974270A7/en
Application granted granted Critical
Publication of FI104933B publication Critical patent/FI104933B/en

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
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
    • H04M19/023—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone by reversing the polarity of the current at the exchange

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Interface Circuits In Exchanges (AREA)
FI974270A 1997-11-18 1997-11-18 SLIC FI104933B (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
FI974270A FI104933B (en) 1997-11-18 1997-11-18 SLIC
PCT/FI1998/000898 WO1999029098A2 (en) 1997-11-18 1998-11-17 Subscriber line interface circuit
AU12376/99A AU1237699A (en) 1997-11-18 1998-11-17 Subscriber line interface circuit
EP98955604A EP1025690A2 (en) 1997-11-18 1998-11-17 Subscriber line interface circuit

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI974270 1997-11-18
FI974270A FI104933B (en) 1997-11-18 1997-11-18 SLIC

Publications (3)

Publication Number Publication Date
FI974270A0 FI974270A0 (en) 1997-11-18
FI974270A7 true FI974270A7 (en) 1999-05-19
FI104933B FI104933B (en) 2000-04-28

Family

ID=8549972

Family Applications (1)

Application Number Title Priority Date Filing Date
FI974270A FI104933B (en) 1997-11-18 1997-11-18 SLIC

Country Status (4)

Country Link
EP (1) EP1025690A2 (en)
AU (1) AU1237699A (en)
FI (1) FI104933B (en)
WO (1) WO1999029098A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10124965A1 (en) * 2001-05-21 2002-12-12 Infineon Technologies Ag Method for switching a reference voltage potential for surge protective devices

Family Cites Families (6)

* 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
JPS61154347A (en) * 1984-12-27 1986-07-14 Fujitsu Ltd Feeding circuit of exchange
SE453626B (en) * 1986-06-27 1988-02-15 Ericsson Telefon Ab L M SET AND DEVICE TO POWER A TELEPHONE LINE TO PUT A LIMITED BATTERY SIGNAL WITH LIMITED BATTERY VOLTAGE
KR880002353A (en) * 1986-07-08 1988-04-30 아오이 죠이찌 Subscriber circuit
SE503646C2 (en) * 1994-11-10 1996-07-22 Ericsson Telefon Ab L M Automatic switching device

Also Published As

Publication number Publication date
FI104933B (en) 2000-04-28
WO1999029098A2 (en) 1999-06-10
FI974270A0 (en) 1997-11-18
WO1999029098A3 (en) 1999-09-02
AU1237699A (en) 1999-06-16
EP1025690A2 (en) 2000-08-09

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