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AU2001274791A1 - Method of generating a ring signal in a subscriber line interface circuit - Google Patents

Method of generating a ring signal in a subscriber line interface circuit

Info

Publication number
AU2001274791A1
AU2001274791A1 AU2001274791A AU7479101A AU2001274791A1 AU 2001274791 A1 AU2001274791 A1 AU 2001274791A1 AU 2001274791 A AU2001274791 A AU 2001274791A AU 7479101 A AU7479101 A AU 7479101A AU 2001274791 A1 AU2001274791 A1 AU 2001274791A1
Authority
AU
Australia
Prior art keywords
ring signal
voltage
interface circuit
line interface
subscriber line
Prior art date
Legal status (The legal status 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 status listed.)
Abandoned
Application number
AU2001274791A
Inventor
Anders Emericks
Henrik Hellberg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Publication of AU2001274791A1 publication Critical patent/AU2001274791A1/en
Abandoned legal-status Critical Current

Links

Classifications

    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/02—Calling substations, e.g. by ringing
    • H04M3/06—Calling substations, e.g. by ringing the calling signal being supplied from the subscriber's line circuit
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/22—Arrangements for supervision, monitoring or testing
    • H04M3/26—Arrangements for supervision, monitoring or testing with means for applying test signals or for measuring
    • H04M3/28—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor
    • H04M3/30—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor for subscriber's lines, for the local loop
    • H04M3/305—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor for subscriber's lines, for the local loop testing of physical copper line parameters, e.g. capacitance or resistance

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Amplifiers (AREA)
  • Interface Circuits In Exchanges (AREA)

Abstract

In a method and a device for controlling the magnitude of the generated ring signal in a the Subscriber Line Interface Circuit (SLIC) the voltage of the A and B lines to the subscriber from the SLIC is compared to a reference voltage. The device is arranged to control the magnitude of the generated ring signal voltage in response to the outcome of the comparison. In particular, the device is arranged to control the ring signal voltage so that the ring signal voltage is reduced if the voltage on the A or B line exceeds the reference voltage. Also, the reference voltage is preferably chosen so that there is no risk for saturation of the final stages. The reference voltage is preferably selected to have a value being related to the value of the negative supply voltage.
AU2001274791A 2000-06-21 2001-06-21 Method of generating a ring signal in a subscriber line interface circuit Abandoned AU2001274791A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE0002350A SE0002350L (en) 2000-06-21 2000-06-21 A method of generating a ring signal in a subscriber line circuit
SE0002350 2000-06-21
PCT/SE2001/001446 WO2001099394A1 (en) 2000-06-21 2001-06-21 Method of generating a ring signal in a subscriber line interface circuit

Publications (1)

Publication Number Publication Date
AU2001274791A1 true AU2001274791A1 (en) 2002-01-02

Family

ID=20280205

Family Applications (1)

Application Number Title Priority Date Filing Date
AU2001274791A Abandoned AU2001274791A1 (en) 2000-06-21 2001-06-21 Method of generating a ring signal in a subscriber line interface circuit

Country Status (8)

Country Link
US (1) US6973181B2 (en)
EP (1) EP1303972B1 (en)
AT (1) ATE355698T1 (en)
AU (1) AU2001274791A1 (en)
DE (1) DE60126949T2 (en)
SE (1) SE0002350L (en)
TW (1) TW524007B (en)
WO (1) WO2001099394A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0322894D0 (en) * 2003-09-30 2003-10-29 British Telecomm Telephony system

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5511118A (en) * 1991-01-31 1996-04-23 Northern Telecom Limited Method of providing d.c. feed to a telephone line
US5392349A (en) * 1992-05-18 1995-02-21 At&T Corp. Overvoltage protection scheme for subscriber loops and method of performing same
SE9400186D0 (en) * 1994-01-21 1994-01-21 Ericsson Telefon Ab L M Procedure in a telecommunications system
US5691658A (en) * 1994-05-24 1997-11-25 Imp, Inc. Current mode amplifier, rectifier and multi-function circuit
JPH0851652A (en) 1994-06-29 1996-02-20 Harris Corp Telephone system circuit,impedance setting circuit, subscriber's line interface circuit,and ground key sensor
US5649009A (en) * 1994-11-14 1997-07-15 Harris Corporation Differential longitudinal amplifier for a subscriber line interface circuit
SE509626C2 (en) * 1997-06-06 1999-02-15 Ericsson Telefon Ab L M A method for controlling the signal space in a subscriber line circuit as well as the subscriber line circuit
FI104934B (en) * 1997-11-18 2000-04-28 Nokia Networks Oy SLIC
US6233335B1 (en) * 1998-05-15 2001-05-15 Intersil Corporation Battery switching subscriber loop interface circuit
US6665398B1 (en) * 1998-09-01 2003-12-16 Christopher Ludeman Programmable subscriber loop interface circuit and method
DE59812453D1 (en) * 1998-10-29 2005-02-03 Infineon Technologies Ag Circuit arrangement for feeding a telephone subscriber loop with a supply voltage
DE69927927D1 (en) * 1998-12-31 2005-12-01 St Microelectronics Srl Monolithically integrated subscriber circuit arrangement for driving a broadband line for data transmission
US6570984B1 (en) * 1999-04-20 2003-05-27 Eci Telecom Ltd. Ring trip detection circuit and method for subscriber line interface
US6735302B1 (en) * 1999-05-28 2004-05-11 Broadcom Corporation DSP based SLIC architecture with current-sensing voltage synthesis impedance matching and DC feed control

Also Published As

Publication number Publication date
EP1303972A1 (en) 2003-04-23
US6973181B2 (en) 2005-12-06
DE60126949D1 (en) 2007-04-12
ATE355698T1 (en) 2006-03-15
WO2001099394A1 (en) 2001-12-27
SE0002350D0 (en) 2000-06-21
US20030133564A1 (en) 2003-07-17
TW524007B (en) 2003-03-11
SE0002350L (en) 2001-12-22
WO2001099394A8 (en) 2002-02-28
EP1303972B1 (en) 2007-02-28
DE60126949T2 (en) 2007-11-15

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