AU2443399A - Method and apparatus for detecting signalling tones - Google Patents

Method and apparatus for detecting signalling tones

Info

Publication number
AU2443399A
AU2443399A AU24433/99A AU2443399A AU2443399A AU 2443399 A AU2443399 A AU 2443399A AU 24433/99 A AU24433/99 A AU 24433/99A AU 2443399 A AU2443399 A AU 2443399A AU 2443399 A AU2443399 A AU 2443399A
Authority
AU
Australia
Prior art keywords
signalling tones
detecting signalling
detecting
tones
signalling
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
AU24433/99A
Inventor
Michael Leong
Yuri Zakharov
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.)
Nortel Networks Ltd
Original Assignee
Northern Telecom Ltd
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 Northern Telecom Ltd filed Critical Northern Telecom Ltd
Publication of AU2443399A publication Critical patent/AU2443399A/en
Abandoned legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M1/00Substation equipment, e.g. for use by subscribers
    • H04M1/82Line monitoring circuits for call progress or status discrimination

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephone Function (AREA)
  • Telephonic Communication Services (AREA)
AU24433/99A 1998-10-30 1998-10-30 Method and apparatus for detecting signalling tones Abandoned AU2443399A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/RU1998/000353 WO2000030325A1 (en) 1998-10-30 1998-10-30 Method and apparatus for detecting signalling tones

Publications (1)

Publication Number Publication Date
AU2443399A true AU2443399A (en) 2000-06-05

Family

ID=20130281

Family Applications (1)

Application Number Title Priority Date Filing Date
AU24433/99A Abandoned AU2443399A (en) 1998-10-30 1998-10-30 Method and apparatus for detecting signalling tones

Country Status (2)

Country Link
AU (1) AU2443399A (en)
WO (1) WO2000030325A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7215765B2 (en) 2002-06-24 2007-05-08 Freescale Semiconductor, Inc. Method and apparatus for pure delay estimation in a communication system
US7242762B2 (en) 2002-06-24 2007-07-10 Freescale Semiconductor, Inc. Monitoring and control of an adaptive filter in a communication system
US6961423B2 (en) 2002-06-24 2005-11-01 Freescale Semiconductor, Inc. Method and apparatus for performing adaptive filtering
US7388954B2 (en) 2002-06-24 2008-06-17 Freescale Semiconductor, Inc. Method and apparatus for tone indication
EP1395065B1 (en) 2002-08-28 2007-01-24 Freescale Semiconductor, Inc. Tone detector and method therefor
US7844048B2 (en) 2004-03-08 2010-11-30 Freescale Semiconductor, Inc. Selective tone event detector and method therefor
US9503568B1 (en) 2016-06-30 2016-11-22 Captioncall, Llc Detecting dial tone on a telephone line

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5023906A (en) * 1990-04-24 1991-06-11 The Telephone Connection Method for monitoring telephone call progress
US5442696A (en) * 1991-12-31 1995-08-15 At&T Corp. Method and apparatus for detecting control signals
US5321745A (en) * 1992-05-26 1994-06-14 Vmx, Inc. Adaptive efficient single/dual tone decoder apparatus and method for identifying call-progression signals
US5477465A (en) * 1993-08-31 1995-12-19 Talx Corporation Multi-frequency receiver with arbitrary center frequencies

Also Published As

Publication number Publication date
WO2000030325A1 (en) 2000-05-25

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Legal Events

Date Code Title Description
MK6 Application lapsed section 142(2)(f)/reg. 8.3(3) - pct applic. not entering national phase