CA2419215A1 - Method and apparatus for detection of a telephone cpe alerting signal - Google Patents

Method and apparatus for detection of a telephone cpe alerting signal Download PDF

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Publication number
CA2419215A1
CA2419215A1 CA002419215A CA2419215A CA2419215A1 CA 2419215 A1 CA2419215 A1 CA 2419215A1 CA 002419215 A CA002419215 A CA 002419215A CA 2419215 A CA2419215 A CA 2419215A CA 2419215 A1 CA2419215 A1 CA 2419215A1
Authority
CA
Canada
Prior art keywords
telephone
detection
alerting signal
signaling tone
cpe alerting
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.)
Granted
Application number
CA002419215A
Other languages
French (fr)
Other versions
CA2419215C (en
Inventor
Julian Lee
Gary Louie
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.)
VTech Telecommunications Ltd
Original Assignee
VTech Telecommunications 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 VTech Telecommunications Ltd filed Critical VTech Telecommunications Ltd
Publication of CA2419215A1 publication Critical patent/CA2419215A1/en
Application granted granted Critical
Publication of CA2419215C publication Critical patent/CA2419215C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/57—Arrangements for indicating or recording the number of the calling subscriber at the called subscriber's set
    • H04M1/573—Line monitoring circuits for detecting caller identification
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
    • H04M15/04—Recording calls, or communications in printed, perforated or other permanent form
    • H04M15/06—Recording class or number of calling, i.e. A-party or called party, i.e. B-party

Abstract

A method and apparatus for detecting a signaling tone within a communications channel, such as a telephone line, is presented. The energy level of the communications channel signal is measured at the frequency of the signaling tone and at one or more frequencies that are integer divisors of the signaling tone (i.e. at one or more subharmonics). The subharmonic energies are evaluated in determining whether the signaling tone is present. The technique can be implemented using a plurality of resonators and a comparator.
CA002419215A 2002-02-21 2003-02-19 Method and apparatus for detection of a telephone cpe alerting signal Expired - Fee Related CA2419215C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/079,969 2002-02-21
US10/079,969 US6940966B2 (en) 2002-02-21 2002-02-21 Method and apparatus for detection of a telephone CPE alerting signal

Publications (2)

Publication Number Publication Date
CA2419215A1 true CA2419215A1 (en) 2003-08-21
CA2419215C CA2419215C (en) 2007-10-16

Family

ID=22153957

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002419215A Expired - Fee Related CA2419215C (en) 2002-02-21 2003-02-19 Method and apparatus for detection of a telephone cpe alerting signal

Country Status (4)

Country Link
US (1) US6940966B2 (en)
CA (1) CA2419215C (en)
DE (1) DE10308467B4 (en)
GB (1) GB2385742B (en)

Families Citing this family (41)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7146524B2 (en) 2001-08-03 2006-12-05 Isilon Systems, Inc. Systems and methods for providing a distributed file system incorporating a virtual hot spare
US7685126B2 (en) * 2001-08-03 2010-03-23 Isilon Systems, Inc. System and methods for providing a distributed file system utilizing metadata to track information about data stored throughout the system
US20030223560A1 (en) * 2002-05-29 2003-12-04 Stauf Ent., Inc. Caller ID printing device
US7937421B2 (en) * 2002-11-14 2011-05-03 Emc Corporation Systems and methods for restriping files in a distributed file system
US8238350B2 (en) 2004-10-29 2012-08-07 Emc Corporation Message batching with checkpoints systems and methods
US8055711B2 (en) 2004-10-29 2011-11-08 Emc Corporation Non-blocking commit protocol systems and methods
US8051425B2 (en) 2004-10-29 2011-11-01 Emc Corporation Distributed system with asynchronous execution systems and methods
US20070071214A1 (en) * 2005-09-16 2007-03-29 Ching-Hsun Chen Method for detecting a cpe alert signal of a telecommunication system by utilizing an energy ratio
US7797283B2 (en) 2005-10-21 2010-09-14 Isilon Systems, Inc. Systems and methods for maintaining distributed data
US7788303B2 (en) 2005-10-21 2010-08-31 Isilon Systems, Inc. Systems and methods for distributed system scanning
US7551572B2 (en) 2005-10-21 2009-06-23 Isilon Systems, Inc. Systems and methods for providing variable protection
US7386675B2 (en) 2005-10-21 2008-06-10 Isilon Systems, Inc. Systems and methods for using excitement values to predict future access to resources
US7346720B2 (en) * 2005-10-21 2008-03-18 Isilon Systems, Inc. Systems and methods for managing concurrent access requests to a shared resource
US7917474B2 (en) 2005-10-21 2011-03-29 Isilon Systems, Inc. Systems and methods for accessing and updating distributed data
US7848261B2 (en) 2006-02-17 2010-12-07 Isilon Systems, Inc. Systems and methods for providing a quiescing protocol
US7756898B2 (en) 2006-03-31 2010-07-13 Isilon Systems, Inc. Systems and methods for notifying listeners of events
US8539056B2 (en) 2006-08-02 2013-09-17 Emc Corporation Systems and methods for configuring multiple network interfaces
US7680842B2 (en) 2006-08-18 2010-03-16 Isilon Systems, Inc. Systems and methods for a snapshot of data
US7953704B2 (en) 2006-08-18 2011-05-31 Emc Corporation Systems and methods for a snapshot of data
US7680836B2 (en) 2006-08-18 2010-03-16 Isilon Systems, Inc. Systems and methods for a snapshot of data
US7882071B2 (en) 2006-08-18 2011-02-01 Isilon Systems, Inc. Systems and methods for a snapshot of data
US7899800B2 (en) 2006-08-18 2011-03-01 Isilon Systems, Inc. Systems and methods for providing nonlinear journaling
US7590652B2 (en) 2006-08-18 2009-09-15 Isilon Systems, Inc. Systems and methods of reverse lookup
US7676691B2 (en) 2006-08-18 2010-03-09 Isilon Systems, Inc. Systems and methods for providing nonlinear journaling
US7752402B2 (en) 2006-08-18 2010-07-06 Isilon Systems, Inc. Systems and methods for allowing incremental journaling
US7822932B2 (en) 2006-08-18 2010-10-26 Isilon Systems, Inc. Systems and methods for providing nonlinear journaling
US8286029B2 (en) 2006-12-21 2012-10-09 Emc Corporation Systems and methods for managing unavailable storage devices
US7593938B2 (en) 2006-12-22 2009-09-22 Isilon Systems, Inc. Systems and methods of directory entry encodings
US7509448B2 (en) 2007-01-05 2009-03-24 Isilon Systems, Inc. Systems and methods for managing semantic locks
US7779048B2 (en) 2007-04-13 2010-08-17 Isilon Systems, Inc. Systems and methods of providing possible value ranges
US7900015B2 (en) 2007-04-13 2011-03-01 Isilon Systems, Inc. Systems and methods of quota accounting
US8966080B2 (en) 2007-04-13 2015-02-24 Emc Corporation Systems and methods of managing resource utilization on a threaded computer system
US7882068B2 (en) 2007-08-21 2011-02-01 Isilon Systems, Inc. Systems and methods for adaptive copy on write
US7966289B2 (en) 2007-08-21 2011-06-21 Emc Corporation Systems and methods for reading objects in a file system
US7949692B2 (en) 2007-08-21 2011-05-24 Emc Corporation Systems and methods for portals into snapshot data
US7953709B2 (en) 2008-03-27 2011-05-31 Emc Corporation Systems and methods for a read only mode for a portion of a storage system
US7949636B2 (en) 2008-03-27 2011-05-24 Emc Corporation Systems and methods for a read only mode for a portion of a storage system
US7984324B2 (en) 2008-03-27 2011-07-19 Emc Corporation Systems and methods for managing stalled storage devices
US7870345B2 (en) 2008-03-27 2011-01-11 Isilon Systems, Inc. Systems and methods for managing stalled storage devices
US9208797B2 (en) * 2008-04-18 2015-12-08 General Motors Llc Tone detection for signals sent through a vocoder
US11120820B2 (en) * 2018-12-05 2021-09-14 International Business Machines Corporation Detection of signal tone in audio signal

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03132291A (en) * 1989-10-18 1991-06-05 Fujitsu Ltd Pb signal detection system
SE9202065L (en) * 1992-07-03 1994-01-04 Ericsson Telefon Ab L M Ways to improve receiver sensitivity and speech immunity in DTMF reception
US5519774A (en) * 1992-12-08 1996-05-21 Bell Communications Research, Inc. Method and system for detecting at a selected station an alerting signal in the presence of speech
US5649002A (en) * 1994-12-13 1997-07-15 Colonial Data Technologies Corp. Method and apparatus for detecting a telephone CPE alerting signal
US5896560A (en) * 1996-04-12 1999-04-20 Transcrypt International/E. F. Johnson Company Transmit control system using in-band tone signalling
US5809133A (en) * 1996-05-24 1998-09-15 Advanced Micro Devices, Inc. DTMF detector system and method which performs frequency domain energy calculations with improved performance
US6269160B1 (en) * 1998-04-20 2001-07-31 Advanced Micro Devices, Inc. Communications device including an improved CPE alerting signal (CAS) detection system

Also Published As

Publication number Publication date
GB2385742A (en) 2003-08-27
GB2385742B (en) 2005-01-12
CA2419215C (en) 2007-10-16
US20030156709A1 (en) 2003-08-21
DE10308467A1 (en) 2003-09-04
DE10308467B4 (en) 2012-05-31
GB0303931D0 (en) 2003-03-26
US6940966B2 (en) 2005-09-06

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