IT1183492B - Rilativo di tono digitale - Google Patents

Rilativo di tono digitale

Info

Publication number
IT1183492B
IT1183492B IT20103/85A IT2010385A IT1183492B IT 1183492 B IT1183492 B IT 1183492B IT 20103/85 A IT20103/85 A IT 20103/85A IT 2010385 A IT2010385 A IT 2010385A IT 1183492 B IT1183492 B IT 1183492B
Authority
IT
Italy
Prior art keywords
digital tone
tone release
release
digital
tone
Prior art date
Application number
IT20103/85A
Other languages
English (en)
Other versions
IT8520103A0 (it
Inventor
Gorden J Reesor
Patrick B Beirn
Zbigniew Boleslaw Styrna
Original Assignee
Mittel Corp
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 Mittel Corp filed Critical Mittel Corp
Publication of IT8520103A0 publication Critical patent/IT8520103A0/it
Application granted granted Critical
Publication of IT1183492B publication Critical patent/IT1183492B/it

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
    • H04Q1/457—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling with conversion of multifrequency signals into digital signals
    • H04Q1/4575—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling with conversion of multifrequency signals into digital signals which are transmitted in digital form

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Electrophonic Musical Instruments (AREA)
IT20103/85A 1984-11-09 1985-03-27 Rilativo di tono digitale IT1183492B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA000467548A CA1216380A (en) 1984-11-09 1984-11-09 Digital tone detector

Publications (2)

Publication Number Publication Date
IT8520103A0 IT8520103A0 (it) 1985-03-27
IT1183492B true IT1183492B (it) 1987-10-22

Family

ID=4129120

Family Applications (1)

Application Number Title Priority Date Filing Date
IT20103/85A IT1183492B (it) 1984-11-09 1985-03-27 Rilativo di tono digitale

Country Status (7)

Country Link
US (2) US4669114A (it)
JP (2) JPS61118092A (it)
CA (1) CA1216380A (it)
DE (1) DE3531793A1 (it)
FR (1) FR2573602A1 (it)
GB (1) GB2166925B (it)
IT (1) IT1183492B (it)

Families Citing this family (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8502008A (nl) * 1985-07-12 1987-02-02 Philips Nv Ontvanginrichting voor het onder bescherming van een stoorsignaal/spraaksignaalbewakingsfunctie herkennen van een aantal verschillende en voorafbepaalde frequentiecombinaties van toonfrequente signaleringscomponenten.
US4935958A (en) * 1986-09-22 1990-06-19 Dytel Corporation Busy/no-answer call completion equipment
US5173933A (en) * 1990-09-25 1992-12-22 World Communication Systems, Inc. Interface between mobile telecommunication stations and trunks that link to communication carriers
US5163050A (en) * 1991-01-23 1992-11-10 Digital Sound Corporation Configurable parameter dtmf detector
US5327433A (en) * 1991-08-30 1994-07-05 Adtran Corporation Digital tandem channel unit interface for telecommunications network
JPH05167679A (ja) * 1991-12-17 1993-07-02 Hitachi Ltd 交換システムおよび加入者回路制御装置
US5442696A (en) * 1991-12-31 1995-08-15 At&T Corp. Method and apparatus for detecting control signals
US5347611A (en) * 1992-01-17 1994-09-13 Telogy Networks Inc. Apparatus and method for transparent tone passing over narrowband digital channels
US5689592A (en) * 1993-12-22 1997-11-18 Vivo Software, Inc. Parallel processing of digital signals in a single arithmetic/logic unit
CA2116043C (en) * 1994-02-21 1997-09-23 Alexander F. Tulai Programmable digital call progress tone detector
US5506885A (en) * 1994-08-11 1996-04-09 Hamilton; Chris Method of adapting processing parameters in a call processing system
EP0809914A1 (en) * 1995-02-13 1997-12-03 Cidco, Incorporated Method and structure for detecting a customer premises equipment alerting signal
US5729602A (en) * 1995-04-11 1998-03-17 Comex Systems, Inc. Programmable multi-tone voice message starting system
KR0145873B1 (ko) * 1995-07-06 1998-08-17 김광호 사전학습을 이용한 톤인식방법
KR0149759B1 (ko) * 1995-11-20 1998-11-02 김광호 디지탈신호 처리칩을 이용한 디티엠프 검출기 및 구현방법
AU717752B2 (en) * 1995-12-20 2000-03-30 Alcatel Australia Limited Tone detector
AUPN722995A0 (en) * 1995-12-20 1996-01-18 Alcatel Australia Limited Tone detector
US6144721A (en) * 1996-01-05 2000-11-07 Communications Technology Corporation Apparatus and method for line pair testing and fault diagnostics
US7290288B2 (en) * 1997-06-11 2007-10-30 Prism Technologies, L.L.C. Method and system for controlling access, by an authentication server, to protected computer resources provided via an internet protocol network
WO1999029084A2 (en) * 1997-11-27 1999-06-10 Northern Telecom Limited Method and apparatus for performing spectral processing in tone detection
AU3289899A (en) * 1998-02-12 1999-08-30 Intervoice Limited Partnership Call progress tone detection
DE10043160B4 (de) * 2000-09-01 2009-11-26 Infineon Technologies Ag Tonsignalerkennungsschaltung und Verfahren zur Erkennung von Tonsignalen
US20030123574A1 (en) * 2001-12-31 2003-07-03 Simeon Richard Corpuz System and method for robust tone detection
TW569602B (en) * 2002-07-08 2004-01-01 Benq Corp Device and method for playing a ring signal based on a mediate ring information in a communication apparatus
GB2410661A (en) * 2004-01-30 2005-08-03 Mitel Networks Corp Narrow band tone detection in echo cancelling system
US20070115947A1 (en) * 2004-12-30 2007-05-24 Nathan Nelson System and method for routing call traffic
US8948138B2 (en) * 2011-03-23 2015-02-03 Telefonaktiebolaget L M Ericsson (Publ) Signal compression for backhaul communications using linear transformations
JP6573302B2 (ja) * 2014-07-14 2019-09-11 国立研究開発法人産業技術総合研究所 生体信号検出装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3863030A (en) * 1972-06-01 1975-01-28 Gte Automatic Electric Lab Inc Pcm tone receiver using digital spectrum analysis
JPS6028461B2 (ja) * 1978-02-03 1985-07-04 株式会社日立製作所 デイジタル多周波信号受信器
US4334273A (en) * 1979-04-24 1982-06-08 Kokusai Denshin Denwa Co., Ltd. Signal processing system using a digital technique
CA1137565A (en) * 1979-05-22 1982-12-14 Masaharu Kawaguchi Digital multi-frequency receiver
US4327258A (en) * 1980-04-03 1982-04-27 Halcyon, Inc. Method and apparatus for rapid evaluation of parameters affecting voiceband data transmission
US4403298A (en) * 1981-06-15 1983-09-06 Bell Telephone Laboratories, Incorporated Adaptive techniques for automatic frequency determination and measurement

Also Published As

Publication number Publication date
US4694482A (en) 1987-09-15
IT8520103A0 (it) 1985-03-27
US4669114A (en) 1987-05-26
FR2573602A1 (fr) 1986-05-23
DE3531793C2 (it) 1990-05-23
JPH0496190U (it) 1992-08-20
GB8506251D0 (en) 1985-04-11
GB2166925A (en) 1986-05-14
JPH0731657Y2 (ja) 1995-07-19
GB2166925B (en) 1988-11-16
JPS61118092A (ja) 1986-06-05
DE3531793A1 (de) 1986-05-15
CA1216380A (en) 1987-01-06

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Legal Events

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TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19970328