CA2171485A1 - DTMF Tone Passer in a Voice Communication System - Google Patents

DTMF Tone Passer in a Voice Communication System

Info

Publication number
CA2171485A1
CA2171485A1 CA2171485A CA2171485A CA2171485A1 CA 2171485 A1 CA2171485 A1 CA 2171485A1 CA 2171485 A CA2171485 A CA 2171485A CA 2171485 A CA2171485 A CA 2171485A CA 2171485 A1 CA2171485 A1 CA 2171485A1
Authority
CA
Canada
Prior art keywords
tone
signal
subscriber
telephone
analog
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
CA2171485A
Other languages
French (fr)
Other versions
CA2171485C (en
Inventor
Shrirang Jangi
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.)
DirecTV Group Inc
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2171485A1 publication Critical patent/CA2171485A1/en
Application granted granted Critical
Publication of CA2171485C publication Critical patent/CA2171485C/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
    • H04M1/253—Telephone sets using digital voice transmission
    • 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
    • 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
    • H04Q1/46—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies comprising means for distinguishing between a signalling current of predetermined frequency and a complex current containing that frequency, e.g. speech current

Abstract

The present invention relates to an apparatus and method for sending and receiving digital signals in a voice communication system (10). The apparatus includes a first subscriber analog telephone (12), a transmitter (13), a receiver (19) including a tone generator (20), and a second subscriber analog telephone (23). The transmitter (13) includes a tone detector (14), a first antenna (16), and a second antenna (18). In the preferred embodiment, the first subscriber analog telephone (12) is connected to the transmitter (13), and the second subscriber analog telephone (23) is connected to the receiver (19). The transmitter (13) receives an analog signal (11) carrying speech and DTMF signals from the first subscriber telephone (12). The transmitting unit (13) converts the analog speechsignal into a digital speech signal. The tone detector (14) determines whether the digital speech signal contains any digit information, preferably dialed digits such as dual tone multifrequency (DTMF) tones, and encodes any detected digits into special tone packets. The transmitting unit (13) compresses the digital speech signal, replaces compressed speech packets with any special tone packets from the tone detector (14) if necessary, and transmits a digitally modulated and compressed output signal using the antenna (16) via an RF transmission channel.
The digitally compressed signal is received by the receiver (19) using the second antenna (18). The tone generator (20) recovers any special tone packets in the received signal and generates a corresponding tone signal to be sent to the second telephone subscriber (23). The receiver (19) decompresses the digital speech signal and converts the signal to an analog speech signal (22) that is sent to the second subscriber telephone (23).
CA002171485A 1995-03-23 1996-03-11 Dtmf tone passer in a voice communication system Expired - Fee Related CA2171485C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US40880595A 1995-03-23 1995-03-23
US08/408,805 1995-03-23

Publications (2)

Publication Number Publication Date
CA2171485A1 true CA2171485A1 (en) 1996-09-24
CA2171485C CA2171485C (en) 1999-10-12

Family

ID=23617836

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002171485A Expired - Fee Related CA2171485C (en) 1995-03-23 1996-03-11 Dtmf tone passer in a voice communication system

Country Status (4)

Country Link
US (1) US5666357A (en)
EP (1) EP0734185A2 (en)
CA (1) CA2171485C (en)
MX (1) MX9601081A (en)

Cited By (1)

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US9762740B2 (en) 2012-03-14 2017-09-12 Mitel Networks Corporation Preventing double digit detection caused by in-band dual-tone multi-frequency signaling

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WO1998027758A2 (en) * 1996-12-19 1998-06-25 Diva Communications Methods and apparatus of providing transparency of dtmf signaling tones across a digital cellular voice channel
KR100206473B1 (en) 1996-12-31 1999-07-01 윤종용 Tone generating apparatus in an exchange
US6690681B1 (en) 1997-05-19 2004-02-10 Airbiquity Inc. In-band signaling for data communications over digital wireless telecommunications network
US6493338B1 (en) 1997-05-19 2002-12-10 Airbiquity Inc. Multichannel in-band signaling for data communications over digital wireless telecommunications networks
FR2767245B1 (en) * 1997-08-08 1999-10-15 Matra Communication DIGITAL RADIO COMMUNICATION STATION
US6781968B1 (en) 1997-09-08 2004-08-24 Marc Arnold Wireless communication system, apparatus and method using an atmospheric platform having a wideband trunkline
US6009383A (en) * 1997-10-30 1999-12-28 Nortel Networks Corporation Digital connection for voice activated services on wireless networks
WO1999029084A2 (en) * 1997-11-27 1999-06-10 Northern Telecom Limited Method and apparatus for performing spectral processing in tone detection
US6650662B1 (en) 1997-12-12 2003-11-18 International Business Machines Corporation Method and system for transmitting a DTMF signal with compressed voice in a packet switching network
US6226304B1 (en) * 1998-01-28 2001-05-01 Hughes Electronics Corporation Leased line optimization and voice quality improvement in bandwidth constrained communication systems
KR100258129B1 (en) * 1998-03-17 2000-06-01 서평원 AT cell conversion device including tone and DFM generation function
US6385192B1 (en) * 1998-03-24 2002-05-07 Siemens Information And Communication Networks, Inc. Method and apparatus for DTMF signaling on compressed voice networks
US6151514A (en) * 1998-04-22 2000-11-21 Nortel Networks Corporation Method and apparatus for normalizing DTMF messages from a cellular mobile station
US6230133B1 (en) * 1998-06-24 2001-05-08 Ameritech, Inc. Home office communication system and method
US6046977A (en) * 1998-09-23 2000-04-04 Advanced Microdevices, Inc. Method and apparatus for detecting signal misalignment
JP4640440B2 (en) * 1998-09-25 2011-03-02 株式会社日立製作所 Communication device
JP2000165915A (en) * 1998-09-25 2000-06-16 Hitachi Telecom Technol Ltd Dtmf signal transmission system and communication equipment
JP2005269663A (en) * 1998-09-25 2005-09-29 Hitachi Communication Technologies Ltd Communication apparatus
JP2005210755A (en) * 1998-09-25 2005-08-04 Hitachi Communication Technologies Ltd Communications system and communication method
US6298055B1 (en) * 1998-10-26 2001-10-02 Cisco Technology, Inc. Early detection of in-band signals in a packet voice transmitter with reduced transmission delay
WO2000031984A2 (en) * 1998-11-24 2000-06-02 Hughes Electronics Corporation Improved in-call dtmf transport for geostationary mobile satellite communication system
US6775265B1 (en) * 1998-11-30 2004-08-10 Cisco Technology, Inc. Method and apparatus for minimizing delay induced by DTMF processing in packet telephony systems
US7233605B1 (en) * 1998-11-30 2007-06-19 Cisco Technology, Inc. Method and apparatus for minimizing delay induced by DTMF processing in packet telephony systems
CA2301435C (en) * 1999-04-16 2006-10-10 At&T Corp. Method for reducing congestion in packet-switched networks
JP3580723B2 (en) * 1999-04-27 2004-10-27 沖電気工業株式会社 Receive buffer control method and voice packet decoding device
EP1121786A4 (en) * 1999-08-12 2007-05-30 Telogy Networks Inc Fast dtmf identification
US7039044B1 (en) * 1999-10-14 2006-05-02 Mindspeed Technologies, Inc. Method and apparatus for early detection of DTMF signals in voice transmissions over an IP network
US7110391B1 (en) * 2000-03-03 2006-09-19 Nortel Networks Limited Transporting telephony signaling over a data network
US6961320B1 (en) * 2000-04-03 2005-11-01 Hughes Electronics Corporation In-band transmission of TTY/TTD signals for systems employing low bit-rate voice compression
US6801622B1 (en) * 2000-10-31 2004-10-05 Cisco Technology, Inc. Devices, software and methods for passing DTMF signals under voice compression
US7035293B2 (en) * 2001-04-18 2006-04-25 Broadcom Corporation Tone relay
JP3600189B2 (en) * 2001-06-19 2004-12-08 松下電器産業株式会社 Packet transmitting / receiving apparatus and packet transmitting method
US7403141B2 (en) * 2002-02-12 2008-07-22 Broadcom Corporation Wireless local area network device supporting enhanced call functions
US20030194082A1 (en) * 2002-04-15 2003-10-16 Eli Shoval Method and apparatus for transmitting signaling tones over a packet switched network
GB0322711D0 (en) * 2003-09-27 2003-10-29 Ericsson Telefon Ab L M Intelligent multimedia calls
US7508810B2 (en) 2005-01-31 2009-03-24 Airbiquity Inc. Voice channel control of wireless packet data communications
DE102005046170A1 (en) * 2005-09-27 2007-04-12 Siemens Ag DTMF dialing signals insertion method e.g. into data stream containing data packets, involves inserting DTMF dialing signals into data packets of data stream in which coded useful information is contained
US7924934B2 (en) 2006-04-07 2011-04-12 Airbiquity, Inc. Time diversity voice channel data communications
EP2206328B1 (en) 2007-10-20 2017-12-27 Airbiquity Inc. Wireless in-band signaling with in-vehicle systems
GB2461890B (en) * 2008-07-16 2011-03-02 Tunstall Group Ltd Tone signalling
US7983310B2 (en) * 2008-09-15 2011-07-19 Airbiquity Inc. Methods for in-band signaling through enhanced variable-rate codecs
US8594138B2 (en) 2008-09-15 2013-11-26 Airbiquity Inc. Methods for in-band signaling through enhanced variable-rate codecs
US8036600B2 (en) 2009-04-27 2011-10-11 Airbiquity, Inc. Using a bluetooth capable mobile phone to access a remote network
US8418039B2 (en) 2009-08-03 2013-04-09 Airbiquity Inc. Efficient error correction scheme for data transmission in a wireless in-band signaling system
US8249865B2 (en) 2009-11-23 2012-08-21 Airbiquity Inc. Adaptive data transmission for a digital in-band modem operating over a voice channel
US8848825B2 (en) 2011-09-22 2014-09-30 Airbiquity Inc. Echo cancellation in wireless inband signaling modem
EP2640051B1 (en) * 2012-03-14 2018-08-01 Mitel Networks Corporation Packetising DTMF signals

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US4677656A (en) * 1984-06-19 1987-06-30 Motorola, Inc. Telephone-radio interconnect system
US4675863A (en) * 1985-03-20 1987-06-23 International Mobile Machines Corp. Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of RF channels
US5392348A (en) * 1991-11-25 1995-02-21 Motorola, Inc. DTMF detection having sample rate decimation and adaptive tone detection

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9762740B2 (en) 2012-03-14 2017-09-12 Mitel Networks Corporation Preventing double digit detection caused by in-band dual-tone multi-frequency signaling

Also Published As

Publication number Publication date
MX9601081A (en) 1997-02-28
CA2171485C (en) 1999-10-12
US5666357A (en) 1997-09-09
EP0734185A2 (en) 1996-09-25

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed
MKLA Lapsed

Effective date: 20050311