GB2290005B - Communications system - Google Patents

Communications system

Info

Publication number
GB2290005B
GB2290005B GB9410806A GB9410806A GB2290005B GB 2290005 B GB2290005 B GB 2290005B GB 9410806 A GB9410806 A GB 9410806A GB 9410806 A GB9410806 A GB 9410806A GB 2290005 B GB2290005 B GB 2290005B
Authority
GB
United Kingdom
Prior art keywords
communications system
communications
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.)
Expired - Fee Related
Application number
GB9410806A
Other versions
GB2290005A (en
GB9410806D0 (en
Inventor
Robert Ivor Davies
Mayank Kapadia
Rupinder Singh Oberoi
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.)
Motorola Solutions UK Ltd
Original Assignee
Motorola 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 Motorola Ltd filed Critical Motorola Ltd
Priority to GB9410806A priority Critical patent/GB2290005B/en
Publication of GB9410806D0 publication Critical patent/GB9410806D0/en
Publication of GB2290005A publication Critical patent/GB2290005A/en
Application granted granted Critical
Publication of GB2290005B publication Critical patent/GB2290005B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/18—Service support devices; Network management devices
    • H04W88/181—Transcoding devices; Rate adaptation devices
    • 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)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
GB9410806A 1994-05-28 1994-05-28 Communications system Expired - Fee Related GB2290005B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9410806A GB2290005B (en) 1994-05-28 1994-05-28 Communications system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9410806A GB2290005B (en) 1994-05-28 1994-05-28 Communications system

Publications (3)

Publication Number Publication Date
GB9410806D0 GB9410806D0 (en) 1994-07-20
GB2290005A GB2290005A (en) 1995-12-06
GB2290005B true GB2290005B (en) 1998-09-09

Family

ID=10755912

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9410806A Expired - Fee Related GB2290005B (en) 1994-05-28 1994-05-28 Communications system

Country Status (1)

Country Link
GB (1) GB2290005B (en)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI100932B (en) * 1995-04-12 1998-03-13 Nokia Telecommunications Oy Transmission of audio frequency signals in a radiotelephone system
CA2187832A1 (en) * 1995-12-21 1997-06-22 Jari Hagqvist Dtmf for downlink channel in a cellular/mobile/pcs telephone system
US5978676A (en) * 1996-11-15 1999-11-02 Telefonaktiebolaget L/M Ericsson (Publ) Inband signal converter, and associated method, for a digital communication system
EP0847212A1 (en) * 1996-12-06 1998-06-10 Koninklijke Philips Electronics N.V. Telephone device and communications system for reception of coded signals
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
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
US6208959B1 (en) * 1997-12-15 2001-03-27 Telefonaktibolaget Lm Ericsson (Publ) Mapping of digital data symbols onto one or more formant frequencies for transmission over a coded voice channel
WO2000031984A2 (en) * 1998-11-24 2000-06-02 Hughes Electronics Corporation Improved in-call dtmf transport for geostationary mobile satellite communication system
DE69910837T2 (en) 1999-02-04 2004-07-22 Nokia Corp. ELIMINATION OF SOUND DETECTION
US7215965B2 (en) 2001-11-01 2007-05-08 Airbiquity Inc. Facility and method for wireless transmission of location data in a voice channel of a digital wireless telecommunications network
US7508810B2 (en) 2005-01-31 2009-03-24 Airbiquity Inc. Voice channel control of wireless packet data communications
US7924934B2 (en) 2006-04-07 2011-04-12 Airbiquity, Inc. Time diversity voice channel data communications
CA2696848A1 (en) 2007-10-20 2009-04-23 Airbiquity Inc. Wireless in-band signaling with in-vehicle systems
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
US8073440B2 (en) 2009-04-27 2011-12-06 Airbiquity, Inc. Automatic gain control in a personal navigation device
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

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0332825A2 (en) * 1988-03-18 1989-09-20 Motorola, Inc. Cellular data telephone and method for communicating data
GB2262683A (en) * 1991-12-20 1993-06-23 British Aerospace Space And Co Dialled digit handler

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0332825A2 (en) * 1988-03-18 1989-09-20 Motorola, Inc. Cellular data telephone and method for communicating data
GB2262683A (en) * 1991-12-20 1993-06-23 British Aerospace Space And Co Dialled digit handler

Also Published As

Publication number Publication date
GB2290005A (en) 1995-12-06
GB9410806D0 (en) 1994-07-20

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20010528