FULL DUPLEX TELEPHONE SET USING ECHO CANCELLATION AND SIDE TONE MANAGEMENT FOR HIGH GAIN STABILITY

Details for Australian Patent Application No. 2003258096 (hide)

Owner PLANTRONICS, INC.

Inventors LASHLEY, David; DOSS, Robert

Pub. Number AU-A-2003258096

PCT Number PCT/US03/24577

PCT Pub. Number WO2004/025937

Priority 10/243,292 12.09.02 US

Filing date 4 August 2003

Wipo publication date 30 April 2004

International Classifications

H04M 001/58 Substation equipment, e.g. for use by subscribers - Anti-side-tone circuits

H04M 009/08 Arrangements for interconnection not involving centralised switching - Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic

H04B 003/23 Line transmission systems - using a replica of transmitted signal in the time domain, e.g. echo cancellers

Event Publications

13 November 2003 Complete Application Filed

  Priority application(s): 10/243,292 12.09.02 US

20 May 2004 Application Open to Public Inspection

  Published as AU-A-2003258096

26 May 2005 Application Lapsed, Refused Or Withdrawn, Patent Ceased or Expired

  This application lapsed under section 142(2)(f)/See Reg. 8.3(3). Examination has not yet been requested or directed for this application. Note that applications or patents shown as lapsed or ceased may be restored at a later date.

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