A pool of echo cancellers (126) provides echo cancellation on PCM digital transmissions on an as needed basis. A dynamic port device (110) operating under the direction of call processing (134) identifies the transmissions requiring echo cancellation and routes the identified transmissions through echo cancellers. The echo cancellation can be performed on an as needed basis without having to dedicate an echo canceller to each DSO channel. The dynamic port device (110) can provide multiplexing up to SONET (114) carrier levels immediately following selective echo cancellation.
申请公布号
WO9800960(A1)
申请公布日期
1998.01.08
申请号
WO1997US11491
申请日期
1997.06.30
申请人
MCI COMMUNICATIONS CORP.
发明人
LITZENBERGER, PAUL, D.;FEE, JOHN, A.;BORN, ROBERT, W.;EASTEP, GUIDO, MICHAEL