Echo canceller system

H - Electricity – 04 – B

Patent

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Details

H04B 3/23 (2006.01) H04M 3/00 (2006.01) H04M 3/18 (2006.01) H04M 9/08 (2006.01) H04Q 11/04 (2006.01)

Patent

CA 2258778

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.

Un ensemble d'annuleurs d'écho (126) assure l'annulation de l'écho sur des transmissions numériques MIC (modulation par impulsions et codage) lorsque cela s'avère nécessaire. Un dispositif (110) à points de connexions dynamiques fonctionnant sous la direction d'un traitement (134) d'appel identifie les transmissions nécessitant une annulation de l'écho et envoie les transmissions identifiées dans les annuleurs d'écho. L'annulation de l'écho peut être effectuée selon les besoins sans qu'il soit nécessaire de consacrer un annuleur d'écho à chaque canal DSO. Le dispositif (110) à points de connexion dynamiques assure le multiplexage jusqu'aux niveaux de porteuse du réseau optique synchrone (SONET) juste après l'annulation sélective de l'écho.

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