Mci Communications Corporation

Robert W Born

John Arthur Fee

Paul D Litzenberger

Clint Allen Wagner

G Michael Eastep

A pool of echo cancellers provides echo cancellation on PCM digital transmissions on an as needed basis. A dynamic port device operating under the direction of call processing 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 DS0 channel. The dynamic port device can provide multiplexing up to SONET carrier levels immediately following selective echo cancellation.

Echo canceller system

System and method for controlling a telecommunications device such as an echo canceller within a telecommunications system. The system and method include and involve a switching system that is configured to receive a call from a calling station and to route said call within said telecommunications system, and an ancillary telecommunications device that is configured to control a call processing parameter to affect said call. The switching system and the ancillary telecommunications device are coupled to each other via a channelized call data network. The channelized call data network is configured to communicate data corresponding to the call over at least one data channel. The ancillary telecommunications device may control the call processing parameter to affect the call based on a directive issued by the switching system to the ancillary telecommunications device during the call. The directive is contained within at least one channel of the channelized call data network. Additionally, the channelized call data network may be completely used for call processing and call payload transport even after the ancillary telecommunications device operates as directed (e.g., activates, deactivates, etc.) during the call.

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Plano, TX, United States of America

Robert W Born