# Enabling echo cancellation

Echo cancellation is generally not required on digital trunks. It is disabled by default on the AG 2000-BRI board.

To enable echo cancellation:

Step | Action
1 | Include the following statement in the board keyword file: DSP.C5x[x].Files = echo.m54 where x = the next available index
2 | Set the appropriate ADI service parameters in your application and in your system.

Refer to the ADI Service Developer's Reference Manual for information on configuring echo cancellation about the AG 2000-BRI board.