THE ELECTRICAL ECHO MEASUREMENT UNDER THE ECHO CANCELLATION ACTIVITY

This work is about to obtain an electrical echo signal for technical information security tasks in conditions when echo cancellers are active. Due to the fact that echoes are considered interference in telecommunications systems, special means, named echo cancellers, are used to suppress them. The echo cancellers features are considered, and ways to bypass them are shown. Experimental data confirming the effectiveness some of them are presented.