Method of cancelling echoes in a telecommunications system and an echo canceller for the execution of the method

A method of suppressing echoes in a telecommunications system wherein an exchange of information takes place between a local subscriber (X) and a subscriber (Y) at the remote end of a transmission link, and at least one subscriber (X) is assigned an echo canceller (5), the parameters of which are set i.a. as a function of an echo delay time, characterised in that the signs of the signal (x(t)) transmitted by a subscriber (X) and the signal (y(t)) received by the subscriber (X) are determined at equidistant time intervals (T1) so that sign sequences (xi, yi) arise which are stored and compared with one another, and that in the event of a direct correspondence or a correspondence as a result of inversion (xi=yi or xi=yi) of the sign sequences (xi, yi) of the received signal (y(t)) and of the transmitted signal (x(t)), the received signal (y(t)) is detected as an echo and the echo delay time (i) is calculated.