A first aspect provides an echo canceller suitable for such as modem-modem communication systems, such as in a
Telephone Line Extender system, either with a
wireless or wire-borne communication. The echo canceller comprising
adaptive filter means for receiving a first
signal and for providing a filter output
signal at least partly in response to the first
signal,
delay means in a signal path of a second signal in order to provide a
delay output signal, and summation means for adding the filter output signal and the
delay output signal in order to prepare the second signal for digital transmission. Another aspect of the invention provides a
Telephone Line Extender system comprising a portable part (PP), or extension unit, for connection to a modem, and a fixed part (FP), or base unit, for connection to an analog
telephone plug, these PP and FP parts comprising means for exchange of data, such as
wireless means, these exchange of data means comprising an echo canceller as described above. The TLE
system comprises modem
cheating means adapted to manipulate signals in a negotiation with the modem, preferably A and B signals in phase 2 of e.g. a V.34 negotiation. In still another aspect provides a settop box comprising a TLE system as described.