A system and method for providing an apparent echo return loss is
provided. A communications network may include a gateway coupled to a
local exchange network. The gateway may receive signals from a packet
network and output signals to a circuit switched network, which may
output return signals to the gateway. The local exchange network may
provide an echo return loss on signals received from the gateway. The
gateway may also provide an initial echo return loss to signals prior to
sending the signals to the network. The echo return loss provided by both
the gateway and the local exchange network may enable the gateway to
determine when to trigger adaptation in order to provide estimates of
echo signals generated by the network, and to subsequently eliminate
these echo signals from the return signals.