Far south networks Com.X1 PBX, Руководство администратора

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3.2.5.2Configuring Analogue Extension (FXS) ports
Field Content
Input gain Indicates how much, if any, gain adjustment should be performed
in the input direction. Values are in deciBels.
Output gain Indicates how much, if any, gain adjustment should be performed
in the output direction. Values are in deciBels.
Echo canceller The echo cancellation delay and algorithm to be employed on the
port. The delay up to which the echo canceller can compensate
is specified in milli-seconds. An optional non-linear processing
echo suppression algorithm (NLP) can also be employed during
echo cancellation. If you expect the devices connected to the port
to be in a noisy environment how-ever, you might prefer not to
enable NLP, as it might result in the near-end noise being cut off
when speech ceases. Some users are uncomfortable with this.
NLP is recommended for quiet environments.