Enable Polarity
Reversal
If enabled, a polarity reversal will be marked as received when an outgoing call is
answered by the remote party. For some countries, a polarity reversal is used for
signaling the disconnection of a phone line and the call will be considered as Hangup
on a polarity reversal. The default setting is "Yes".
Echo Cancellation
Specify "ON", "OFF" or a value (the power of 2) from 32 to 1024 as the number of
taps of cancellation.
Note:
When configuring the number of taps, the number 256 is not translated into
256ms of echo cancellation. Instead, 256 taps mean 256/8 = 32 ms. The default
setting is "ON", which is 128 taps.
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