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4.20.21. PrmECOrder (Number of Taps)
Description: The PrmECOrder parameter defines the number of taps (1 tap = 0.125 millisecond) that the echo canceler samples.
Because IP telephony is based on placing long distance calls using local central office circuits, the end points do not receive echo canceled signals. The IPLink gateway, therefore, must provide the equivalent of Telco grade, long distance echo cancellation. The IPLink echo canceler provides this capability by removing the echo from the remote channel arriving from the public switched telephone network (PSTN) interface. Parameters used to control the operation of the echo canceler are: PrmECOrder, PrmECMu and PrmECNLPActive.
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