4.20.20. PrmECActive (Echo Cancellation)

Parameter Number: 0x1b12

Description: The PrmECActive parameter enables or disables echo cancellation in the IPLink gateway. In most cases the echo canceler should be enabled. For applications designed to run over a completely digital network, however, you might consider disabling the echo canceler to free up MIPS.

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.

Values:

• 0 = Disable echo cancellation
• 1 = Enable echo cancellation

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