[asterisk-dev] Queries regarding Echo Cancellation in Zaptel-1.2.6

[Eric "ManxPower" Wieling]

Chan Kwang Mien wrote:

> To simulate echo, the call at IP Phone A is being answered by its
> speaker. I was expecting that the echo sent back by IP Phone A to Analog
> Phone B would be cancelled by the echo canceller at the IP PBX. But it
> seems that I could still hear echo although I have enabled echo
> cancellation in zaptel.

Don't use the speakerphone feature of Phone A.  Using the speakerphone 
is causing your test to not work.

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