Echo problems while using Laptop mic and speakers

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Hi all,
         I am interested to know what is the best possible set of
parameters to use along with pjsua on a laptop running win7 while using the
built in mic and speakers, so as to achieve best possible echo
cancellation. I have tried setting *--quality* =10 and increasing the
*--ec-tail
*value and also tried the 3 different echo canceller algorithms for * --ec-opt.
*Still I haven't been able to achieve satisfactory echo cancellation. The
far side doesn't hear any echo when using the same laptop for
communications using Skype or even GoogleTalk. What would be the best
possible configuration to use to get similar echo cancellation experience
while using PJSIP. Any help on this would be appreciated. Thank you.

Regards,
Sandeep
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