[Asterisk-Users] How do I reduce echo on the Caller side

[Joel Jn-Francois]

Hi,

I get an echo only from the caller end when I am making calls. I only get 
it for some VOIP providers.  I am using asterisk Asterisk 
CVS-v1-0-03/26/05-16:54:47 and Grandstream HandyTone 486 and 488.  My 
default codec is ulaw.  Is there any way I can reduce the echo without 
comprising quality?

Thanks
Joel