asterisk users - Apr 2005 - Echo on analog line related to FXO card?

Hello everybody,

I get quite a bit of echo on my analog line. I know about the possible 
issues outside of the PBX, but my question here is: Does anybody have 
any experience with different FXO interface cards bahving differently in 
this respect?
I am using Digitum's TDM400P, and I am wondering if switching to a 
different interface card might "ease my pain", since I have no desire
to
change wiring etc in the building I am in....

Thanks a lot
 Maik

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