asterisk users - Jul 2004 - Does the SPA-3000 get rid of echo that the X100P can't?

After trying everything under the sun to get rid of echo on my X100P,
I'm curious if anyone managed to solve the echo issues by switching to a
SPA-3000?

As well, if you have multiple SPA-3000's, can you create dial-out groups
similar to the Dial(ZAP/g1) functionality?

Thanks.

-- 
Mike Benoit <ipso@snappymail.ca>