echo started with second card

Hello

We had an Elastix box working with one 400p card, all nice and clear.

We added a second card and suddenly all lines starting having echo problems

I have tweaked
echotraining=300
rxgain=2
txgain=-8.0

and it lowers the problems, but not completely.

How ever, ... why did it start with the second card?
it was working nicely.

all pointers appreciated. The boss does not like the echo .

thanks

you can use software echo canceller OSLEC to try, open two lines in chan_dahdi.conf
echocancel=yes
echocancelwhenbridged=no
if still have problem,please supply ssh to me.
my email: This email address is being protected from spambots. You need JavaScript enabled to view it.