Hi, I'm in big trouble I've got two serwers with Asterisk 1.03 both serwer with 2 ISDN cards. When I call isdn server card and then choose other msn (disa) I can make connection with other phone (I've got standard ISDN PBX). But echos are horrible. My configuration: Athlon 2.0 256 RAM 2 HFC cards i4linux. mandrake 10.1 kernel 2.8.1 and second server Celeron 2.6 256 Ram 2 Winbond based ISDN cards I4linux. slackware kernel 2.4.26 Especially on the second server I have echo after one second, I looks like something records sound and play it 1,5 sek after I say something. I'm looking for solution. Any help? Many thanks in advance. BR, Corvin