Hi try adding the following line to zapata.conf at the bottom:- #include zapata-channels.conf http://sourceforge.net/forum/forum.php?thread_id=1266472&forum_id=420324 asterisk-users@lists.digium.com asterisk-users@lists.digium.com When ever I try to dial a pstn number, I get this message. I did a yum update and also recompiled the zaptel and asterisk modules in /usr/src. I used the same machine as I was using it for asterisk@home 0.6.