I have configured a b410p isdn card with four NT ports. On the 4th NT port i put a TA which is on Windows os, and run an old isdn phone software(rvs phone). I have configured the extensions.conf file like this [from-dahdi] exten => 084766508,1,Dial(DAHDI/g14/${EXTEN}) exten => 084766508,2,Hangup() exten => […]