Dahdi configuration

hi everybody

i am runnig a sangoma a104 card with dahdi, asterisk and libss7, but now i have to set the Channel 1 (Signaling Link) on ISUP. But i dont know where

in /etc/asterisk/chan_dahdi.conf
or /etc/dahdi/systems.conf / modules.conf

but there i cant see antyhing with ISUP.

anyone an idea where i can set up ISUP?

Greetings from Switzerland