Asterisk and Hipath 3700

I Have a Hipath 3700 with 2 TMS2M (one for external access and one for conn to asterisk)

In asterisk i have a t 121 to connect with hipath

anyone with succesful implementaition of the above sceme;

It would be helpfule because i cant get an external line (asterisk ->hipath->pots)
all other routes working fine

thank you