Hi Ihab el Bakri,
you seem to be confusing mISDN with the sangoma wanpipe stack!
OpenBSC, as you noticed, only supports cards supported by mISDN.
Sangoma cards are entirely different, they use a different driver stack.
Trying to use both at the same time can only result in trouble.
So unfortunately you're on your own with doing the required development/integration work to getting it to work :(