Form 15:
N=4, M=0, X=(blank), CDN=1
We've tried changing N to 10, and M to 8, as well as some other values for N and M...

In From 13, we used descriptor 1, as "T1 DID/LOOP-TIE". And it shows 23 trunks assigned. (Doesnt seem to be an option for PRI.. maybe I should try the "Basic Rate" type?