Rhack is close, here is what you need.
Make sure the Cisco is passing Number Plan PRIVATE Type of Number ESN
(The TON bits are the same for a PUBLIC NATIONAL call)
You need to have INAC set up on the Routes.
Don't pass or insert AC2 (
anywhere in the dialstring
Under NET_DATA there is an AC2 prompt there, set the value to LOC
build a HLOC and apply a DMI table to strip off the LOC digits
Check you work locally on the switch. You should be able to dial AC2-HLOC-XXXX and have the call terminate on the same switch. If this works, you are ready top pass calls across the network.
Turn on DCH monitoring for the Q.Sig PRI
Place a call and capture the outbound DCH message to the Cisco, as well as the Inbound DCH messages at the far end.
If the call wont work, paste the data here and we can have a look. Sounds like you are the right track, just need a bit of guidance to the finish line.