Hi, I just did one of these. there are some more tips from the folks that helped me on a thread I posted. I did H323, but the process is very similiar.
1. Make should when you click on IP telephony under services that your published IP is set to the LAN connection that is plugged into your network, usually IP-LAN2.
2. The gateway type and protocol needs to be CSE and CSE1000.
3. In the NRS endpoint entry, check that the NCS option is checked.
4. You have to create routing entries for the endpoint so the NRS knows which digits to send to the BCM. For example if the BCM is going to have DNs/target lines that begin with a 5 you need a routing entry for 5.
5. You have to setup your target lines received number entry with the DID you want to pass through and then assign that target line to a system DN.
6. You can create destination codes on the BCM side to auto route dialed numbers to the IP trunks. If you want to send anything that starts with a 4 you need to setup a dest code and then under the schedules drop down,normal you tell it the route for the IP trunks.
Hope this helps. Post if you need more help.