The good news... There is no configuration for the VCM card.
Bad news... you need to build an IP trunk, and it needs to be built on the IP Office side and the S8700 side, so I hope you have enough right to use and licesning on the s8700. Basicly, the IP Office has an IP address, and so does the CLAN and MedPro. I'm not that familiar with the S8700, but on the IP Office side, you add an IP trunk, set it's gateway to the s8700 IP, and match your H.323 mode to (probably) QSIG. There is a doc out there from Avaya on connecting to an S8500 (I think it's 8500). Respond back if you need help with specific details.