Are you trying to integrate VCSc to Sype? I think this solution will not work and there's no such official deployment guides on how to do it.
Basically VCS can be integrated to other call controls/SIP servers (Another VCS, CUCM, AVAYA , Microsoft Lync/OCS etc.) using SIP trunk. This is met by creating a "Neighbor Zone" on the VCS and creating search rules/transforms to make successful calls between the SIP trunk.