We've been acquired. The new combined company is expanding the Cisco IPT deployment and none of the design dox I've seen mentions anything other than a LAN connection between Unity and CallManager for the integration requirements. I have a 3 server CCM 4.0(2a)sr2b cluster as well as a 2 server 4.0(4)sr1 Unity co-lo in Dallas. I know I need to keep the next pair of Unity servers 40ms from the Exchange cluster they will be servicing, which is in Irvine, CA. I know that a minimum bandwidth requirement of 45MB is needed for geographically separated Unity pub/sub. Will a WAN link between the CCM cluster in Dallas and the Unity cluster in Irvine have any requirements based on bandwidth or delay minimums to support a PBX integration of Unity in Irvine, and CCM in Dallas?