I would also add to James' posting that it should not really make a difference which protocol is being used on the backend to Communications Manager. This "protocol war" was waged some time ago to really disrupt the market. We validated with our CUCM 5.x release that SIP or SCCP, it does not make a difference when we offered both. The number of customers running a pure SIP signalling backend is far and few between as it is not really that important.
What is important is integration to other systems, vendors, etc and that we can do via SIP. The endpts, they will all run SIP at some point so we can continue to remain Open and follow those standards.
Scott
