[Freeswitch-users] FreeSWITCH in a University Environment

Does anyone know of any Universities running FreeSWITCH, or other open source VoIP for that matter, for local call routing between handsets? We're looking at replacing our old Avaya system or upgrade it, and the forklift upgrade from Avaya is ridiculously expensive (no surprise). We'd like to replace our Avaya system with a combination of OpenSIPS and FreeSWITCH and some Cisco routers for external PSTN access, but it's going to be a tough sell to our CIO, unless we can show someone else has done it already. Any pointers to other Universities would be great. Cheers, Gabe