Does anyone have experience with IP Paging over a S2S VPN? We're looking at a couple solutions (Informacast and Cistera) but are unsure of Multicast traffic over the VPN. We have about 15 S2S VPNs with one IP Phone at each site, We would like to be able to page out to all stations at once or just a one to one page. Since the phones are registered with CUCM 7.1 it seems like there shouldn't be any issues but being that there is multicast involved and it can't travel over a IPSec tunnel i'm concerned. Does anyone have advice or a similar config/solution they could share?