Today’s real-time communications (RTC) no longer just consists of voice calls, but includes video conferencing, instant messaging, desktop sharing, team collaboration, and presence management. Making these different applications work together seamlessly requires a signaling protocol, known as the (SIP), which is used to establish RTC sessions between parties. As powerful as Session Initiation Protocol SIP is, it isn’t without challenges that include differences in implementation between vendors and the security issues involved when transporting data across the Internet. Session border controllers (SBCs) address these issues by controlling RTC within, and between enterprise and service provider IP networks, Download the SBC Dummies Guide to learn more.