Are you familiar with SIP? SIP, which stands for Session Initiation Protocol, is the protocol that provides the backbone for most VoIP and unified communications platforms. SIP binds multiple media types together and allows for the seamless integration of voice, video and IM. In a recent Reality Check podcast, Elaine Hom spoke with Jon Arnold to discuss the top 5 things you need to know about SIP. Listen and learn- Reality Check: Five Things You Should Know About SIP.