SIP Packs a Punch

摘要

SIP has emerged as the undisputed protocol champ in its class, knocking H.323 for a loop. Session Initiation Protocol has not only proved it can deliver standards-based VoIP (voice over IP) phone systems, it also has the legs to impact many other technologies involving real-time communications, including instant messaging, presence, 3G wireless and packet over cable. In addition, SIP is making it a lot easier to add related services to your network, such as voicemail, IVR (interactive voice response) and unified messaging. Many existing products boast SIP functionality, and new offerings are following suit. All have the potential to make business communications more productive and less expensive. If you're considering a purchase in these areas, ask prospective vendors about their road maps for incorporating SIP functionality. Get specifics on what features the vendor plans to add, and when, and demand interoperability assurances.