Session Initiation Protocol has become the call control protocol of choice for VoIP networks because of its open and extensible nature. However, the integrity of call signaling between sites is of utmost importance, and SIP is vulnerable to attackers when left unprotected. Read Article

SIP trunking is gaining popularity not just among service providers, but also enterprises and universities. SearchUnifiedCommunications.com, which covered the recent VoiceCon held in Orlando, reported there are now more than 134 service providers offering the SIP trunking options, including 98 of the top 100 providers in the world.