NTouchTel.com has a first hand look at new products entering the market in the telecommunication industry. They choose the best product options and feature them here.
Session Initiation Protocol (SIP) is the common signaling standard for real-time communications including Voice over Internet Protocol (VoIP). SIP is an open-standard which allows carrier voice equipment to interoperate seamlessly with customer premise equipment (CPE). The logical voice channel established between them is referred to as a SIP Trunk; a virtual phone line that utilizes a Broadband connection for access.