 | The Business Value of SIP VoIP and Trunking: Read how VoIP leveraged all the knowledge developed by the technology sector and became a mainstream building block of voice service. |  | SIP Trunks - Benefits and Best Practices: Back in the days of wireline telephony, when all phone calls went over the Public Switched Telephony Network (PSTN), businesses would purchase “trunks” - dedicated lines or a bundle of circuits - from their service provider. |  | SIP Trunks and UC Security: This white paper examines security considerations when using SIP trunks as a means of connecting Unified Communication Systems to the outside world. |