Lynda - Learning VoIP and Unified Communications
Today, when you make a call, you are most likely using Voice over IP or VoIP. VoIP is changing the way we communicate. VoIP uses the existing Internet and network to transfer and route voice traffic in IP packets. In many cases, it is a part of a Unified Communications (UC) system. UC integrates VoIP, video, email, and instant messaging into one seamless business application. Learn about UC and its many layers, including terminals, applications, codecs, gateways, real-time protocols, and network operations, so you can integrate UC and VoIP into your business network.
https://www.lynda.com/IT-Infrastructure-tutorials/Learning-VoIP-Unified-Communications/594445-2.html
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