Most of the transmission systems we have in place were designed for digital voice communications ... but they are also used for data and networking. This video course provides you with the concrete knowledge of the telecommunication circuits necessary to a full understanding of data circuits and network services. Understand the concepts, standards and technologies for actually transmitting voice calls from one place to another, what "digital" actually means, and how it is implemented. We’ll take a practical tour of digital circuits, including T1, T3, and SONET. Without getting bogged down on technical details, we'll provide you with a basic understanding of how transmission systems work.