In the past, automation of the power network was a very specialized area but recently due to deregulation and privatization the area has become of a great importance because companies require more information and communication to minimize costs, reduce workforce and minimize errors in order to make a profit. This work covers engineering requirements and business implications of this cutting-edge and ever-evolving field. It provides a unique insight into a fast-emerging and growing market that has become and will continue to evolve into one of leading communication technologies. It is written in a practical manner to help readers handle the transformation from the old analog environment to the modern digital communications-based one.