Communications Imagine a school without telephones or an intercom system. Schools rely on PBX phone systems and other communications equipment to link students, parents, teachers, administrators, vendors and suppliers, and the rest of the community. Internet links, data lines and satellite connections are growing more important each year. Electrical and electronic equipment is vulnerable to power surges and other electrical power problems. The loss of communications due to a short circuit or other cause can affect learning, interrupt activities and even halt school operations. © 2004 The Hartford Steam Boiler Insurance and Inspection Company.     All rights reserved.