NOTAS: | "Examines engineering aspects of integrated services digital networks, the common channel signalling system number 7 without which they cannot function fully, and the digital network synchronization that makes both possible. Includes a tutorial to the three topics for students of telecommunications without specialized knowledge. Discusses basic concepts, planning and testing synchronization, functions of the signalling link level, services and protocols, the user part, packet and frame mode services, timing, and other topics." |