Synchronization of a Digital Network

A brief description is given of synchronous and plesiochronous digital networks, with discussion of slip rate performance requirements. Various methods of synchronization are described with emphasis on the selection of the preselected alternate master-slave (PAMS) method. The evolution of a synchronized network is discussed, including basic topology rules, network stability, and domestic satellite considerations. To ensure that a given slip rate is maintained, a compatibility specification is proposed as the most effective method of defining equipment requirements for a synchronized network.