Dynamic Behavior of a Synchronization Control System for an Integrated Telephone Network

An integrated telephone network requires synchronization of digital signal streams arriving at each switching system with its switching points. A new synchronization control system for this purpose was already proposed by one of the authors and the final clock rate and stability criterion were discussed in the preceding material. Continuing with this discussion, impulse responses of the proposed control system applied to mesh networks are mathematically analyzed under the condition that all of the clock pulse generators have respective clock rate derivations from their nominal value. The conclusion was arrived at that the more stations included in a network, the shorter the time elapsed before the frame pulse phase disturbances are settled down to a steady state, although this tendency is rather gradual. The dynamic response of the synchronization control system applied to mesh networks, a ring network, a chain network, and an assumed worldwide network are computer simulated in linear and three-value clock rate control modes and the characteristic of the control system is clarified.