ABSTRACT
The switching machine is interfaced with transmission systems or with other machines, in case at a lower level, through input/output interfaces. The architecture of large switch fabrics is complex, due to the need of finding a tradeoff between the ability of creating whatever permutation between input and output with fast switching times and using simple control algorithms and the need of avoiding a huge hardware structure with great costs and low reliability. In all the switching machines that are deployed in the telecommunication networks, there is a part of the machine devoted to transfer the signal from the input port to the correct output port. In dynamic switching applications, the switching fabric is continuously involved in a fast series of state changes, never remaining in the same state for a long time. Naturally, the performance of such a time division switch is strongly dependent on the type of bus used inside the switch.
