Patent ID: 7301941

Claim:
A digital cross connect comprising: plural switching stages, each stage having plural switches receiving plural frames of time multiplexed input data and switching the data in time and space; and configuration storage at each switch configured to store a primary time/space configuration table and a standby time/space configuration table for the switch, all switches switching configuration between the primary time/space configuration and the standby time/space configuration in frame synchronization at the start of synchronized data frames by synchronizing switches of successive stages to a configuration select signal propagated from at least one switch of an input stage, wherein configuration switching is initiated by a prepare-to-switch signal propagated from a master switch to all switches of an output stage and the input stage, the at least one switch of the input stage then propagating the configuration select signal, and each switch is configured to switch between the primary time/space configuration table and the standby time/space configuration table in response to the configuration select signal.