Patent ID: 6961343

Claim:
A cross-connection switch comprising: first memory means for storing data indicating switching information of a time slot at an address to which time slot information is assigned; second memory means for storing data of each time slot of an input frame in time slot units, inputting data stored in said first memory means, and outputting the data stored at the address specified by the data as time slot data of an output frame; counter means for counting a number of input time slots of an input frame in synchronization with the input frame, and outputting the count value as a read address and a write address respectively to said first memory means and said second memory means; and selector means for switching data of a time slot directly input from an input line with data of a time slot read from said second memory means and outputting a switching result, wherein said selector means is controlled to output time slot information not to be switched as time slot data of an output frame without performing a process on the information by inputting information read from said first memory means as a selector signal to said selector means, and to output time slot data read from said second memory means as time slot data of an output frame to be switched.