Abstract: A time slot interchanger for connecting data samples between locations in a telephone system, including first and second data memories for storing and transmitting data samples, a number of cross point switches, a first data bus for connecting data between the first memory and a first one of the cross point switches, a second data bus for connecting data samples between the second memory and a second one of the cross point switches, and a number of third buses connected between one of the cross point switches and a different one of the locations. The interchanger also includes a channel or control memory for storing instruction addresses for addressing the data memories and the cross point switches. The interchanger also includes a cross point control for controlling the connections of the first and second buses to the cross point switches and a time slot counter for addressing the channel or control memory, and the data memories.