Patent ID: 7620038
Filing Date: 2009-11-17
Classification: H04Q

Abstract:
1. A communication system comprising: a system bus for transmitting data signals; a time slot interchanger (TSI) circuit for interchanging time slots of data signals being transmitted on the system bus; and a hot swap logic circuit for selectively isolating the TSI circuit from the system bus, wherein the hot swap logic circuit is coupled between the system bus and the TSI circuit, such that data signals flow from the system bus, through the hot swap logic, to the TSI for interchanging, back through the hot swap logic, and back to the system bus, the hot swap logic allowing on-line insertion and removal of the TSI circuit, the hot swap logic circuit responsive to a transmit clock signal to clock respective signals from the hot swap logic circuit to the system bus, the hot swap logic circuit also responsive to the transmit clock signal to clock respective signals from the hot swap logic circuit to the TSI circuit, the hot swap logic responsive to a receive clock signal that is related by a predetermined phase to the transmit clock signal to clock respective signals from the system bus, and the hot swap logic responsive to the receive clock to clock respective signals from the TSI circuit to the hot swap logic circuit.