The XRT8001 WAN Clock is a dual-phase-locked loop chip that generates two very low jitter output clock signals that can be used for synchronization clocks in wide area networking systems. The XRT8001 has preprogrammed multipliers and dividers that are selected via the serial port. It generates two integer multiples of 8kHz, 56kHz, and 64kHz while locked onto an incoming reference of 1.54MHz (T1), 2.048MHz (E1), 8kHz, 56kHz, or 64kHz