Modern digital synchronization system for big physical facilities is developed at BINP. It allows synchronizing the spatially distributed control devices with an accuracy of ±125 ps and low jitter (< 100 ps). Accurate time distribution and delay compensation is provided, as well as an ability to react to external events with a determined latency. Two modules are used in this subsystem: S-Timer and LTimer. S-Timer provides a synchronized 250 MHz clock signal with embedded events data through the optical link to nine L-Timers or S-Timers. L-Timer decodes the signal from the optical link and provides synchronization pulses to final control devices.