BITS scheme of rail transit transmission system Rail transit transmission system network synchroniza



The rail transittransmission subsystem based on SDH transmission mechanism needs networksynchronization to ensure that all digital devices in the communication networkwork at the same frequency, control sliding, reduce and suppress jitter, driftand other damages such as phase hopping, etc., and reduce SDH pointeradjustment, so as to ensure the normal work of various subway communicationservices.


The systemadopts a set of network synchronous equipment of the control center equipment,which serves as the transmission system line synchronous equipment and providesstandard synchronous timing reference signals to the transmission equipment andtime synchronization system.