CLOCK SYNCHRONISATION

摘要

In a telecommunication network, a method of determining the accuracy of the real time clocks associated with each element of the network is disclosed. The method comprises sending a marker signal at a predetermined reference time along with the traffic signals to one or more elements in the network and arranging the element to record the time of the arrival of the marker signal using its clock. The recorded time is then compared with the reference time at the network management centre so as to determine the accuracy. In order to correct an inaccurate clock a message signal is sent so as to cause the clock to be adjusted by the difference between the reference and its recorded time.