| 摘要 |
The method synchronises pulse frames in the digital transmission of information from a first part of a telecommunications system to a second part. The telecommunications system is made up of several partial systems connected together which are preferably at different locations. In the first part, a first time difference (delta t1) between the frame sync. pulse (FR1) of the first part and the frame sync. pulse (FR2) received from the second part is determined and transmitted to the second part. In the second part, a second time difference (delta t2) between the frame sync. pulse (FR2) of the second part and the frame sync. pulse (FR1) received from the first part is determined. The time taken for the signal to get from the first to the second part is determined from the sum of the first time difference and the second time difference. Finally the frame synchronisation pulse of the second system part is delayed by a time which is equal to the difference between the first time difference and the signal cycle time (delta T). |
