| 摘要 |
A data network comprises a first and a second location, transmitting means at the first location for transmitting a data item including a time-stamp corresponding to the time of transmission of the item and receiving means at the second location for receiving the data item, for reading the time-stamp and for calculating therefrom and from the current time the time elapsed between transmission and receipt of the data item, characterised in that each location comprises a Global Positioning System receiver 12 for providing a synchronised time signal to the transmitting or receiving means. The invention also provides a method of measuring data transit time between two locations in a data network particularly an ATM network. |
