| 摘要 |
A network element is provided for receiving receives message signals and reading the synchronization status messages contained therein. The network element transmits the message signals to a central network management facility which selects one of the message signals as a timing reference based on the synchronization status messages and based on stored information about the structure and configuration of the network. The network management facility then notifies the network element of the selection. The network element derives a clock signal from the selected message signal and uses this clock signal to adjust an internal clock generator. Because the network management facility also has information about parallel transmission paths, the creation of timing loops is effectively prevented.
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