| 摘要 |
In a network of SDH equipments (e.g. synchronous multiplexers add-drop or SMA) for the communication of signals comprising data, a synchronisation signal for synchronising the data and a synchronisation status message (SSM) indicating the quality of the source of the synchronisation signal, when a synchronisation signal is output via a synchronisation signal output (SSO) to a stand-alone synchronisation equipment (SASE) for conditioning and subsequently input via a synchronisation signal input (SSI), the SSM information may be lost. The invention provides means for associating, within the SDH equipment, the relevant SSM with the synchronisation signal input at the SSI. <IMAGE> |
