| 摘要 |
<p>The invention relates to an arrangement for synchronization of nodes in VDSL-systems, or more exactly, synchronization of optical VDSL-nodes (2) which share a common part of a cable in the access network between the subscribers (3) and the local station (1). The invention provides a time synchronization towards an external system (7), for instance GPS, which gives a time reference by which the different nodes can be synchronized. The synchronization reduces the near end cross talk between the VDSL-systems in the different nodes. Preferably respective node includes a receiver (6) for a synchronization signal and an internal oscillator with high stability to deliver a stable clock signal.</p> |
