| 摘要 |
A system for providing to users of data communication services access to a communication network providing these services, includes an edge node of the communication network providing these services as well as a packet network, such as, an ethernet connecting the users to the edge node. The packet network is equipped with operation and maintenance procedures for preserving edge connectivity over the packet network. The edge node has associated therewith a backup edge node providing access to the communication network. Preferably, the backup edge node is reachable by the users via the packet network by using an address common to the edge node and the backup edge node associated therewith. In the presence of failure of the edge node, connection is established between the users and the backup edge node by applying the operation and maintenance procedures. Preferably, this, occurs by using the address common to the edge node and the associated backup edge node.
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