| 摘要 |
A method for achieving operational reliability in an overlayed network of service nodes is disclosed. The overlayed network of service nodes is connected to a public telecommunications network. In response to a party using a subscriber number to make a call, the public telecommunications network routes the call to a preferred service node. The preferred service node is capable of providing a plurality of services in response to such a call. If the preferred service node experiences a failure or is otherwise not operational, and does not respond to such a call, the public telecommunications network reroutes the call to a standby service node, which provides the same services as the preferred service node. |
