| 摘要 |
A Session Initiation Protocol (SIP) server, 2, 3, 4 or 5, includes a routing function (21, figure 2) that utilises SIP messages to obtain the load conditions or other parameters of network nodes (which may be other SIP servers) that may be usefully taken into account when determining the route used in the network. Information concerning at least one of, load on node, overload conditions, link failures or route updates, are contained in the EVENT header of the SIP message. The SIP messages may be used to update routing tables. |
