from this MGW. The binding ID has valuable meaning only in the network element, where it is reserved. It has to be unique inside the MGW. User Plane Analysis in the MSS A user plane analysis is a new analysis introduced in the MSS system. It consists of several subanalyses, which can be chained and linked to different kinds of results. The structure of one analysis is presented in Figure 4.33. A user plane analysis, like the extended preanalysis and attribute analysis, has attributes to be analysed. Each attribute can be analysed in one or more subanalyses, and the subanalyses can be chained. An attribute is a call-related variable. The value of the attribute is the value of the variable. In subanalysis, there can only be one attribute, but the handling of the different values of this attribute may differ. For example, the analysis may continue from the next subanalysis with one value of the attribute, but with some other value the analysis goes to the final result. The following describes the relationship between the six phases of user plane analysis and its results: Call mediation node. This indicates whether the MSS should act as a transit switching node (TSN) or as a call mediation node (CMN). Interconnecting backbone network connection characteristics. This indicates what type of bearer is used between two MGWs controlled by one MSS. Preceding user plane destination. This identifies the user plane destination for the incoming side. Succeeding action indicator. This indicates what bearer establishment method is used at the outgoing side. Succeeding backbone network connection (BNC) characteristics. This indicates what type of bearer is used at the outgoing side. Succeeding user plane destination. This identifies the user plane destination for the outgoing side. Other Analyses in the MSS The other analysis services provided by the MSS are actually no different from the services supported in the MSC (GSM environment). Those basic routing function analyses (mainly call control related) include: User Plane Detail