ried, e.g. CBR, UBR, etc. Cross-connections for virtual paths and virtual Parameter Planning PDH interface SDH interface Protection Group Physical Trail Termination Point - PhyTTP ATM Interface + Access Profile Virtual Connections (VP and VC) Figure 3.73 Flowchart to configure interfaces channels are defined. With traffic comes the quality of services parameters (given in Section 3.3.3), which need to be defined. Interface Parameters Parameters required to configure the Iub, I-C, Iu-ps and Iur are defined. Configuration of the interfaces usually contains steps that include configuring the physical interface parameters, creating the radio network connection configuration parameters, creating the data connection networks, defining signalling and routing parameters, creating IP over ATM parameters, etc. Physical interface and ATM parameter creation has been dealt with in the above section. Connection configuration parameters include defining the parameters related to interface and control and the signalling unit (which is responsible for the function such as handovers, power controls, packet scheduling, etc., and is present in RNC), AAL2 user and signalling link VCIs, routing, etc. For the PS side, parameters are defined for interfaces, VCIs, VPIs, etc., apart from IP addressing, packet scheduling and routing, and forwarding/routing tables. An example is shown in Figure 3.74. Signalling Parameters The signalling data are carried by the SS7 signalling network. Before planning a signalling network, issues such as the type of signalling network, kind of signalling allocations scheme, restrictions related to the interconnection to other networks, application that needs to be carried, etc., should be addressed. Parameters generally include the defining type of network, identifying the signalling point codes, links and their IDs, standards used (e.g. ITU-T, JAP16, ANSI, etc.), VCs, VPs, VCIs, VPIs, etc. The routing of Interface ID (13) ATM Interface parameters VPI: (2) Value ATM Interface Identifier Physical Layer Trail T