NMS TCAP supports one or more applications with service access points, or SAPs. One SAP is defined for each application that uses the TCAP service. At initialization, applications bind to a particular SAP by specifying the SAP ID. Each user SAP is associated with a single SCCP subsystem number. All TCAP messages destined for a particular subsystem number are routed to the application bound to the SAP associated with that subsystem number.
SAPs are shown in the following illustration:
Note: The number of SAPs and the characteristics of each SAP are specified at TCAP configuration time. Refer to the NMS SS7 Configuration Manual for more information.