1 tosca_definitions_version: tosca_simple_yaml_1_0_0
4 A Serving-CSCF (S-CSCF) is the central node of the signalling plane.
5 It is a SIP server, but performs session control too. It is always located in the home network.
6 It uses Diameter Cx and Dx interfaces to the HSS to download user profiles and upload
7 user-to-S-CSCF associations (the user profile is only cached locally for processing reasons only
8 and is not changed). All necessary subscriber profile information is loaded from the HSS.
12 derived_from: tosca.nodes.SoftwareComponent
15 type: tosca.capabilities.Endpoint
16 relationship: tosca.relationships.ConnectTo
17 occurrences: [0, UNBOUNDED]
18 description: Connection with one ore more I-CSCF functions
21 capability: tosca.capabilities.Endpoint
22 node: att.nodes.ims.HSS
23 relationship: tosca.relationships.ConnectsTo