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