SIP Feature Capabilities

The ATCF can announce a feature capability in a message by transporting the information in the Feature-Caps header, which is supported by the OCSBC.

The behavior of the two anchoring points, ATCF and ATGW, is defined by 3GPP in Release 12 of Technical Specification TS 24.237. Oracle Communications developed these functional entities based on the initial version of TS 24.237 Release 10, and has added the sip-feature-caps configuration element to align with Release 12. The element has three parameters:

state — The value "enabled" triggers the feature and adds the Feature-Caps header to messages. The default value is "disabled".
atcf-management-uri — identifies the feature capability indicator that will be used to transport the ATCF management URI. Possible values are "management" and "psi". The default value is "management". When the value is "management" and the value of state is "enabled", the Feature-Caps header “g.3gpp.atcf-mgmt-uri” is added and the value is the value of atcf-psi-dn in the sip-config configuration element. When the value is "psi" and the value of state is "enabled", the Feature-Caps header “g.3gpp.atcf-psi” is added and the value is the value of atcf-psi-dn in the sip-config configuration element.
atcf-alerting — The value "enabled" adds the Feature-Caps header to messages and turns on the alerting feature. The default value is "disabled".

When state is set to “enabled”, atcf-management-uri is empty, and atcf-alerting is set to "disabled", then the Feature-Caps header is added with:

g.3gpp.atcf : value is configured STN-SR in sip-config
g.3gpp.atcf-mgmt-uri: the value is atcf-psi-dn in sip-config
g.3gpp.atcf-path: value is the ATCF URI for terminating requests
g.3gpp.mid-call capability indicator

When state is set to “enabled”, atcf-management-uri is set to "psi", and atcf-alerting is set to "disabled", then the Feature-Caps header is added with:

g.3gpp.atcf : value is configured STN-SR in sip-config
g.3gpp.atcf-psi: the value is atcf-psi-dn in sip-config
g.3gpp.atcf-path: value is the ATCF URI for terminating requests
g.3gpp.mid-call capability indicator

When state is set to “enabled”, atcf-management-uri is set to "management", and atcf-alerting is set to "disabled", then the Feature-Caps header is added with:

g.3gpp.atcf : value is configured STN-SR in sip-config
g.3gpp.atcf-mgmt-uri: the value is atcf-psi-dn in sip-config
g.3gpp.atcf-path: value is the ATCF URI for terminating requests
g.3gpp.mid-call capability indicator

When state is set to “enabled”, atcf-management-uri is set to "management", and atcf-alerting is set to "enabled", then the Feature-Caps header is added with:

g.3gpp.atcf : value is configured STN-SR in sip-config
g.3gpp.atcf-mgmt-uri: the value is atcf-psi-dn in sip-config
g.3gpp.atcf-path: value is the ATCF URI for terminating requests
g.3gpp.mid-call capability indicator
g.3gpp.srvcc-alerting capability indicator

When state is set to “enabled”, atcf-management-uri is set to "psi", and atcf-alerting is set to "enabled", then the Feature-Caps header is added with:

g.3gpp.atcf : value is configured STN-SR in sip-config
g.3gpp.atcf-psi: the value is atcf-psi-dn in sip-config
g.3gpp.atcf-path: value is the ATCF URI for terminating requests
g.3gpp.mid-call capability indicator
g.3gpp.srvcc-alerting capability indicator