Sentinel includes many system features for SIP networks which handles default system behaviour. These features are run using system pre and post execution scripts, before and after the user features on the same execution point with the same triggering event.
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B2BUA Feature — Performs B2BUA Behaviour, setting up an outgoing dialog and forwarding SIP Messages between the dialogs.
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B2BUA SCUR Features — Provide default session charging behaviour for Sentinel SIP as a B2BUA.
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B2BUA IEC Features — Provide immediate event charging for Sentinel SIP as a B2BUA.
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B2BUA ECUR Features — Provide event charging with unit reservation for Sentinel SIP as a B2BUA.
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Session Refresh Feature — Periodically instructs all INVITE dialog legs to refresh.
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SIP Downstream Forking Feature — Handles a SIP call forked downstream by the S-CSCF, an application, or other UAS.
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Subscribe Downstream Forking Feature — Handles a SIP subscription forked downstream by the S-CSCF, an application, or other UAS.
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SDP Comparison Feature — Updates charging information with the OCS when the media streams of a session have changed.
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SDP Monitor Feature — Keeps track of SDP offers and answers on a leg.
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Remove Headers From Outgoing Messages Feature — removal of headers from outgoing messages based on configuration.
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SDP Rewriter Feature — Rewrites SDPs to avoid conflicts between legs.
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Sequential Forked SDP Mediation — Ensures that the SDPs in responses to sequentially forked invites are delivered as UPDATES , not as 183s.
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Max Call Duration Feature — Monitors the call duration and terminate the call if the maximum time has exceeded.
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AVP CDR Feature — Writes a Call Detail Record in AVP format when the session ends.
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SIP Do Not Charge Feature — Disables charging of the current session.
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Diameter Service Info Feature — Constructs
IMS-InformationandPS-InformationAVPs for CDRs and Credit-Control-Requests. -
Determine Cause Code Feature — Determines the value to be used for the
Cause-CodeAVP in theIMS-InformationAVP -
Record Timestamps Feature — Records the time at which the initial INVITE and the associated final response were received.
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Store Header Info Feature — Records in session state various pieces of information required by other features.
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Extract Network Info Feature — Records in session state the MCC and MNC values for the subscriber parsed from PVNI and PANI headers.
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External Session Tracking — Creates and maintains records in the Rhino Session Ownership Facility for all SIP legs that have been flagged for tracking.
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Determine Session Replication — Sets up triggers in the Sentinel SIP service, that cause session replication to begin at certain points in a call.
