Description

Feature name

SubscriberDetermination

Applicable contexts

SIP service

SAS Support

No

Prerequisite features

DetermineCallType

The Subscriber Determination feature is a pre credit check feature early in the feature list (but always after the emergency number feature). The feature inspects the SIP INVITE to determine the subscriber address for this session and set the Subscriber session state field.

It determines the subscriber address either by:

  • returning the value already stored in the Subscriber session state field; otherwise

  • returning the value of the P-Served-User header (if that header is present); otherwise

  • analysing the FROM or RequestURI headers, depending on the call type:

    • moc: subscriber address is the URI in the FROM header

    • mtc: subscriber address is the URI in the RequestURI header

    • networkinitiated: subscriber address is the URI in the FROM header

The feature will string the parameters from the URIs in case some is present.

Leg Manager inputs

Leg Name Type Format Description Behaviour if null/invalid

calledParty

InviteRequest

org.jainslee.resources.sip.SipRequest

See EasySIP javadoc

The invite to be sent to the called party

Runtime exception handled by feature runner

Session state inputs and outputs

Inputs

Name Type Format Description Behaviour if null/invalid

CallType

com.opencloud.sentinel.common.CallType

One of: MobileOriginating, MobileTerminating, MobileForwarded, NetworkInitiated, EmergencyCall

Session type of this call

Subscriber will not be determined unless it can be determined from PServedUserHeader

Subscriber

String

SIP URI

Check the subscriber is not already set before proceeding

Subscriber determination will take place

Outputs

Name Type Format Description

Subscriber

String

SIP URI

The subscriber address

Error scenarios

Scenario Handling

Called Party leg Invite Request is null or does not contain Subscriber address

Report featureFailedToExecute

Feature responses

Response Reason

featureFailedToExecute

Invalid subscriber, if the feature was unable to determine any sensible subscriber address in any of the above ways

featureHasFinished

feature has finished

Configuration

This feature cannot be configured.

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Sentinel Express Version 4.0.0