The MMTelStodTriggerAnchor feature handles the transfer request and route it to the previous bound session .

Feature Cheat Sheet

B2BUA Instance SAS Support Originating / Terminating Point(s) in Session Plan Network Operator Data Subscriber Data Stateful or Stateless POJO Feature or SBB Feature Other notes

Stod

No

Originating

Stod_SipAccess_SessionStart

Yes

Yes - subscriber data is from the HSS

Stateless

SBB Feature

Prerequisite Features

  • SubscriberDataLookupFromHssFeatureSbb

  • MMTelStodBind

  • MMTelStodEnabled

Session Input Variables

Session State variable name Type Comments
RegistrationRecords

Complex

Registration Records contain the public IMPU

Subscriber

String

The subscriber Id

StodIsEnabledForUser

boolean

Is the STOD enabled ?

Statistics

MMTelStodTriggerAnchor statistics are tracked by the sentinel.volte.sip SBB and can be found under the following parameter set in REM:
SLEE-Usage → sentinel.volte.sip service → sentinel.volte.sip SBB → feature → MMTelStodTriggerAnchor
or with rhino-stats:
"SLEE-Usage.Services.ServiceID[name=sentinel.volte.sip,vendor=OpenCloud,version=4.0.0].SbbID[name=sentinel.volte.sip,vendor=OpenCloud,version=4.0.0].feature.MMTelStodTriggerAnchor"

Name Incremented when…​
 Started

the feature runs

 FailedToStart

Sentinel VoLTE encounters an error while attempting to start the feature

 IssuedWarning

a non-fatal problem is encountered and the feature issues a warning

 FailedDuringExecution

a fatal problem is encountered and the feature cannot execute correctly

 TimedOut

the feature takes too long to complete and Sentinel VoLTE aborts execution

FiredIncomingRequestEvent

the transfer INVITE is sent to the session to be transfered.

Behaviour

The feature handles the transfer request and route it to the previous bound session.

The feature retrieves the existing session based on the IMPU from the registration records and fires an internal event, routing the transfer request to the previous bound existing session. If the existing session is owned by another operational node in the cluster, the transfer request is proxied to that node. 3 == Source

For source code information see MMTel Session Transfer Source Code

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Sentinel VoLTE Version 4.0.0