VolteInterimCdr is a system feature that is responsible for writing interim Call Detail Records throughout the session.

VolteInterimCdr runs at various key points throughout a session and if any of its write conditions are met, it will create a new interim CDR based on session state, and write it out using the cdr-ra.


By default, Sentinel runs VolteInterimCdr as the very last feature in the post phase of almost every Sip or Charging related feature execution script and EndSession. For example:

featurescript SipEndSession-SysPost-Default {
    run VolteInterimCdr
    run MaxCallDuration
    run SessionRefresh


Feature script name


Applicable contexts

SIP service

Prerequisite features

None, but information from various features is used if available

Session state inputs and outputs


If any of these fields are unset the feature will skip writing them to the CDR file.

This feature uses the same session state fields as the Sentinel Interim CDR feature. This page will only discuss the additions to the fields described there.

Name Type Description Where set



The accepted terminating domain in a T-ADS scenario

MMTelWifiChargingFinalisation feature, SCCTADSParallelRouting feature


org.jainslee.resources.diameter .ro.types.vcb0.MmtelInformation

The MMTel-Information Diameter AVP

DiameterMMTelInfo feature



Contains subscriber information retrieved from the Registrar and HSS or Cassandra

IMSIDLookup feature, IMSIDLookupFromCassandra feature



Contains the Call Reference Number used in queries to the HLR

FetchMSRN feature


This features uses the information from the session state fields mentioned above and constructs a protobuf message out of it for output. See AVP CDR Format for the format of these messages.

Also see Charging Information for general information about the contents of CDRs and CCRs.

Note This feature only supports writing binary CDRs. If the cdr-ra is configured to write string CDRs the feature will fail to execute.

Feature responses

Response Reason


feature has finished

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Sentinel VoLTE Version 2.7.0