The "Service-Identifier" AVP

The "Service-Identifier" Diameter AVP, which is of type Unsigned32, uses the AVP code "439".

It has the MANDATORY flag, the MAY-ENCRYPT flag.

It is part of the Credit-Control-Request, Re-Auth-Request, Re-Auth-Answer commands.

It is part of the Charging-Rule-Definition, ADC-Rule-Definition, Service-Data-Container, Multiple-Services-Credit-Control, 3GPP2-Charging-Rule-Definition grouped AVPs.

It is part of the Diameter Credit Control Application application.

It is defined in the Diameter Credit Control Application specification.