The "User-Identifier" AVP

The "User-Identifier" Diameter AVP, which is of type Grouped, is defined by 3GPP (vendor ID 10415) and uses the AVP code "3102".

It has the MANDATORY flag.

It is part of the Send-Routing-info-for-SM-Answer, Alert-Service-Centre-Request, Report-SM-Delivery-Status-Request, Report-SM-Delivery-Status-Answer, MO-Forward-Short-Message-Request, MT-Forward-Short-Message-Answer, 3GPP-Subscriber-Information-Request, 3GPP-Subscriber-Information-Answer, Configuration-Information-Request, Configuration-Information-Answer, Reporting-Information-Request, NIDD-Information-Request, 3GPP-Device-Trigger-Request, 3GPP-Delivery-Report-Request, Data-Pull-Request, Data-Update-Request, Notification-Data-Request, ProSe-Authorization-Request, Reporting-Information-Request, Connection-Management-Request, MO-Data-Request, MT-Data-Request commands.

It is part of the Group-Report-Item grouped AVP.

It is a grouped AVP, which can hold the following nested AVPs:

< User-Identifier > ::= < AVP-Header: 3102, 10415 > 
* [ User-Name ]
* [ MSISDN ]
* [ External-Identifier ]
* [ LMSI ]
* [ Type-Of-External-Identifier ]