The "SIP-Item-Number" AVP

The "SIP-Item-Number" Diameter AVP, which is of type Unsigned32, uses the AVP code "378".

It has the MANDATORY flag.

It is part of the 3GPP-SIP-Auth-Data-Item, SIP-Auth-Data-Item grouped AVPs.

It is part of the Diameter Session Initiation Protocol (SIP) Application application.

It is defined in the Diameter Session Initiation Protocol (SIP) Application specification.