?– Diameter_credit_limit_reached 4012: This AVP indicates that the subscriber??™s account
has reached its limit; therefore, the requested service cannot be delivered.
?– Diameter_user_unknown 5030: The subscriber identified in the service request
cannot be found in the OCS.
?– Diameter_rating_failed 5031: This code indicates that rating was not possible
because the information provided to the rating function was either not valid or
incomplete; therefore, the requested rating could not be completed.
Online and Offline Charging in the IMS 195
Role-of-node When an application server (AS) or a CSCF identifies itself and its
functions for the purposes of charging, it also identifies its role in the associated session.
The values for this AVP are
?– 0 = Originating role
?– 1 = Terminating role
?– 2 = Proxy role (application servers only)
?– 3 = B2BUA (application servers only)
SDP-media-component The media used for an IMS session are described in this
AVP. The values can be
?– SDP-media-name
?– SDP-media-description
?– GPRS-charging-ID
SDP-media-description This parameter copies the media description line from the
SDP section of a SIP message. The media description lines describe the type of media
that the session is using. It is carried here as part of the charging function for the purposes
of billing to describe the media type used in the associated session.
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