7.2.58 Early-Media-Description AVP

32.2993GPPCharging managementDiameter charging applicationsRelease 17Telecommunication managementTS

Tools: ARFCN - Frequency Conversion for 5G NR/LTE/UMTS/GSM

The Early-Media-Description AVP (AVP code 1272) is of type grouped and describes the SDP session, media parameters and timestamps related to media components set to active according to SDP signalling exchanged during a SIP session establishment before the final successful or unsuccessful SIP answer to the initial SIP INVITE message is received. Once a media component has been set to active, subsequent status changes shall also be registered.

It has the following ABNF grammar:

<Early-Media-Description>:: = <AVP Header: 1272>

[ SDP-TimeStamps ]

* [ SDP-Media-Component ]

* [ SDP-Session-Description ]

Media can be considered as inactive in range of situations, such as the listed below according to RFC 3264 [408]:

– Media marked with "a=inactive" attribute.

– Media offered with zero bandwith.

In contrast, media with directionality marked as "a=recvonly", "a=sendonly", "a=sendrecv" shall be considered in state "active" and thus, it may be exchanged in one or both directions.