H.225.0 Transport of Multiple Q.931 Information Elements of the Same Type Series H: Audiovisual and Multimedia Systems Supplementary Services for Multimedia Study Group 16
ITU-T Rec. H.225.0 forbids including multiple 4.931 information elements (IEs) of the same type in the same message. This Recommendation specifies the method of transferring duplicate 4.931 Ies in H.225.0.