1. 3GPP TS 26.235, Packet switched conversational multimedia applications; default codecs.
2. 3GPP TS 26.236, Packet switched conversational multimedia applications; transport protocols.
3. 3GPP TS 26.114 IP Multimedia Subsystem (IMS); multimedia telephony; media handling and interaction.
4. 3GPP TS 26.234 Transparent end-to-end packet-switched streaming service (PSS); protocols and codecs.
5. 3GPP TS 26.346 Multimedia broadcast/multicast service (MBMS); protocols and codecs.