Documents by G. Hellstrom
2000, RFC2793: RTP Payload for Text Conversation
2005, RFC4103: RTP Payload for Text Conversation
2006, RFC4351: Real-Time Transport Protocol (RTP) Payload for Text Conversation Interleaved in an Audio Stream
2021, RFC8865: T.140 Real-Time Text Conversation over WebRTC Data Channels
2021, RFC9071: RTP-Mixer Formatting of Multiparty Real-Time Text