Visual indication of Audio with RTT (from clause 13.4.7 of TR 103 708)
Clause 6.2.2.4 has a requirement to show audio activity in a call including RTT. The only change proposed in this clause is to change "two-party" to "conversational real-time" in the first line of the clause for the reasons indicated in Issue #78.
The results of these proposed changes can be previewed in Annex A of TR 103 708 ( tr_103708v010101p.pdf tr_103708v010101p.docx).