For each real-time text (RTT) functionality, can the messages be identified (excluding special cases)?

Tests

1. 17.4.1

   For each real-time text (RTT) functionality, do the messages respect these conditions?

   Received and sent messages are separated in the presentation;
   The presentation identifies the nature of the message (received or sent);
   The nature of the message (received or sent) is accessible to assistive technologies.
2. 17.4.2

   For each real-time text communication functionality used with a two-way voice communication functionality that identifies the speakers, do the messages respect these conditions?

   The presentation enables the authors of the messages to be identified;
   The identification of the author of the message is accessible to assistive technologies.