6.2.1.1: ICT offering real-time voice must also offer real-time two-way RTT (this implies RTT interoperability wherever voice interoperates, covers devices without their own display that can connect to one and intermediate ICT, and multi-party RTT where multi-party voice exists). 6.2.1.2: voice and RTT must be usable at the same time. 6.2.1.3: one user operation must act on all requested or established media when setting up, answering, modifying (transfer, hold, participant changes) and ending a communication.
This control maps to 1 controls across 1 other frameworks. If you already hold one of them, the evidence you collected for it is the starting point here rather than new work.
Every mapping shown was judged rather than inferred from wording similarity, and the ones that failed review are published too. See the coverage reports and what was rejected.
The graph holds this control, the 1 it maps to, and the evidence behind each claim, over MCP and REST.