Help me in the difference of Anna, telemetry and "SV"

Hello, I wanted to know the difference of Anna, Telemetry and SV (in my case, I use in Portuguese, so the “SV”). I know that telemetry is basic information, Anna is the assistant, so I wanted to know the “SV”.

In English, it’s TTS, which is Text to Speech. I’ve never used it, so I’m not sure exactly what it does, but I think it reads out text that appears on screen during play, like quick chat notifications from other players.

TTS descriptions from FM7 and FH3: