I still can’t get it to work.
It reads the ATC callsign embedded into the aircraft followed by the callsign. So in this example;
Speedbird SHT2C (with the SHT spelt out phonetically)
The callsign should be - “Shuttle 2C”
I can get something sensible if I put nothing in any SimBrief field other than the flight number. In that case I would get the embedded ATC name of the aircraft followed by that number, i.e. American1411
Very frustrating.
@Djorous I’ll give your method a try. Thanks.