Hi Bodo ,
Yep your right selcal has nothing to do with FS itself,but they do use it on vatsim at least over the atlantic i have heard it although never got a chance to use it myself yet,
Strange thing was the last time i heard it on vatsim the other pilot contacted Gander oceanic and then Gander said they were going to test the selcal which they did and the pilot came back on saying he received it fine,what i didnt understand was i was able to hear it too,
I was always under the impression if ATC used selcal to contact an aircraft only that aircraft would be able to hear it in the cockpit as the selcal unit will reject the signal if it doesnt match the code in your receiver,so only the aircraft with that certain code should hear it,maybe its a limitation of fsinn or SB im not sure will need to find out about that.
From what i have read up on it appears that they only use the letters A-O and dont use I,N,O which gives them possibility of around 10920 unique codes,which means that more than one aircraft can have the same code which is why ATC nowadays make sure both the callsign and selcal are correct to make sure it is the right aircraft that responds
It seems most of the TITAN aircraft have the selcal AB-CD for some reason.
I personally dont fly the CS767 as i have the LDS so am not that bothered if it gets changed or not,dont want to cause you more work than is nessescary
But if you did feel bored one day Bodo i looked up a few that i dont think are in Globes fleet ,its almost impossible to find codes that arent already in use,out of 7 i only found one but didnt search for that long as it wasnt that important
Heres the 7
GH-FK
GH-FL
GH-FM
GH-FP
GH-FQ
GH-FR
GH-FS
And heres the details of each code and which aircraft uses it today in real life..
GH-FK
GH-FL
GH-FM
GH-FP
GH-FQ
GH-FR
GH-FS
Seems the titan reg nos N601TA-N607TA dont through up any selcal codes
I will leave it up to yourself and management dept to decide if you want to change them or not
Regards Terry