most cmdrs use a discord or steam group room voip methinks as the game uses peer to peer type networking coms "connecting your call then disconnecting as it were like an old school tel operator...…. which is far from great
where as discord or steam etc host the voip room {instance} constantly via there central servers so is a far more reliable coms method
you can always copy the nasa beep sound for transmit end
best you can do for elite coms is ensure upnp is enabled in both router an pc either way but your still limited to peer to peer reliability which can be notoriously bad