I'm running 4/536 and the Con+ icon not showing up while trunking. It will show the Con+ will in Conv and custom search. Something changed somewhere in the past few firmware updates.
I'm seeing it on the two MotoTrbo systems I'm scanning. Con+ shows up on the display and on Siren when connected to my 536HP. The only time I don't see it is when it can't find the control channel.
It does not show up ARC536 Virtual Control.
The NX indicator doesn't shop up on Siren or ARC536.