Well you could use a "fake Aux Bus". Use an Aux that is not actually in use by that remote Carbonite. Meaning not actually going out an Output.
Now setup your Tallies to be events tied to that Aux --- IE Tally 11 is Input 1 on Aux 8, Tally 12 is Input 2 on Aux 8......etc.
Now you can setup some Custom controls -- or just send the XPT command but I find it easier to build custom controls -- That will set the Aux Bus the the Appropriate Input to trigger your tally.
Now you can build a custom control on the local carbonite to send to the remote device (set up as a RossTalk Generic Device and use the command to send it a CC).
If you want to do it from DashBoard then you can build a panel that sends the CC command to that remote Carbonite.
#Carbonite