Not that I am aware of.
You could have a static room and either let the particiants manually dial up the room,
have a manual supervised job to add the participants to that room (via tms-ccc or mcu)
Or maybe write your own script accessing the mcu api.
If no one else has a better answer, you might want to think of a feature request, I would +1 on that one.
Also thinkt he auto generated number range for the mcus is far away from optimal, ...
also a randomization over these numbers could be handy, ...