Yes, the big Furman box has a talkback switch on each box. It can be routed to *) Only the control room, or *) To control room AND every other box, via an internal jumper in the brain. Then you patch the talkback-from-boxes into a desk fader, and you are REALLY good-to-go.
Also each box has a talkback return pot...this can come from your desk's talkback/cue output, and if the jumper is switched, will also hear the talkback from all other boxes.
There is also an effect send and return on each box.
Much more power, TEN more inputs, heavy cable with Centronics 50 pin connectors.
Built-in TT and 1/4" patchbays on the front of the Brain.
It is so much better, I almost get physically ill now when I have to use the small system.