One and only
This can only work if there's just one robot, and preferably just for the manager. You can drive around the remote office, see who is in, see who is chatting to who, and cut in for a quick chat yourself. But once your employees have robots too, the system falls apart. Are they really at their desk, or is that just where they last parked their robot? How can you tell if they're chatting on the phone, if you can't see the handset glued to their ear? You can't even tell if they're actually working or just surfing Robot News Daily. Ultimately the damn thing is going to spend most of its time parked at its desk, so it's a waste of money.