A switch that has no ip? Hmm, is it just not configured with one, or is it not capable of having one configured? Strange that a switch could only be managed from a com port. I have seen one, so yea, I suppose that's what you got.
Sorry, I think you are outa luck, since you would have to have something plugged into the com port at all times, just to monitor it's status even if you could write the plugin, so that would kinda suck.