"Just did an eVision 4500 the other day, the projector is PJLink compatible, save yourself the hassle and use that instead"
That's a little bizarre.? I'm working with an E-Vision 7500 right now, and the protocol is completely different than the snipped the OP shared.
We've been connecting IP through HDBaseT connections off DM/DMPS units with zero issues...
? - Chip