I looked in engine 63 and medic 63 today and did not see an edacs radio mounted in the rigs. I also didn't see a portable edacs radio inside either rig, but that of course doesn't mean that there wasn't one stashed somewhere in the rig out of sight.
All of their rigs only have one 800mhz antenna mounted on the roof. So I am pretty confident that they are being patched. I had heard once before that all the comms between them were patched, but I have never confirmed that.
Dave