The TDMA stuff was OFD TAC 6 (TG 447). Per UT, it was active on the two TDMA channels/freqs on the Sarpy P25 system (855.1375 and 855.7125). Sure as shoot, there they were Slot 1 and Slot 2 banging away on 17 Nov as per my SDS100.Yup. On Sarpy it shows Douglas County Simulcast as a neighbor/peer in UT. I have seen/heard OFD TGs, both FDMA and TDMA (it was either OFD TAC 4 or TAC 6 that was using TDMA during an apartment fire a day or two ago) used and even heard Gretna Fire talking to Lifenet on ORION Metro Helo TG 342 the other day when they had to get a helo to a overturned truck out in west Sarpy. I can get more details once I get back home tonight.
All of this with my SDS100 and UT with a dongle sitting on 859.7875.
I don't actively monitor ORION, and I don't see TG 447 listed as TDMA in the database for ORION. Maybe it is? Maybe something else is going on?
I love a mystery.