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Yeah, the TDMA is 30 millisecond time slots. For P25, yes, for P25 it is, but for some other systems like Tetra, it's a little bit different. But I'll get into that in a second. So in the greater Toronto area, most of North America, the dominant system that they have is the Motorola Type II system. And more recently, a Motorola Type II Phase II system. So that's just a fancy way of saying that what you're doing is you're doing FDMA, so you're doing both frequency division multiple access while at the same time, excuse me, Motorola Phase I used FDMA, frequency division multiple access. We're split it in half and Phase II uses TDMA, time division multiple access to split the channel in half. So that's the difference between a Motorola Phase I, 700 or 8.