I'm hearing what I believe to be Motorola DVP voice security system on 6.925 almost constantly this evening (2100 UTC 30 July to 0500 31 July). I've heard it before, but this is almost constant transmissions between three stations. Anyone else hearing this? I live on the NC/SC line near Greenville, and the signals are running S7 - S9. There is fading, so it's not local. Maybe the mexicans I frequently hear have upgraded to DVP? Gubber-ment?