After reading through several threads it seems that there are some issues with Unitrunker and some P25 systems. I noticed several items in the past two days that may help to shed some light on the problems. The P25 system that is Motorola in my area decodes instantly. The P25 system that is Ma/Com does not and shows no signal. However if the properties page is viewed while sitting on the Ma/Com system there is a bunch of data there. It lists the NAC as 000 and the Modulation switches back and forth betwwn CQPSK and C4FM. It also lists a number of features as available or suppported. Hopefully this information helps to further the project.