I'm sure there is someone that is more knowledgeable about this than me. I am a college student at the University of North Carolina-Charlotte and while I was in the Belk Gymnasium, I noticed one of the employees' radios started ringing I guess something similar to I-Call on a Motorola trunked system. The employee then punched in a code on the keypad and answered the other person. The only systems listed for UNC-Charlotte are a LTR system and conventional frequencies. So, were they utilizing the LTR and if so, how can you monitor these transmissions?