Ok, so, you were right, I was in lone worker mode. When I say the green light starts blinking what I mean is when I ppt on the hd1 it lights up on the vertex (on site radio) as if there is activity on the channel but no audio. When I ppt on the vertex I get the audio on my hd1. Also, the channel is set to allow tx and STILL no audio. I'm gonna go through each PL code one by one which is a huge pain in the ass but, short of buying a vertex cable and software, this is what I have to work with. Thanks again for your continued help!