Confusing is not the word for it. From what I've seen it all depends on your location on what TalkGroup your going to pickup during call outs. Unitrunker will be able to answer the questions on the patch. The 28481 will be the local Fire Dispatch channel for FW. Even though you heard radio checks for Key West, Panama City, that was the RDC. What they do is patch to all the local channels during callouts. But you will also just hear local fire dispatch on the 28481. Does that make since.