I have trouble understaning the contents of a conversation between dispatchers and train crews when they are using CTC. It is mainly because the only railroad within range of my scanners is the Union Pacific Livonia Subdivision and I hardly ever hear them. I don't know if this is a technical issue or what, but it would be awesome if I could hear their traffic. The BNSF Lafayette Subdivision passes through the outskirts of my town and they use TWC (which I am pretty familiar with.) For whatever reason; I am able to hear the tower transmissions from Kansas City Southern and Canadian National frequently and they both use TWC. What gets me is that they are further from me than the UP Livonia Sub. Anyway, the reason why I am posting in here is I want to better understand what exactly is being said when CTC is in use. I have searched the internet to better understand, but I found nothing. DTC is not used in my area but since it is so similar to TWC, I think I could pick it up easily. Somone, anyone, please help.