First, have you reset a system after you assigned key code for IP Trunks usage? Second, have you added Networking key code? What kind of Networking are you using and what Emulation, SL-1 or something else? Thirdly, can you tell us, please, what Trunks numbers in your BlocB and how you programmed your Destination code and Routing? There is much, much more but at least something.