I have an option 81C and we are going to have another new office in another location a few miles away. What PBX equipments would I need to have to the new office to be able to be connected to our existing 81C in our other office? Would I have to buy an option 11C? What type of T1 would I need? A point to point T1? What type of PBX would I need? A fiber remote cabinet? or am I incorrect? Thanks for the help