LCNs, as existed in EDACS, do not exist in P25. LCNs, in terms of the math done to determine a frequency based on the base/offset table, does exist but it is no different than what is done on Motorola P25 systems. You can program an EF Johnson radio to use a Harris system, but I don't know if Harris proprietary features such as patch and simulselect are supported by EF Johnson radios.