Lpe
Well, if you want to put it on the system to talk, you need to go find the system administrator. IF you are talking about monitioring only, first off you need to know what type of system your area is using. Since you are considering an LPE , we shall assume EDACS, however is it Analog or digital, if they do run Provoice, is it encrypted?? There is no a systems keys per se for EDACS, but there is an ESK key that may hinder some things. BUt first take into consideration, that youl will need software, program cables and rib and a very good idea of what you need to do, because while you can truly program an EDACS radio to not transmit or affiliate, unless you have an idea of what your doing, you could be the cause of problems to yourself and the system.
Unless they are ProVoice, I would recommend getting a scanner, besides which you can smonitor other types of systems and have a lot more storage. The cost and issues between just using a scanner usually add up. Also if you are an employee, many cities have a policy against personal radios on a system, and even a recieve only one would possibly qualify you for unemployment.. just something to consider.