You need the address of the shop that operates the system so you can get their permission to use the system and properly program the radio for you. LTR is a simple system but not that easy to "guess" the programming. Just because the system may be licensed for 5 channels doesn't mean that the repeaters are numbered 1 - 5. They may be randomly be numbered 2, 4, 7, 11, 19 so when the system tells your groups radios to go to 11 you have to have the correct freq programmed into your radio's ch 11 position. You also need to know if the system is inverted or not. These things are done to prevent false signals from other nearby LTR systems but also to frustrate bootleggers. (not pointing fingers). If you are trying to work with more than one group with different home channels then you may have to program them in separate zones. The system might also be a PassPort or PassPort type protected system so you might need a LTR radio with imbedded PP-ESN or option board and you will also need PP-LTR software to program the PP functions and the ESN will also need to be activated on the system. Most LTR radios are pass word protected so you probably won't be able to read another radio to duplicate the information. There are other reasons why you need the system operator to program the radio.