hi, Monika, to answer you quiestion is simple – DX200 is platform for fixed and MSC, BSC , TETRA Nokia switches , because all this prodacts have the same hardware score. you can get inforrmation from: first source – online.nokia.com if you are registered user (NED – Nokia elect. documentation) , second one – ask guys on this site quiestions you are interested in or dx-200.narod.ru “форум” – russian site on dx200 , can write ENGLISH and get answers.