| Nowadays, modern telecommunication technology is developing at very fast speed. People require more and more advanced telecommunicated mode. That is, people want to telephone the others not only in office or home but also in any places, and that they also wish to communicate with others while they are walking or driving. Therefore mobile telephone gets a high-speed development and a extensive application.This thesis introduces the elementary knowledge of GSM, and discusses the design and implementation of GSM Portable Software for Mobiles. The part Man-Machine Interface of the Mobile Station is the main part of this thesis.We utilizes Finite State Machine as the basement of system design and realization, and SDL language and normal C language as the main developing environment which improves the software's running-speed and system resource's occupation. |