1. The changing scene -again
2. From Pn Europen mobile tephone to global system for mobile communications
3. A Look over the fence
4. The development of GSM services and futures
5. GSM Telecommunication services
6. Short message service
7. Supplementary services
8. The subscriber identity module
9. New face 2++ functions
10. Roaming and call routing
11. Introduction to GSM Technology and Implementation
Appendix Coding of the default GSM alphabet
