GSM原理介紹(英文版)(ppt 34頁)

GSM原理介紹(英文版)目錄：
一、GSM900/DCS1800
二、The GSM Network & Air Interface
三、Technical Basics
四、Speech Coding
五、Types of Channel
六、Making a Phone Call

GSM原理介紹(英文版)內容摘要：
GSM / DCS1800 Functionalities
1.Speech Services
2.Data Services
3.Short Message Services (SMS)
4.Supplementary Services
5.Subscriber Identity Module (SIM)
6.Security Function

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