This standard specifies the system composition and functions， services， interface and signaling， channel coding mode， equipment functions， requirements for equipment performance， numbering， network management and operation & maintenance system， CDR management system， requirements for synchronization and environmental requirements of general packet radio service （GPRS） subsystem for mobile communication-railway （GSM-R） （hereinafter referred to as railway GPRS system）.
　　This standard is applicable to system design， product manufacturing and test of railway GPRS system.

Foreword
1 Scope
2 Nomative Reference
3 Abbreviations
4 System Composition and Function
5 Services
6 Interface， Signaling and Channel Coding Scheme
7 Equipment Functions
8 Requirements on Equipment Performance
9 Numbering
10 Network Management and Operation Maintenance System
11 CDR Management System
12 Requirements on Synchronization
13 Environmental Requirements
Annex A （Informative） Main Equipment Composition Diagam of GSM-R System