1 General objectives
2 Digital technology
3 Service types
3.1
Bearer
services
3.2
Teleservices
3.3
Supplementary
services
4 Architecture common to
all digital systems
4.1
Base station layout
4.2
Channel
design
4.3
Network
architecture and assignment of functions
5 Incorporation of
externally developed specification material
6 Digital cellular systems
and their enhancements
6.1
GSM
6.2
TIA/EIA-136
TDMA
6.3
TIA/EIA-95
CDMA
6.4
PDC