1
Scope
2 References
3 Terminology
4 Abbreviations
5
Public data
transmission services
5.1 General aspects of data
transmission services
5.2 Technical characteristics of
circuit switched data transmission services
5.3 Technical characteristics of
packet switched data transmission services provided by PSPDN or ISDN
5.4 Technical characteristics of frame
relay data transmission services provided by FRPDN
5.5 Interworking between PDNs and the Internet
6 Optional user facilities
6.1 Data transfer related facilities
6.2 Facilities to convey user data
other than during the data transfer phase
6.3 Addressing related facilities
6.4 Routing related facilities
6.5 Charging related facilities
6.6 Protection related facilities
6.7 Data link layer capabilities
6.8 Multipoint related facilities
6.9 Other optional user
capabilities/facilities