1995: IS95A 9,6kbps
1998: IS95A 115,2 kbps
2000: CDMA2000 307,2 kbps (1. Heavier voice service capacity, 2. Longer period of standby time)
2003: 1. CDMA2000 3x, 2. CDMA2000 1x EV, 1x EV-DO, 1x EV-DV
BTS – Base Transceiver Station
BSC – Base Station Controller
MS – Mobile Station
MSC – Mobile Switching Center
HLR – Home Location Register
SMS-SC – Short Message
Service – Service Center
STM – Synchronous Transfer Mode
PDSN – Packet Data Serving Node
AAA – Authentication, Authorization, and Accounting
Home Agent – Mobile IP Home Agent
CN-CS – Core Network-Circuit Switching
CN-PS – Core Network-Packet Switching
PCF – Packet Control Function
FA – Foreign Agent
PPS – Prepaid Server
SCP – Service Control Point
Traffic channels: different users are assigned unique code and transmitted over the same frequency band, for example, WCDMA and CDMA2000.
Traffic channel: different time slots are allocated to different users, for example, DAMPS and GSM.
Traffic channels: different frequency bands are allocated to different users, for example, AMPS and TACS.