Table 21 2G, 2.5G, 2.75G, 3G And 3.5G Wireless Technologies - ZyXEL Communications NBG410W3G User Manual

The actual data rate you obtain varies depending on your 3G card, the signal
strength of the service provider's base station, your service plan, etc.
If the signal strength of a 3G network is too low, the 3G card may switch to an available 2.5G
or 2.75G network. See the following table for a comparison between 2G, 2.5G, 2.75G, 3G and
3.5G wireless technologies.

Table 21 2G, 2.5G, 2.75G, 3G and 3.5G Wireless Technologies

MOBILE PHONE AND DATA STANDARDS
NAME TYPE
GSM-BASED
2G Circuit- GSM (Global System for Mobile
switched Communications), Personal Handy-
phone System (PHS), etc.
2.5G Packet- GPRS (General Packet Radio
switched Services), High-Speed Circuit-
Switched Data (HSCSD), etc.
2.75G Packet- Enhanced Data rates for GSM
switched Evolution (EDGE), Enhanced GPRS
(EGPRS), etc.
3G Packet- UMTS (Universal Mobile
switched Telecommunications System), a third-
generation (3G) wireless standard
defined in ITU
sometimes marketed as 3GSM. The
UMTS uses GSM infrastructures and
W-CDMA (Wideband Code Division
Multiple Access) as the air interface.
3.5G Packet- HSDPA (High-Speed Downlink Packet
switched Access) is a mobile telephony
protocol, used for UMTS-based 3G
networks and allows for higher data
transfer speeds.
A. The International Telecommunication Union (ITU) is an international organization within which governments and the private sector
coordinate global telecom networks and services.
After you activate 3G on your ZyXEL Device, the 3G connection becomes WAN 2. Refer to
the Chapter 22 on page 345
along with the corresponding supported features.
To change your ZyXEL Device's 3G WAN settings, click NETWORK > WAN > 3G (WAN
2) or WIRELESS > 3G (WAN 2).
NBG410W3G Series User's Guide
CDMA-BASED
Interim Standard 95 (IS-95), the first
CDMA-based digital cellular standard
pioneered by Qualcomm. The brand
name for IS-95 is cdmaOne. IS-95 is
also known as TIA-EIA-95.
CDMA2000 is a hybrid 2.5G / 3G
protocol of mobile telecommunications
standards that use CDMA, a multiple
access scheme for digital radio.
CDMA2000 1xRTT (1 times Radio
Transmission Technology) is the core
CDMA2000 wireless air interface
standard. It is also known as 1x, 1xRTT,
or IS-2000 and considered to be a 2.5G
or 2.75G technology.
CDMA2000 EV-DO (Evolution-Data
Optimized, originally 1x Evolution-Data
Only), also referred to as EV-DO, EVDO,
A
specification, is or just EV, is an evolution of CDMA2000
1xRTT and enables high-speed wireless
connectivity. It is also denoted as IS-856
or High Data Rate (HDR).
for the type of 3G cards that you can use in the ZyXEL Device
Chapter 6 WAN Screens
DATA
SPEED
Slow
Fast
127