ZyXEL Communications USG40 User Manual page 183

See the following table for a comparison between 2G, 2.5G, 2.75G and 3G wireless technologies.
Table 79 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 Services),
switched High-Speed Circuit-Switched Data
(HSCSD), etc.
2.75G Packet- Enhanced Data rates for GSM Evolution
switched (EDGE), Enhanced GPRS (EGPRS), etc.
3G Packet- UMTS (Universal Mobile
switched Telecommunications System), a third-
generation (3G) wireless standard
defined in ITU specification, is
sometimes marketed as 3GSM. The
UMTS uses GSM infrastructures and W-
CDMA (Wideband Code Division
Multiple Access) as the air interface.
The International Telecommunication
Union (ITU) is an international
organization within which governments
and the private sector coordinate
global telecom networks and services.
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.
To change your mobile broadband WAN settings, click Configuration > Network > Interface >
Cellular.
Note: Install (or connect) a compatible mobile broadband USB device to use a cellular
connection.
Note: The WAN IP addresses of a ZyWALL/USG with multiple WAN interfaces must be on
different subnets.
Chapter 8 Interfaces
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, 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).
ZyWALL/USG Series User's Guide
183
DATA
SPEED
Slow
Fast