ZyXEL Communications ZyWall ATP series User Manual page 241

See the following table for a comparison between 2G, 2.5G, 2.75G, 3G and 4G wireless technologies.
Table 99 2G, 2.5G, 2.75G, 3G, 3.5G and 4G 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.
4G/LTE Packet- The LTE (Long Term Evolution) standard is
switched based on the GSM and UMTS network
technologies.
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 Zyxel Device with multiple WAN interfaces must be on
different subnets.
Chapter 9 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).
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DATA
SPEED
Slow
Fast