ZyXEL Communications P-2812HNU-51c User Manual page 122

Chapter 5 Broadband
compose the network address. The prefix length is written as "/x" where x is a number. For
example,
2001:db8:1a2b:15::1a2f:0/32
means that the first 32 bits (2001:db8) is the subnet prefix.
3G Comparison Table
See the following table for a comparison between 2G, 2.5G, 2.75G and 3G wireless technologies.
Table 15 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.
122
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).
DATA
SPEED
Slow
Fast
P-2812HNU(L)-Fx Series User's Guide