Chapter 10 Interface

10.7 Cellular Configuration Screen (3G)

3G (Third Generation) is a digital, packet-switched wireless technology. Bandwidth usage is optimized as multiple users share the same channel and bandwidth is only allocated to users when they send data. It allows fast transfer of voice and non-voice data and provides broadband Internet access to mobile devices.

"The actual data rate you obtain varies depending the 3G card you use, the signal strength to the service provider’s base station, and so on.

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 and 3G of wireless technologies.

Table 61 2G, 2.5G, 2.75G, 3G and 3.5G Wireless Technologies

NAME

TYPE

MOBILE PHONE AND DATA STANDARDS

DATA

GSM-BASED

CDMA-BASED

SPEED

 

 

 

 

 

 

2G

Circuit-

GSM (Global System for Mobile

Interim Standard 95 (IS-95), the first

Slow

 

switched

Communications), Personal Handy-

CDMA-based digital cellular standard

 

 

 

 

phone System (PHS), etc.

pioneered by Qualcomm. The brand

 

 

 

 

 

name for IS-95 is cdmaOne. IS-95 is

 

 

 

 

 

also known as TIA-EIA-95.

 

 

 

 

 

 

 

 

2.5G

Packet-

GPRS (General Packet Radio

CDMA2000 is a hybrid 2.5G / 3G

 

 

 

switched

Services), High-Speed Circuit-

protocol of mobile telecommunications

 

 

 

 

Switched Data (HSCSD), etc.

standards that use CDMA, a multiple

 

 

 

 

 

access scheme for digital radio.

 

 

2.75G

Packet-

Enhanced Data rates for GSM

 

 

CDMA2000 1xRTT (1 times Radio

 

 

 

switched

Evolution (EDGE), Enhanced GPRS

 

 

 

Transmission Technology) is the core

 

 

 

 

(EGPRS), etc.

 

 

 

 

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.

 

 

 

 

 

 

 

 

3G

Packet-

UMTS (Universal Mobile

CDMA2000 EV-DO (Evolution-Data

 

 

 

switched

Telecommunications System), a third-

Optimized, originally 1x Evolution-Data

 

 

 

 

generation (3G) wireless standard

Only), also referred to as EV-DO,

 

 

 

 

defined in ITUA specification, is

EVDO, or just EV, is an evolution of

 

 

 

 

sometimes marketed as 3GSM. The

CDMA2000 1xRTT and enables high-

 

 

 

 

UMTS uses GSM infrastructures and

speed wireless connectivity. It is also

 

 

 

 

W-CDMA (Wideband Code Division

denoted as IS-856 or High Data Rate

 

 

 

 

Multiple Access) as the air interface.

(HDR).

 

 

 

 

 

 

 

 

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

 

Fast

 

 

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.

To change your 3G WAN settings, click Network > Interface > Cellular.

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ZyWALL USG 100/200 Series User’s Guide