Chapter 11 Interfaces

Aside from selecting the 3G network, the 3G card may also select an available 2.5G or 2.75G network automatically. See the following table for a comparison between 2G, 2.5G, 2.75G and 3G of wireless technologies.

Table 59 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

Slow

 

switched

Communications), Personal

first CDMA-based digital cellular

 

 

 

 

Handy-phone System (PHS), etc.

standard 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

 

 

 

 

Switched Data (HSCSD), etc.

telecommunications standards that

 

 

 

 

 

use CDMA, a multiple access scheme

 

 

2.75G

Packet-

Enhanced Data rates for GSM

 

 

for digital radio.

 

 

 

switched

Evolution (EDGE), Enhanced GPRS

 

 

 

 

 

 

 

 

(EGPRS), etc.

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.

 

 

 

 

 

 

 

 

3G

Packet-

UMTS (Universal Mobile

CDMA2000 EV-DO (Evolution-Data

 

 

 

switched

Telecommunications System), a

Optimized, originally 1x Evolution-

 

 

 

 

third-generation (3G) wireless

Data Only), also referred to as EV-

 

 

 

 

standard defined in ITUA

DO, EVDO, or just EV, is an evolution

 

 

 

 

specification, is sometimes

of CDMA2000 1xRTT and enables

 

 

 

 

marketed as 3GSM. The UMTS

high-speed wireless connectivity. It

 

 

 

 

uses GSM infrastructures and W-

is also denoted as IS-856 or High

 

 

 

 

CDMA (Wideband Code Division

Data Rate (HDR).

 

 

 

 

Multiple Access) as the air

 

 

 

 

 

interface.

 

 

 

 

 

 

 

 

 

3.5G

Packet-

HSDPA (High-Speed Downlink

 

 

 

 

switched

Packet Access) is a mobile

 

 

 

 

 

telephony protocol, used for

 

 

 

 

 

UMTS-based 3G networks and

 

 

 

 

 

 

 

 

 

 

allows for higher data transfer

 

 

 

 

 

speeds.

 

Fast

 

 

 

 

 

 

 

 

 

 

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 Configuration > Network > Interface > Cellular.

Note: Install (or connect) a compatible 3G USB to use a cellular connection. See Chapter 52 on page 775 for details.

Note: The WAN IP addresses of a ZyWALL with multiple WAN interfaces must be on different subnets.

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ZyWALL USG 50 User’s Guide