Chapter 8 WAN Screens

"The actual data rate you obtain varies depending on the 3G card you use, the signal strength of the service provider’s base station, your service plan, etc.

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, 3G and 3.5G wireless technologies.

Table 41 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.

After you insert a 3G card in the ZyWALL, the 3G connection becomes WAN 2. Refer to the Chapter 49 on page 693 for the type of 3G cards that you can use in the ZyWALL along with the corresponding supported features.

To change your ZyWALL's 3G WAN settings, click NETWORK > WAN > 3G (WAN 2) or WIRELESS > 3G (WAN 2).

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ZyWALL 2WG User’s Guide