Chapter 7 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 47

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

 

NAMETYPEMOBILE PHONE AND DATA STANDARDSDATA
GSM-BASEDCDMA-BASEDSPEED

 

 

 

 

 

2G

Circuit-

GSM (Global System for Mobile

Interim Standard 95 (IS-95), the first CDMA-

Slow

 

switched

Communications), Personal Handy-

based digital cellular standard pioneered by

 

 

 

phone System (PHS), etc.

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 Services),

CDMA2000 is a hybrid 2.5G / 3G protocol of

 

 

switched

High-Speed Circuit-Switched Data

mobile telecommunications standards that use

 

 

 

(HSCSD), etc.

CDMA, a multiple access scheme for digital radio.

 

 

 

 

 

 

2.75G

Packet-

Enhanced Data rates for GSM Evolution

CDMA2000 1xRTT (1 times Radio Transmission

 

 

switched

(EDGE), Enhanced GPRS (EGPRS), etc.

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 Optimized,

 

 

switched

Telecommunications System), a third-

originally 1x Evolution-Data Only), also referred

 

 

 

generation (3G) wireless standard

to as EV-DO, EVDO, or just EV, is an evolution of

 

 

 

defined in ITUA specification, is

CDMA2000 1xRTT and enables high-speed

 

 

 

sometimes marketed as 3GSM. The

wireless connectivity. It is also denoted as IS-856

 

 

 

UMTS uses GSM infrastructures and W-

or High Data Rate (HDR).

 

 

 

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.

 

 

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 device to use a cellular connection.

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

 

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ZyWALL 110/310/1100 Series User’s Guide