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SonicOS 5.8.1 Administrator Guide
Managing 3G Connections
To initiate a 3G connection, perform the following steps, click on the Manage button in the 3G
interface line on the Network > Interfaces page. The 3G Connection window displays. Click
the Connect button. The SonicWALL appliance attempts to connect to the 3G service provider.
To disconnect a 3G connection, click on the Manage button. The 3G Connection window
displays. Click Disconnect.
Specifying the WAN Connection Model
To configure the WAN connection model, navigate to the Network > Interfaces page and
select one of the following options in the WAN Connection Model pulldown menu:
• 3G only - The WAN interface is disabled and the 3G interface is used exclusively.
• Ethernet only - The 3G interface is disabled and the WAN interface is used exclusively.
• Ethernet with 3G Failover - The WAN interface is used as the primary interface and the
3G interface is disabled. If the WAN connection fails, the 3G interface is enabled and a 3G
connection is automatically initiated. See “Specifying the WAN Connection Model” on
page 243 for more information.
3G_glossary
3G Glossary
• 1xRTT - Single Carrier Radio Transmission Technology - The second generation of the
CDMA protocol, permitting many radios to simultaneously share the same frequency.
1xRTT was mostly deployed in the Americas, but is now undergoing an evolution to 1xEV-
DO by many operators.
• 1xEV-DO - Single Carrier Evolution Data Optimized (Also EV-DO) - The evolution of the
1xRTT protocol, EV-DO provides true 3G speeds, competing with UMTS, but remains most
widely used in the Americas. There are currently two revisions of EV-DO available: Rev. 0,
which provides data rates up to 2.4 Mbps, and Rev. A, with data rates up to 3.1 Mbps.
• APN - Access Point Name - Designated the external connection point (access point) for
devices on a GPRS network. APN designation is only required by GPRS devices, and will
be provided by the network operator. APN uses a notation such as "general.t-mobile.uk",
"btmobile.bt.com" and "wap.cingular".
• DMA - Code Division Multiple Access - A multiplexing technique that allows for multiple
concurrent accesses to a channel through the use of unique data encoding rather than time
or frequency based division of access. CDMA has capacity advantages over GSM, but
congestion tends to reduce its operating range. Also refers to Qualcomm's family of
protocols.
• EDGE - Enhanced Data rates for GSM Evolution - Also known an Enhanced GRPS.
EDGE is an adaptive GPRS implementation employed by many GSM networks. It improves
upon GPRS by using up to 8 time-slots (as opposed to a maximum of 5) with a denser
modulation scheme for higher data rates. EDGE is regarded as a cost-saving interim GSM
protocol until more widespread adoption of UMTS is seen, and it is currently broadly
available in all worldwide geographies.
• ESN - Electronic Serial Number - A 32 bit number used to uniquely identify stations on a
CDMA network. ESNs are the effective equivalent of GSM's IMEI scheme.