Ev-Do; Security; Connection Methods - Sierra Wireless AirLink GX400 User Manual

Introduction to the AirLink GX400
If you need to contact your AirLink GX400, a device connected to the AirLink
GX400, or a host system using the AirLink GX400 from the Internet, you need to
have a known IP (such as one which is static) or domain name (an IP address
converted by a DNS server into a word based name). If you have a dynamic IP
address for your device, you can use a Dynamic DNS service (such as IP
Manager) to translate your IP address into to a domain name.
Caution: If you want to connect remotely to your AirLink GX400 using TCP/IP, the IP
address given to your device by Verizon cannot be a private or internal IP address (such
as a special private network) unless you are on the same network or inside that network's
firewall (such as with frame relay).

EV-DO

CDMA (Code Division Multiple Access) is the underlying digital radio network
technology used by many cellular providers across the globe and is prevalent in
North America. To provide backward compatibility and seamless connections in a
wider range of locations, Sierra Wireless EV-DO products like the AirLink GX400
will fall back to 1x when EV-DO is not available.
Sierra Wireless is certified with Verizon, a prominent North American 1x and
EV-DO carrier.
EV-DO revision A is an enhancement on the original revision 0 adding expanded
upload capabilities and a more robust connection overall. In addition to increasing
the downlink speed, revision A increases the uplink speed, is backwards
compatible, and automatically connects with existing and broadly deployed EV-
DO Rev. 0 and 1x networks ensuring reliable and pervasive connectivity.

Security

1x data transmissions are highly secure. Originally developed based upon the
"spread spectrum" pioneered by the US Department of Defense, security in
CDMA technologies is obtained by spreading the digital information contained in
a particular signal of interest over multiple coded paths, and over a much greater
bandwidth than the original signal.

Connection methods

You can connect the AirLink GX400 to a USB (micro A/B), an Ethernet (RJ45), or
a serial (RS232) port on a computer. When connected to a USB or Ethernet port,
the AirLink GX400 behaves like a network card.
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