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Raven X 1x/EV-DO
6
Dynamic vs. Static IP Addresses
There are two types of addresses on networks: dynamic and static.
•
Dynamic addresses are assigned on a "need to have" basis. Your Raven X
might not always receive the same address each time it connects with your
cellular Network.
•
Static addresses are permanently assigned to a particular account and will
always be used whenever your Raven X connects to the Internet. The IP
address will not be given to anyone else.
Most ISPs (cellular included) use dynamic IP addresses rather than static IP
addresses since it allows them to reuse a smaller number of IP addresses for a
large number of customers. A dynamic IP address is suitable for many common
Internet uses, such as web browsing, looking up data on another computer
system, or other client functions (such as data only being sent out or only being
received after an initial request).
Tip:
If your account with your cellular Network includes a dynamic IP address and you
need a static IP, please consult your your cellular Network Representative for more infor-
mation about changing your account for static IP support.
If you need to contact your Raven X, a device connected to the Raven X, or a host
system using the Raven X from the Internet, you need to have a known IP (such
as one which is static) or domain name (an IP address which is converted by a
DNS server into a word based name). If you have a dynamic IP address for your
modem, 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 Raven X using TCP/IP, the IP address
given to your modem by your cellular Network 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 your Raven X will fall
back to 1x when EV-DO is not available.
Sierra Wireless is certified with your cellular Network, 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 also increases the uplink speed. In addition, it is
backwards compatible and automatically connects with existing and broadly
deployed EV-DO Rev. 0 and 1x networks ensuring reliable and pervasive
connectivity.
20070914
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