User manual

RLXIC-SV ♦ Intelligent Cellular Introduction to the RLXIC-SV
RadioLinx Intelligent Cellular Serial Modem for the Verizon Wireless CDMA Network User Manual
Page 10 of 146 ProSoft Technology, Inc.
May 29, 2009
1.3 Connecting to your cellular provider
The RLXIC-SV uses your cellular provider as an ISP (Internet Service Provider)
to connect you to the Internet.
1.3.1 Steps of a connection
1 When your RLXIC-SV is powered on, it automatically searches for cellular
service using CDMA.
2 Your RLXIC-SV establishes a PPP (Point to Point Protocol or "dial" up
connection) link to the your cellular provider network, also called registering
on the network, and receives an IP address.
3 When your RLXIC-SV has received its IP address from your cellular provider,
a connection to the Internet or the cellular network is also available for a
computer or other device connected directly to the RLXIC-SV.
The RLXIC-SV will perform a one-to-one routing for all internet traffic to and
from the computer or other end device. One-to-one means that your RLXIC-SV
will provide a connection for one device to the Internet at a time. In Private Mode,
the RLXIC-SV will provide NAT (Network Address Translation) for the computer
or other end device.
1.3.2 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 RLXIC-SV
might not always receive the same address each time it connects with your
cellular provider.
 Static addresses are permanently assigned to a particular account, and will
always be used whenever your RLXIC-SV 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, because 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).