Introduction to the RLXIC-EH
RLXIC-EH
♦
Intelligent Cellular
User Manual
RadioLinx Intelligent Cellular Ethernet Gateway for HSUPA (3G GSM) Networks
ProSoft Technology, Inc.
Page 11 of 111
May 29, 2009
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).
Tip:
If your account with your cellular provider includes a dynamic IP address, and you need a
static IP, please consult your cellular provider Representative for more information about changing
your account for static IP support.
If you need to contact your RLXIC-EH, a device connected to the RLXIC-EH, or a
host system using the RLXIC-EH 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 RLXIC-EH using TCP/IP, the IP address given to
your modem by your cellular provider cannot be a private or internal IP address (such as a custom
APN or special private network Data Link) unless you are on the same network or inside that
network's firewall (such as with frame relay).
1.4 GSM
Communication
Many GSM Networks have been upgraded to support HSUPA.
GSM Networks use SIM cards which are smart cards containing the account
holder's details. A SIM can generally be moved from one device to another
allowing for account portability and flexibility.
HSUPA
HSUPA (High-Speed Uplink Packet Access) is a cellular technology which most
closely resembles a broadband synchronous connection. The upload and
download speeds are maximized to provide a faster throughput, reaching speeds
up to 2.0 Mbit/s for the uplink and 7.2 Mbit/s for the downlink.
Please check with your network provider on the availability of HSUPA.
HSDPA
HSDPA (High-Speed Downlink Packet Access) is a cellular technology allowing
for higher data transfer speeds. In HSDPA mode of operation, max speeds are
up to 7.2 Mbit/s in the downlink and 384 kbit/s in the uplink. HSDPA uses
Adaptive Modulation and Coding (AMC), fast packet scheduling at the Node B
(Base Station) and fast retransmissions from Node B (known as HARQ-Hybrid
Automatic Repeat Request) to deliver the improved downlink performance vs.
UMTS and EDGE.
Summary of Contents for RLXIC-EH
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