Sierra Wireless Airlink Raven XE HSPA, User Manual, Page: 16 / 53

AirLink Raven XE HSPA User Guide
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Tip: If your account with your cellular provider includes a dynamic IP address and you
need a static IP, please consult your your cellular provider representative for more infor-
mation about changing your account for static IP support.
If you need to contact your AirLink Raven XE, a device connected to the AirLink
Raven XE, or a host system using the AirLink Raven XE 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 Sierra Wireless’s IP Manager) to translate your IP address into to a
domain name.
Caution: If you want to connect remotely to your AirLink Raven XE using TCP/IP or
UDP/IP, the IP address given to your modem by your cellular provider 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).
Communications
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.
HSPDA (and HSUPA) falls back to UMTS, EDGE, or GPRS (in order of
precedence). This feature allows you to have seamless connectivity no matter
where your AirLink Raven XE is.