User guide

Introduction to the Raven XT
Rev 1.0 May.10 5
Caution: If you want to connect remotely to your Raven XT 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 special private network) unless you are on the same network or inside that
network’s firewall (such as with frame relay).
GSM
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.
GPRS
General Packet Radio Service (GPRS) is packet-switched with many users
sharing the same transmission channel, but only transmitting when they have
data to send. This means that the total available bandwidth can be immediately
dedicated to those users who are actually sending at any given moment,
providing higher utilization where users only send or receive data intermittently.
GPRS provides speeds of 30–70 kbps with bursts up to 170 kbps.
Connection methods
You can connect the Raven XT to a USB or a Ethernet (RJ45) on a computer.
When connected to a USB or Ethernet port, the Raven XT behaves like a network
card.
USB
The Raven XT is equipped with a USB port which increases the methods by
which you can send and receive data. The USB port can be set to work as either
a virtual Ethernet port or a virtual serial port. A driver installation is required to
use the USB port in either mode.
It is recommended that you use a USB 2.0 cable with your Raven XT and connect
directly to your computer for best throughput.
Virtual serial port
The Raven XT supports one virtual serial port over USB. This VSP can be used,
for example, to send AT commands, or to run many serial based applications
such as HyperTerminal
®
.