AirLink Communications Raven X HSDPA Guia do Utilizador descarregar pdf (Página 14)

Raven X HSUPA

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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 X to a USB or a Ethernet (RJ45) on a computer.

When connected to a USB or Ethernet port, the Raven X behaves like a network

card.

USB

The Raven X 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 X and connect

directly to your computer for best throughput.

Virtual serial port

The Raven X 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

Networking

IPSec

The IP protocol that drives the Internet is inherently insecure. Internet Protocol

Security (IPSec), which is a standards-based protocol, secures communications

of IP packets over public networks.

IPSec is a common network layer security control and is used to create a virtual

private network (VPN).

The advantages of the IPSec feature includes:

• Data Protection: Data Content Confidentiality allows users to protect their

data from any unauthorized view, because the data is encrypted (encryption

algorithms are used).

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AirLink Communications Raven X HSDPA Guia do Utilizador Página 14