AirLink Communications Raven X HSDPA Guia do Utilizador descarregar pdf (Página 12)

Raven X HSUPA

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Steps of a connection:

1. When your Raven X is powered on, it automatically searches for cellular

service using HSUPA/HSDPA.

2. Your Raven X establishes a PPP (Point to Point Protocol or “dial” up

connection) link to AT&T network, also called registering on the network, and

receives an IP address.

3. When your Raven X has received its IP address from AT&T, a connection to

the Internet or the cellular network is also available for computers or other

devices connected directly to the Raven X.

The Raven X will perform routing for all internet traffic to and from the computers

or other end devicse.

With the Raven X in Ethernet Public mode, only one device connected to the

Ethernet port will receive the public IP address which is the one provided by the

cellular network. In Ethernet Private mode, with a hub or switch connected to the

Ethernet port, the Raven X will provide NAT for a range of computers or other

devices connected to the switch or hub and Internet access to all of them.

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 Raven X

might not always receive the same address each time it connects with AT&T.

• Static addresses are permanently assigned to a particular account and will

always be used whenever your Raven X 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 since 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 AT&T includes a dynamic IP address and you need a static IP,

please consult your AT&T Representative for more information about changing your

account for static IP support.

If you need to contact your Raven X, a device connected to the Raven X, or a host

system using the Raven X 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.

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