Sierra Wireless AirCard 710, Руководство пользователя, Страница: 17 / 53

Getting Started
Rev B Oct. 2001 9
AirC
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710
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so, service providersmust install additional equipmentat
their cellular radio towers and throughout their networks,
so not all areas with GSM coverage also have GPRS cover-
age.
If you intend touse packet mode data connections, ensure
that your service provider offers them in your area and
that their roaming agreements with other providers
include GPRS services.
•
Pricing
Note: The fee for service is
usually higher when you are
roaming (connecting to a
network other than the one
belonging to your service
provider).
Each service provider has its own pricing options. There
are flat rate accounts which provide you a maximum num-
ber ofminutes of network usage for a fixed monthly fee.
There are accounts for which you are charged for network
usage by the minute or by the amount of data transmitted.
You may want to shop around to find the best value,
depending on the mix of voice, circuit-modedata, and
packet-mode data services you intend to use.
SIM Card Information
Note: If you change GSM
service providers at any time
(such as if you move to a new
city), you will need a new SIM
card from your new service
provider, and you must
reactivate your AirCard 710
network card in the new location.
The SIM card is a small, thin data chip, about the size of a
postage stamp, that identifies your account and your
AirCard 710 network card to the GSM wireless network. It is
the same type of card used as a “smart card” or “smart chip”
in GSM mobile phones—in fact, your service provider may
allow you to move the same SIM card between a mobile phone
and your AirCard network card. Your AirCard package may
have included a SIM card from your service provider, or you
may need to obtain one.
Figure 2-1: A SIM Card (Left)