Sierra Wireless AirCard 710, Руководство пользователя, Страница: 49 / 53

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5: Data Connections Through
GSM and GPRS
• Dial-Up Circuit Mode
Calls
• Packet Mode
Connections
You use the Data tab in the main Watcher window tomake
data connections, such as for browsing the Web, sending and
receiving e-mail, dialing into your corporate network, or
sending and receivingfaxes.
The AirCard
®
710 network card offers two different types of
data connections (also see “How Circuit Mode and Packet
Mode DataConnections Differ” on page3):
Note: You cannot have a data
and a voice connection at the
same time. If you have a data
connection when an incoming
call occurs, your caller will get a
busy signal or be put through to
your voice mail box.
•
Dial-up circuit mode call
– in this type of connection, the
AirCard 710 network card functions as a modem. You
provide the phone number and the AirCard modem dials
the number and converts your data into sounds that are
transmitted over the GSM voice circuit—justas atradi-
tional modem sends sounds over a phone line.
Using this type of connection, you can connect to any other
modem (including oneat your Internet provider) and
receive faxes. The maximum speed of this type of connec-
tion is 9.6kbps. (Effective throughput may be faster with
data compression.) For moreinformation, see “Connection
Speed” on page 4.
Note: Depending on your billing
plan, there may be a surcharge
or different billing arrangement
for GPRS packet mode connec-
tions.
•
Packet mode network connection – in this type of
connection, the AirCard 710 network card behaves like a
LAN card, and establishes a fully digital GPRS connection
to the GSM network. (You do not need to provide a phone
number and there is no dialinginvolved.) The maximum
speed of this connection is 1 1 5kbps (see “Connection
Speed” on page 4), but it isonly available in areas where
GPRS has been implemented by the GSM service provider.
Note: Although you may not be
charged extra money while
connected in packet mode, but
not actively moving data, the
AirCard network card continues
to use power in that mode. For
best power conservation from
your computer, shut down any
AirCard wireless connections if
you do not need them.
The packet mode connection provides “always on” direct
access to the Internet, without havingto dial an Internet
provider’s modem bank first. Once the connection is estab-
lished, you can browse the Web, sendand receive e-mail,
transfer files, connect toyour company’s virtual private
network (VPN) and so on. Once you havemade a packet
mode connection, you can leave it running if you wish,
since service providers usually charge only for data sent
and received, not for the timeyou are connected (see “How
Circuit Modeand Packet Mode Data Connections Differ”
on page 3).