Fujitsu Siemens Computers Fujitsu-Siemens PC - Manual (Page 46)

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Our tips and hints …
... for setting the country code
When dialling country and area codes, WindowsXP uses the
settings that are entered under "Telephony" in the Control Panel.
After installation of Windows a country, e.g. "United Kingdom", may
already be entered under Location/Country. This may lead to
wrong numbers being dialled when using the modem. Before using
your modem for the first time, you should therefore change this
setting to the country in which you are running the PC and by
entering the appropriate number under "Area code".
For example, for the United Kingdom, the procedure is as follows:
• Open "Start" / "Control Panel" / "Printers and other
hardware" / "Telephone and modem options".
• Select the "Dialling rules" tab, by double clicking on "New
location" under Location. "Edit location" appears.
• Under "Country/Region" select "United Kingdom" and enter
your local area code under "Area code", then click on "Apply"
and confirm with "OK".
ISDN
ISDN is the abbreviation for Integrated Services Digital Network.
ISDN cards are used to establish a data connection between any
two compatible terminals. In contrast to a modem, these terminals
(ISDN cards) work on an exclusively digital basis (no
modulation/demodulation). Data transmission takes place on two
channels, each at 64kbit/s. These channels are known as B
channels. A further channel known as the D channel is responsible
for the exchange of control signals for the transmission terminals.