Toshiba Tecra A4 (PTA42) - Manual (Page 73)

User’s Manual 4-18
Operating Basics
Using the microphone
Depending on the model you purchased, your computer has a built-in
microphone that can be used to record monaural sounds into your
applications. It can also be used to issue voice commands to applications
that support such functions.
Since your computer has a built-in microphone and speaker, “feedback”
may be heard under certain conditions. Feedback occurs when sound from
the speaker is picked up in the microphone and amplified back to the
speaker, which amplifies it again to the microphone.
This feedback occurs repeatedly and causes a very loud, high-pitched
noise. It is a common phenomenon that occurs in any sound system when
the microphone input is output to the speaker (throughput) and the speaker
volume is too loud or too close to the microphone. You can control
throughput by adjusting the volume of your speaker or through the Mute
function in the Master Volume panel. Refer to your Windows documentation
for details on using the Master Volume panel.
Modem
This section describes how to connect and disconnect the internal modem
to and from a telephone jack.
Region selection
Telecommunication regulations vary from one region to another, so you will
need to make sure the internal modem’s settings are correct for the region
in which it will be used.
To select a region, follow the steps below.
1. In Windows XP, click start, point to All Programs, point to TOSHIBA,
point to Networking and click Modem Region Select Utility.
The internal modem does not support voice functions. All data and fax
functions are supported.
■ In case of a lightning storm, unplug the modem cable from the
telephone jack.
■ Do not connect the modem to a digital telephone line. A digital line will
damage the modem.
Do not use the Country/Region Select function in the Modem setup utility
in the Control Panel if the function is available. If you change the Country/
Region in the Control Panel, the change may not take effect.