Apple GeoPort Telecom Adapter Kit - Manual (Page 46)

Ring Sound
Choose the sound that your Macintosh plays when you
receive an incoming call from the Ring Sound pop-up menu.
You can also install and use your own sounds.
See the Macintosh Guide in the Guide menu or the
documentation that came with your computer for
information about installing additional sounds.
Use internal modem (Express Modem only)
The “Use internal modem instead of Modem Port” checkbox
is only available on certain Macintosh PowerBook
computers. It does not appear, for example, if your
computer uses the GeoPort Telecom Adapter, as the setting
is done automatically.
This feature redirects all modem activity from the modem
port to the internal modem.
For example, if you use a non-CTB compatible program with
the Express Modem hardware, you need to select this
checkbox. This enables non-CTB programs that use Serial
Port A (Modem Port) to communicate with the Express
Modem software.
If you plan to use another serial device on your Modem Port,
such as a printer, you need to deselect the checkbox.
Note: Either checkbox setting is acceptable for Apple
Remote Access.
Important Applications that use a non-standard means of
accessing a modem (for example, bypassing the serial driver
and directly controlling the hardware, or implementing an
alternative to the standard serial driver) cannot be used with
the Express Modem software.
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