Apple GeoPort Telecom Adapter Kit - Manual (Page 47)

Progress sounds (Express Modem only)
MENU SETTING MEANING
Use application settings Allows you to control the speaker
volume from the application
setting and Sound control panel.
Turn off Turns the speaker off for applications
that use the modem.
Same as setting ATM=0 for all
modem applications.
Keep on until carrier Leaves the speaker on until Carrier
is established.
Same as setting ATM=1 for all
modem applications.
Fax progress sound (Apple Serial Modem only)
You can monitor the progress sounds of a sent fax by
selecting the “Fax progress sound” checkbox (the default).
Deselect the checkbox to turn off all sounds during fax send
or receive.
47 Using Your Modem