Apple GeoPort Telecom Adapter Kit - Manual (Page 49)

Wake Macintosh on ring (Express Modem only)
The “Wake Macintosh on ring” checkbox is only available on
certain Macintosh PowerBook computers. When a ring signal
is detected on the telephone line, your PowerBook wakes up
and—provided Express Modem and at least one program are
set to auto-answer—answers the call.
When the checkbox is selected, the PowerBook wakes up for
an incoming call even if Express Modem is turned off, or
neither the modem nor any program are set to auto-answer.
When the checkbox is deselected, the PowerBook will not
wake up, so an incoming call is not answered even if Express
Modem and a program are set to auto-answer.
Note: “Wake Macintosh on ring” is also an internal function
of certain Power Macintosh computers, though for these
computers the checkbox is not available in the control panel.
Your computer will wake up whenever there is an incoming
call, provided Express Modem and at least one
communications program are set to auto-answer.
49 Using Your Modem