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Advanced/RH Technical Product Specification •• Page 17
SPEAKER
The external speaker provides error beep code information during the Power-On Self Test if the system cannot
use the video interface. If no speakers are plugged into the audio output jack, the audio output is redirected to
the external PC speaker.
SLEEP / RESUME
When Advanced Power Management (APM) is activated in the system BIOS and the operating system’s
APM driver is loaded, Sleep mode (Stand-By) can be entered in one of three ways: an optional front panel
“Sleep/Resume” button, a user defined keyboard hot key, or prolonged system inactivity. The
Sleep/Resume button is supported by a 2-pin header located on the front panel I/O connector. Closing the
“Sleep” switch will generate an SMI (System Management Interrupt) to the processor which immediately
goes into System Management Mode (SMM), the so called “Sleep” mode. The front panel “Sleep mode”
switch must be a momentary two pin SPST type that is normally open. The function of the Sleep/Resume
button can also be achieved via a keyboard hot-key sequence, or by a time-out of the system inactivity
timer. Both the keyboard hot-key and the inactivity timer are programmable in the BIOS setup (timer is
set to 10 minutes by default). To re-activate the system, or “Resume”, the user must simply press the
sleep/resume button again, or use the keyboard or mouse. Note that mouse activity will only “wake up”
the system if a mouse driver is loaded. While the system is in Stand-By or “sleep” mode it is fully
capable of responding to and servicing external interrupts (such as incoming fax) even though the monitor
will only turn on if a user interrupt (keyboard/mouse) occurs as mentioned above. This interface is also
supported by pins 1 and 2 of the PS SLEEP connector.
INFRA-RED (IRDA) CONNECTOR
Serial port 2 can be configured to support an IrDA module via a 5 pin header connector . Once
configured for IrDA, the user can transfer files to or from portable devices such as laptop computers,
PDA’s or printers using application software such as Traveling Software’s LapLink. The IrDA
specification provides for data transfers at 115 Kbps from a distance of 1 meter.
RESET
This 2-pin header can be connected to a momentary SPST type switch that is normally open. When the switch
is closed, the system will hard reset and run POST.