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32 ASUS P2B-L/P2B-S/P2B-LS User’s Manual
Connectors
III. INSTALLATION
III. INSTALLATION
14. Message LED Lead (TB LED)
This indicates whether a message has been received from a fax/modem. The LED
will remain lit when there is no signal and blink when there is data being trans-
ferred or waiting in the inbox. This function requires ACPI OS and driver support.
15. SMI Suspend Switch Lead (SMI)
This allows the user to manually place the system into a suspend mode or “Green”
mode where system activity will be decreased to save electricity and expand the
life of certain components when the system is not in use. This 2-pin connector
(see figure below) connects to the case-mounted suspend switch. If you do not
have a switch for the connector, you may use the “Turbo Switch”. SMI is acti-
vated when it detects a short to open moment and therefore leaving it shorted
will not cause any problems. This may require one or two presses depending on
the position of the switch.
16. ATX Power Switch / Soft Power Switch (PWR)
The system power is controlled by a momentary switch connected to this lead.
Pressing the button once will switch the system between ON and SLEEP. Press-
ing the switch while in the ON mode for more than 4 seconds will turn the
system off. The system power LED shows the status of the system’s power.
17. Reset Switch Lead (RESET)
This 2-pin connector connects to the case-mounted reset switch for rebooting
your computer without having to turn off your power switch. This is a preferred
method of rebooting to prolong the life of the system’s power supply.
18. System Power LED (KEYLOCK)
This 3-pin connector connects the system power LED, which lights when the
system is powered on and blinks when it is in sleep mode.
19. Keyboard Lock Switch Lead (KEYLOCK)
This 2-pin connector connects to the case-mounted key switch to allow key-
board locking.
20. Speaker Connector (SPEAKER)
This 4-pin connector connects to the case-mounted speaker.
R
P2B-L/S/LS Panel Connectors
PLED
Ground
TB_LED
PWR_SW
*
Requires an ATX power supply.
+5 V
KEYLOCK
+5V
SPKR
Keyboard Lock
Speaker
Connector
Power LED
Ground
+5 V
Reset SW
SMI Lead
Turbo LED
ATX Power Switch*
ExtSMI#
+3VSB
ResetCon
Ground
Ground
Ground