SE440BX Motherboard Product Guide
15
Wake on Ring
Wake on Ring enables the computer to wake from sleep or soft-off mode when a call is received
on a telephony device, such as a modem, configured for operation on COM1. The first incoming
call powers up the computer. A second call must be made to access the computer. To access this
feature use the Wake on Ring connector. See Chapter 5 for the location and pinouts of the Wake
on Ring connector.
Wake on LAN Technology (Optional)
Wake on LAN technology enables remote wakeup of the computer through a network. Wake on
LAN technology requires a PCI add-in network interface card (NIC) with remote wakeup
capabilities. The remote wakeup connector on the NIC must be connected to the onboard Wake on
LAN technology connector. The NIC monitors network traffic at the MII interface; upon
detecting a Magic Packet†, the NIC asserts a wakeup signal that powers up the computer. To
access this feature use the Wake on LAN technology connector. See Chapter 5 for the location and
pinouts of the Wake on LAN technology connector.
CAUTION
For Wake on LAN, the 5-V standby line for the power supply must be capable of delivering +5 V

±

5 % at 720 mA. Failure to provide adequate standby current when implementing Wake on LAN,
can damage the power supply.
Hardware Monitor (Optional)
The optional hardware monitor subsystem provides low-cost instrumentation capabilities. The
features of the hardware monitor subsystem include:
• Support for an optional chassis intrusion connector
• An integrated ambient temperature sensor
• Fan speed sensors that monitor the fan 1 and fan 2 connectors (see Figure 15 for the location of
these connectors on the motherboard)
• Power supply voltage monitoring to detect levels above or below acceptable values
When suggested ratings for temperature, fan speed, or voltage are exceeded, an interrupt is
activated. The hardware monitor component connects to the system management (SM) bus.
Audio Subsystem (Optional)
The optional audio subsystem consists of the following:
• Crystal Semiconductor CS4236B audio codec
• Crystal Semiconductor CS4611 PCI audio accelerator
• Back panel and onboard audio connectors