Asus P4T533 18. Chassis Open Alarm Lead (4-1pin CHASSIS), 17.Internal audio connectors (Three 4-pinCD, AUX, MODEM) (optional)

17.Internal audio connectors (Three 4-pin CD, AUX, MODEM) (optional)

These connectors allow you to receive stereo audio input from sound sources such as a CD-ROM, TV tuner, or MPEG card. The MODEM connector allows the onboard audio to interface with a voice modem card with a similar connector. It also allows the sharing of mono_in (such as a phone) and a mono_out (such as a speaker) between the audio and a voice modem card.

	MODEM	Left Audio Channel
	Modem-In
	Ground	Ground
	Ground	Ground
P4T533	Modem-Out	Right Audio Channel

AUX (White) CD(Black)

P4T533 Internal Audio Connectors

18. Chassis Open Alarm Lead (4-1 pin CHASSIS)

This lead is intended for a chassis that supports intrusion detection. The lead requires an external detection mechanism such as a chassis intrusion monitor/sensor or microswitch. When any chassis component is removed, the sensor is triggered and a high-level signal is sent to this lead to record a chassis intrusion event. The event is then be processed by software such as LDCM. When not using the chassis intrusion lead, place a jumper cap over the pins to close the circuit. Removing the jumper cap prevents the system from booting up.

P4T533

CHASSIS

+5VSB MB Chassis Signal GND

P4T533 Chassis Alarm Lead

40 Chapter 2: Hardware information