Dell Optiplex Dell OptiPlex GX1/GX1p Managed PC and OptiPlex NX1 Net PC Syste - Page 18
Chassis Intrusion, Enabled, Enabled-Silent, Disabled, Detected
UPC - 718122898176
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The ATI multimedia channel (AMC) implements a local graphics bus that allows external devices to attach directly to the graphics controller. The AMC allows devices to transfer video stream data to the graphics controller, for example, MPEG-2 decoding for digital video disk (DVD) applications, or to receive video stream data from the graphics controller to the device, for example, TV-Out circuitry, or to do both simultaneously. Most of the video stream data transfers occur on the AMC without congesting the PCI bus bandwidth. The 40-pin AMC connector, shown in Figure 1-12, consists of three ports into the graphics controller: a digital video stream (DVS) port for video input into the graphics controller, a multimedia peripheral port (MPP) for video input and output from the graphic controller, and an inter-integrated circuit (I2C)-compatible serial control port for controlling the attached devices. A fourth port, audio mixing bus (AMB), is not supported by the system. To route mixed audio from an AMC-compliant adapter card to the system board, CD-ROM audio cables must be attached from the adapter card's CD-ROM audio input and CD-ROM audio output connections to the AMC connector. See the AMC-compliant adapter card's documentation for more information. The OptiPlex GX1/GX1p and OptiPlex NX1 systems include a telephony application programming interface (TAPI) that allows the system board audio to interface with a modem to facilitate speakerphone functionality. The TAPIcompliant telephony input is a mono source with a maximum signal level of 2 Vrms. Chassis Intrusion displays the status of the system chassis intrusion monitor. The settings for this option are Enabled, Enabled-Silent, or Disabled. The default is Enabled. If the computer cover is removed while the intrusion monitor is set to Enabled, the setting changes to Detected, and the following message appears during the boot sequence at the next system start-up: If the computer cover is removed while the intrusion monitor is set to Enabled-Silent, the setting changes to Detected, but the alert message is not displayed during the boot sequence at the next system start-up. If the intrusion monitor is set to Disabled, no intrusion monitoring occurs and no messages are displayed. To reset the Detected setting, enter the System Setup program during the system's POST. Highlight the Chassis Intrusion option and press the left- or right-arrow key to choose Enabled, Enabled-Silent, or Disabled. NOTE: If a setup password has been assigned by someone else, contact your network administrator for information on resetting the chassis intrusion detector. 1-6