Rear Chassis Components - Silicon Graphics Origin 300 User Manual

A: Technical Specifications

Rear Chassis Components

122
Figure A-5 illustrates the rear panel I/O ports and features of the SGI Origin 300 base
module.
• Power connector connects to an AC power outlet.
• LINK connector (NUMAlink connector) connects the base module to a NUMAlink
module. This connection is made with a NUMAlink 3 cable at 1.6 GB/s in each
direction.
• XIO connector connects to an InfiniteReality graphics module.
• L1 console port (console and diagnostic port) connects the base module's L1
controller to a system console that runs the SGIconsole software.
• USB L1 port (universal serial bus) connects the base module's L1 controller to an L2
controller.
• PCI slots 1 and 2 house PCI cards. The two PCI 2.2-compliant slots are configured
on one bus. The PCI bus supports both 32- and 64-bit modes at 33 or 66 MHz. Refer
to the SGI Supportfolio Online home page at http://support.sgi.com for an
updated list of supported PCI cards.
• Serial ports 1 and 2 can be used as COM ports to connect modems or other serial
devices.
• USB ports 1 and 2 connect auxiliary equipment such as a keyboard or a mouse.
• RT interrupt input and output (real-time interrupts) are used by the graphics cards
to keep the graphics synchronized.
• Ethernet port (autonegotiating 10BaseT or 100BaseT Ethernet port) connects the
base module to an Ethernet network.
• External SCSI connector (68-pin VHDCI external SCSI port) connects to SCSI
devices (for example, TP900 storage module). Refer to the SGI Supportfolio Online
home page at http://support.sgi.com for an updated list of supported SCSI devices.
• Heartbeat LEDs (four, one for each processor) indicate processor activity.
007-4498-002