Mass Storage; Serial Interface; Universal Serial Bus Interface; Network Interface Controller - HP Compaq dc7900 USDT Technical Reference Manual

2.3.5 Mass Storage

All models support at least two mass storage devices, with one being externally accessible for
removable media. These systems provide the following interfaces for internal storage devices:
USDT: two SATA interfaces
SFF: three SATA interfaces and one eSATA port
CMT: four SATA interfaces and one eSATA port
These systems may be preconfigured or upgraded with a SATA hard drive and one removable
media drive such as a CD-ROM drive.

2.3.6 Serial Interface

The SFF and CMT form factors include a serial port accessible at the rear of the chassis. The SFF
and CMT form factors may be upgraded with a second serial port option. The serial interface is
RS-232-C/16550-compatible and supports standard baud rates up to 115,200 as well as two
high-speed baud rates of 230K and 460K.

2.3.7 Universal Serial Bus Interface

All models provide ten Universal Serial Bus (USB) ports. Two ports are accessible at the front of
the unit, six ports are accessible on the rear panel, and two ports are accessible through a header
on the system board. The SFF and CMT form factors support a media card reader module that
connects to the internal header. These systems support USB 1.1 and 2.0 functionality on all ports.
BIOS Setup allows for the disabling of USB ports individually or in groups. In order to secure
the system against a physical attack, ports may be disabled even if there is nothing physically
connected to them, such as the two front ports for the media card reader module when the
module is not present.

2.3.8 Network Interface Controller

All models feature an Intel gigabit Network Interface Controller (NIC) integrated on the system
board. The controller provides automatic selection of 10BASE-T, 100BASE-TX, or
1000BASE-T operation with a local area network and includes power-down, wake-up,
Alert-On-LAN (AOL), Alert Standard Format (ASF), and AMT features. An RJ-45 connector
with status LEDs is provided on the rear panel.
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