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Appendix A Specifications 79
USB Specifications
• Support for Universal Serial Bus (USB) 2.0 and 1.1
• Five external USB Type A ports
• One USB 2.0 port on the front
• Two USB 2.0 ports on the back
• Two USB 1.1 ports on the Apple Keyboard
• Each rear port is on a separate 480 megabit-per-second (Mbps) USB channel
• 500 milliamperes (mA) at 5 V are available for each USB 2.0 port, for a total of
1.5 amperes
FireWire Specifications
• Support for FireWire 400 and FireWire 800
• Three external FireWire ports
• One FireWire 400 port on the front
• One FireWire 400 and one FireWire 800 port on the back
• Data transfer speed:
• FireWire 400: 100, 200, and 400 Mbps
• FireWire 800: 100, 200, 400, and 800 Mbps
Power
• Output voltage range: Approximately 13 to 25 V
• Output power range: Up to 15 W
Ethernet Specifications
• IEEE 802.3 compliant
• Maximum cable length: 100 meters (m)
• Protocols: Open Transport, AppleShare, AppleTalk, NetWare for Macintosh, TCP/IP
• Connector: RJ-45 for 10Base-T, 100Base-TX, and 1000Base-T
• Media, 10Base-T: Category 3 or higher UTP on 2 pairs up to 100 m
• Media, 100Base-TX: Category 5 UTP on 2 pairs up to 100 m
• Media, 1000Base-T: Category 5 and 6 UTP on 4 pairs up to 100 m
• Channel speeds: IEEE Auto Negotiation of 10Base-T, 100Base-TX, and 1000Base-T
Modem Specifications
• Data communications standard: K56Flex and V.92
• Speed: 53 kilobits per second (Kbps)
• Fax standard: ITU V.17
Bluetooth Specifications (Optional)
• Wireless data rate: Up to 1 Mbps
• Range: Up to 30 feet (data rates may vary depending on environmental conditions)
• Frequency band: 2.4 gigahertz (GHz)