Apple MB321LL User Guide - Page 9

To use the base station in an air-handling space above suspended ceilings, you must connect the Ethernet WAN port to an 802.3af-compliant PSE with a plenum-rated Ethernet cable. You cannot use the AC power adapter to power a base station installed in an air-handling space. When the base station receives power over Ethernet, the USB port is disabled. Do not connect an external antenna to a base station mounted in an air-handling space unless the antenna conforms to UL Standard 2043. Some external antennas are not compliant. AirTunes If you are using AirPort Express, and you have connected it to your stereo or powered speakers, you can play iTunes music on the stereo using AirTunes. AirTunes is an encoding technology that allows for CD-quality transmission of iTunes music over the air. You can stream music from your iTunes library to AirPort Express, and AirPort Express plays the music on your stereo through cables connected to the analog and optical digital audio stereo mini-jack. The music is buffered to help ensure smooth playback without skips or jumps. Anything you play in iTunes-MP3 files, AAC files, audio books, even Dolby surroundsound-you can play using AirTunes. To use AirTunes, you need an AirPort Express connected to your stereo or powered speakers, AirPort 4.0 or later, and iTunes 4.6 or later. Printing via an AirPort Extreme Base Station or AirPort Express If you have a USB printer connected to the AirPort Extreme Base Station or AirPort Express, computers on the network can print to the printer by setting it up in Windows XP or Windows 2000. For detailed instructions on setting up a printer connected to the base station, see "Connecting a USB Printer to the AirPort Extreme Base Station or AirPort Express" on page 51. Note: If your AirPort Extreme Base Station supports PoE, and is receiving power from an 802.3af-compliant PSE, do not connect a printer to it. Chapter 1 Getting Started 9