This is the detail page for one of over 225 audio interfaces covered in The Computer Audio Interface Guide, which also lists where to buy this interface used.
2 ch D/A output. XLR, 1/8" out. Inputs: AES (breakout cable), S/PDIF, ADAT. "Digital Thru" mode to send any digital input to the computer. Optional FireWire card. USB version discontinued as of 2009.