...emulates up to two hundred fifty six (256) IBM 3390 DASD devices per channel interface. Thus a single zDASD with dual channel interfaces can support a total of 512 IBM 3390 devices. The zDASD also supports a feature called Alternate Pathing. This...
http://www.bustech.com/pdf/zDASD_WP_AG_2.pdf
...For IBM PC/XT/AT and Compatibles OMG-ACBII Click for larger image. $ 199.00 OMG-ACB-II Single and Dual Channel Interfaces Reliable Communication up to 5000 Feet (1.5 km) OEM Security Feature for Software Protection (OMG-ACB...
http://www.omega.com/ppt/pptsc.asp?ref=OMG-ACBII&nav=
...controller with four USB2.0 ports onboard and External front-panel with two USB2.0 ports Two Ultra ATA133 IDE dual channel interfaces, data transfer rate up to 133MB/sec 10/100Mbps LAN interface onboard. (LAN version only) overview...
http://www.leadtek.com/motherboard/winfast_k7ncr18dm_1.html