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SCSI is a fast, powerful interface - there's no doubt about that. But its distance limitations can be severe, and its different "flavors" don't get along very well. If you're tired of not being able to put Ultra2 SCSI low-voltage differential (LVD) devices where you want to, or of not being able to use them with your older SCSI devices, Black Box has a box that can help.
The Ultra2 SCSI LVD Multimode Extender joins two SCSI buses so that they function as two segments of the same bus. Each segment can be either LVD or SE, because both of the Extender's ports are autosensing "multi-mode" type. So the Extender can work as a converter, allowing you to use newer and older SCSI devices at the same time. You can also use the Extender as a repeater. Because each attached segment can be as long as a full bus - depending on the data rate and number of devices, up to 25 m (82 ft.) for an LVD segment, or up to 6 m (19.7 ft.) for an SE segment - the Extender doubles the length you can run. You can even triple your distance by daisy chaining a pair of Extenders! The Extender has internal jumpers that you can use to control, for each attached SCSI segment, whether the segment is terminated internally at the Extender, or whether the Extender provides terminator power for the other end of the segment. If you choose not to terminate the bus at the Extender/Expander, you can use a multi-connector ribbon cable to attach the unit in the middle of a segment. The Extender doesn't require software or a SCSI ID. It supports arbitration, parity, disconnect/reconnect, and sync or async data transfers. It also has a front-mounted Power LED and Busy LED.