The IEEE-1394b repeater cable is not a passive extension cable. It could be cascaded (up to 10) to extend the distance of up to 50M (5M each cable) between IEEE-1394b devices and your computer, and regenerate the IEEE-1394b signal for maximum reliability and performance over extended distances at maximum transfer rate of 800Mbps. For more details on product, Please refer to http://www.papyrus.co.il/ieee-1394b_repeater_cable.htm