[. . . ] SUPERSTACK II PORT SWITCH HUB HOT SWAP CASCADE UNIT 3C16430 USER GUIDE Hot Swap Cascade Units are for use with SuperStack II Port Switch Hubs. [. . . ] A maximum of 6 meters (19. 6 feet) of cascade cabling (between the top and bottom hub). SuperStack II Port Switch Hub cascade cables are available in a variety of lengths from your supplier. To use your cascade units: 1 Connect the cascade units with the cascade cables (as shown in diagram A below): s Connect the cables' UP connectors to the UP ports of the cascade units. Connect the cables' DOWN connectors to the DOWN ports of the cascade units. s Secure the cables by tightening the cables' captive screws, finger tight. 2 Connect the cascade units to the back of the hubs (as shown in diagram B below). Tighten the cascade units' long screws to hold them firmly in place. A Hot UP B Swa p Ca scad DOW e Un it N N DOW Hot UP Swa p Ca scad UP Hot UP Swa p Ca scad DOW Swa p Ca e Un it N N DOW e Un it N N UP Hot UP DOW DOW scad DOW Swa p Ca e Un it N N UP Hot UP Swa p Ca scad e Un UP it Hot UP DOW scad e Un it DOW N DOW N Never disconnect any of the cascade cables from the cascade units, when the stack is in use, because doing so will break the cascade. [. . . ] Unless otherwise indicated, 3Com registered trademarks are registered in the United States and may or may not be registered in other countries. [. . . ]