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Using Cascade Units
Cascade units are quick and easy to use. You need:
■
One cascade unit for each hub in the stack.
■
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):
■
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.
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.
Never disconnect any of the cascade cables from the cascade units, when the stack is
in use, because doing so will break the cascade. If you want to remove a hub,
unscrew the cascade unit’s long screws and separate the cascade unit from the hub.
Hot Swap Cascade Unit
UP
DOWN
Hot Swap Cascade Unit
UP
DOWN
Hot Swap Cascade Unit
UP
DOWN
DOWN
DOWN
UP
UP
Hot Swap Cascade Unit
UP
DOWN
Hot Swap Cascade Unit
UP
DOWN
Hot Swap Cascade Unit
UP
DOWN
DOWN
DOWN
UP
UP
B
A
Part No. DUA1643-0AAA01 / Published July 1996
© 3Com Ireland, 1996. All rights reserved. No part of this documentation may be reproduced in any form or by any
means or used to make any derivative work (such as translation, transformation, or adaptation) without permission
from 3Com Ireland. 3Com is a registered trademark of 3Com Corporation. SuperStack is a trademark of 3Com
Corporation. Unless otherwise indicated, 3Com registered trademarks are registered in the United States and may or
may not be registered in other countries.