3Com 3C16430 User manual

S U P E R S T A C K II P O R T S W I T C H H U B
H O T S W A P C A S C A D E U N I T
3C16430
U S E R G U I D E
Hot Swap Cascade Units are for use with SuperStack II Port Switch Hubs. They
connect your cascade cables together, forming a resilient cascade, to which you
connect your Port Switch Hubs. You can add and remove hubs without affecting
stack performance, and if a hub fails, the cascade information continues to flow
between the other hubs.
The Hot Swap Cascade Unit is refered to as ‘cascade unit’ in this User Guide.
Assembling the Cascade Unit
The cascade unit is packaged with two long lockscrews. Push them through the
holes in the cascade unit (as shown below) until they lock in place.
Dimensions
Hot Swap Cascade Unit
UP
DOWN

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
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