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Making Network Connections 3-5
Hub to
Management Unit
You can connect the hub (or a hub stack) to a Management Unit by using
the expansion cable. Connect the UP expansion port on the hub’s rear panel
to the DOWN expansion port on the Management Unit’s rear panel, as
shown in Figure 3-5.
3Com strongly recommends that you place the Management Unit on top of
the hub stack, so it will be unit number 1. This will ensure that existing
nonvolatile port configuration information is applied to the correct physical
unit in the stack.
Figure 3-5 Connecting a Hub Stack to a Management Unit
The maximum number of units in a stack is eight including the
Management Unit. If you wish, you can add two Redundant Power Systems
to a stack of eight units (seven hubs and one Management Unit, or eight
hubs with no other device).
!
®
3Com Corporation
Santa Clara, CA
Made in USA
REFER TO
INSTRUCTION MANUAL
FOR CORRECT
SELECTION OF
POWER CORD
CAUTION: For continued
protection against risk of fire
use only with same type
and rating of anti-serge fuse.
INPUT
V
A max
5
5.0
+12
2.5
–12
0.2
UP
DOWN
EXPANSION
DC INPUT
E
D
!
®
3Com Corporation
Santa Clara, CA
Made in USA
REFER TO
INSTRUCTION MANUAL
FOR CORRECT
SELECTION OF
POWER CORD
CAUTION: For continued
protection against risk of fire
use only with same type
and rating of anti-serge fuse.
INPUT
V
A max
5
5.0
+12
2.5
–12
0.2
UP
DOWN
EXPANSION
DC INPUT
E
D
!
®
3Com Corporation
Santa Clara, CA
Made in USA
REFER TO
INSTRUCTION MANUAL
FOR CORRECT
SELECTION OF
POWER CORD
CAUTION: For continued
protection against risk of fire
use only with same type
and rating of anti-serge fuse.
INPUT
V
A max
5
5.0
+12
2.5
–12
0.2
UP
DOWN
EXPANSION
DC INPUT
E
D
!
®
3Com Corporation
Santa Clara, CA
Made in USA
REFER TO
INSTRUCTION MANUAL
FOR CORRECT
SELECTION OF
POWER CORD
CAUTION: For continued
protection against risk of fire
use only with same type
and rating of anti-serge fuse.
INPUT
V
A max
5
5.0
+12
2.5
–12
0.2
UP
DOWN
EXPANSION
DC INPUT
E
D
Management
Unit
!
®
3Com Corporation
Santa Clara, CA
Made in USA
REFER TO
INSTRUCTION MANUAL
FOR CORRECT
SELECTION OF
POWER CORD
CAUTION: For continued
protection against risk of fire
use only with same type
and rating of anti-serge fuse.
INPUT
V
A max
5
5.0
+12
2.5
–12
0.2
EXPANSION
UP
Down
DC INPUT