Choosing A Slot - 3Com LINKBUILDER 3C18500 User Manual

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Figure 3-1 Schematic Layout Of The Management Module

Choosing a Slot

Usually you may insert the management module in any vacant slot. But
if you use any ECS repeater modules in the MSH chassis, the
management module must be in the highest-numbered slot in the
chassis; that is slot 11. If it is not, the LED above the management
module will light pink, as will the LED above the highest-numbered slot
if that contains an ECS repeater module.
As you may not know what configuration you will use in the future, we
advise that you always install the management module in the
highest-numbered slot.
DUA1850-0AAA05
Installation 3-5