User manual
 Omni Switch/Router Chassis and Power Supplies
Page 1-13
OmniS/R-9 and OmniS/R-9P
The OmniS/R-9 and OmniS/R-9P chassis have nine slots for an MPX and switching modules 
(see figure below). Slots are numbered from 1 to 9 starting with the left-most slot. Slots for 
two power supplies are located at the bottom of the chassis. A separate, removable fan tray 
containing four fans is located above the power supply module bays.
The OmniS/R-9
A fully loaded OmniS/R-9 weighs nearly 100 lbs. Therefore, it is recommended that if you are 
rack-mounting the chassis you use a rack mount shelf instead of just brackets. Using a shelf 
will ensure that the weight of the chassis can be supported. In addition, the OmniS/R-9 
contains side handles to make lifting and installation easier.
The OmniS/R-9 uses the 
MPX. Slot 1 is reserved for the MPX; you cannot install a switching 
module in Slot 1. You can install a switching module in Slot 2 (if an MPX is installed in Slot 1) 
or an MPX. When dual-redundant MPXs are installed, one of them must be installed in Slot 1 
and the other in Slot 2. Slots 3 through 9 are reserved for switching modules.
♦ Important Note ♦
You must have an 
MPX acting as the management 
module; you cannot use any version of the MPM. See 
Chapter 2, “The Omni Switch/Router MPX,” for more 
information on the MPX.
Fan Tray
Lifting Handle
Omni Switch/Router 
Management Processor 
Module (MPX)
PS1 (Power Supply 1)
PS2 (Power Supply 2)
Switching Modules










