H3C Technologies H3C S12500 Series Switches - Manual (Page 17)

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Figure 6 S12518 rear view
(1) Power entry modules (PEMs) (2) Upper fan tray
(3) Switching fabric module slots (slots 20 to 28) (4) Lower fan tray
(5) Ventilation panel
(6) Grounding screw
(7) ESD-preventive wrist strap port (8) Chassis air exhaust vents
(9) Power supply air exhaust vents
The S12518 chassis has the following slots and components: