1-3
Ethernet ports and the four SFP ports comprise four Combo ports, with one port of a Combo port
working at a time.
Figure 1-1 Front panel of the S5120-28C-EI Ethernet switch
(1) 10/100/1000 Base-T auto-sensing Ethernet port
(2) 10/100/1000 Base-T auto-sensing Ethernet port status LED
(3) 1000 Base-X SFP port (4) 1000Base-X SFP port status LED
(5) Console port (6) Seven-segment LED
(7) Port mode LED (Mode) (8) System status LED (PWR)
(9) RPS status LED (RPS) (10) Interface module 1 status LED (MOD1)
(11) Interface module 2 status LED (MOD2) (12) Port status LED mode switching button
Rear Panel
Figure 1-2 Rear panel of the S5120-28C-EI Ethernet switch
(1) AC power input (2) RPS power input (shipped with a protective cover)
(3) Grounding screw (4) Interface module slot 1 (MOD1)
(5) Interface module slot 2 (MOD2)
The S5120-28C-EI provides two interface module slots on its rear panel. Each slot is installed with a
filler panel when the switch is shipped. You can select one or two interface modules for your switch as
needed. See
Optional Interface Modules on page 1-15 for the interface module models supported by
the S5120-EI series, and see
Installing an Interface Module on page 3-17 for the installation of interface
modules.
S5120-52C-EI
Front Panel
The S5120-52C-EI Ethernet switch provides 48 ×10/100/1000Base-T auto-sensing Ethernet ports, four
1000 Base-X SFP ports and one console port on the front panel. The last four 10/100/1000Base-T
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