RackSwitch G8124 Installation Guide
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Chapter 1: RackSwitch G8124 Description and Specifications
BPP-00018-01, December 2009
DC Power Supply
The DC Powered G8124 has two redundant 250W DC-DC power supplies, operating from
42V to 60V. Each internal power supply has a DC filter input on the rear panel. The DC power
sources are connected to the G8124 via the mating connector cable assemblies provided. One end of
the cable is connected to the G8124 and the three DC-input leads connect the DC-input power
supply to the site power source. The pigtail end of the cable is color coded, as follows:
Black: Negative (-48V)
Red: Positive
(return)
Green: Ground
Each power supply can be connected to a separate DC power source to mitigate the risk of down
time during a power failure. When used in a redundant configuration, the dual power supplies have
a load-sharing capability that allows each supply to operate at approximately 50 percent of full load.
Using redundant power can minimize the power disruption during a power supply failure and
extend the expected lifetime of each supply by operating normally in a conservative power mode.
There is no power switch on the G8124; the switch unit powers up when power is supplied through
the DC power source.
The Power Supply LED indicates the status of the power supplies. The LED blinks when only one
DC power source is connected, and lights steady when both DC power sources are connected.
Switch Ports
The RackSwitch G8124 switch ports and port options are described below.
SFP+ Slots
24 Small Form-factor Pluggable (SFP+) slots are located on the front panel. These slots accept
approved copper SFP transceivers, optical SFP+ transceivers, or Direct Attach Cables (DAC).
Warning—
Only trained and qualified personnel can connect this equipment to the site
power source.
