UNICOM Electric GST-2402 - Manual (Page 13)

Figure 2-5. Mounting the Switch in an EIA standard 19" Rack
Note: For proper ventilation, allow about at least 4" (10 cm) of clearance on
the front and 3.4" (8 cm) on the back of the Switch. This is especially
important for enclosed rack installations.
Power On
Connect the power cord to the power socket on the rear panel of the Switch.
The other side of power cord connects to the power outlet. The internal power
supply of the Switch works with voltage range of AC in the 100-240VAC,
frequency 50~60Hz.
Check the power indicator on the front panel to see if power is properly
supplied.