Amber
Solid
Active connection at 10/100 Mbps
through the port.
Blinking
Data transmitted and received at
10/100 Mbps through the port.
Off
Inactive connection or no link
present.
PD
Green
Solid
Receiving DC power from PoH PSE
connected to the MGMT port.
Off
No PoH PSE connection is present.
Amber
Solid
PSE is connected, but power supply
failure has occurred.
Off
No PoH PSE connection is present.
Side Panel Description
The left-hand panel of the switch has heat vents to dissipate heat. Do not block these
openings, and leave at least 15 cm of space at the rear and sides of the switch for proper
ventilation. Be reminded that without proper heat dissipation and air circulation, system
components might overheat, which could lead to system failure. Also the left- and right-
hand panels of the switch have two fans and rack-mounting screw holes.
Figure 3 — DGS-1520-52 side panels
Switch Installation
This section will discuss the hardware installation guidelines that the user must follow in
order to properly and safely install this switch into the appropriate environment.
Visually inspect the power cord and see that it is fully secured to both the power
connector, on the Switch, and the electrical outlet that supplies power.
Install the Switch in a fairly cool and dry place within the acceptable operating
temperature and humidity ranges.
Install the Switch in a site free from strong electromagnetic field generators such as
motors, vibration, dust, and direct exposure to sunlight.
5
