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1.4 LED Indicator Specifications

The LED indicators of the Switch include Power and

Link/Act. You can see their operating situation through

these LED indicators.

The following chart shows the LED indicators of the Switch

along with explanation of each indicator.

LED

Power

Link/Act

S21256 / S21289 User Manual

Color

Status

Green

—

OFF

Green

Blinking

ALLNET GmbH

Description

This indicator

lights when the

Switch powers on.

If this indicator is

not lighting,

please check the

AC power

connector to

ensure the correct

connection of the

power adapter.

The other devices

connect to the port

of the Switch.

The port is

transmit- ting or

receiving data

packets.