
INS_CNGE28FX4TX24MS(2,POE2/48)
04/30/18 PAGE 15
INSTALLATION AND OPERATION MANUAL
CNGE28FX4TX24MS(2,POE2/48)
TECH SUPPORT: 1.888.678.9427
2.4. Verifying Switch Operation
Before installing the device in a rack or on a wall, power on the switch to verify that the switch
passes the power-on self-test (POST). To connect the cabling to the power source see “Power
Supply Installation” on page 15.
At startup (POST), the System LED blinks green, while the remaining LEDs are a solidy green.
Once the switch passes POST self-test, the System LED turns green. The other LEDs turn off and
return to their operating status. If the switch fails POST, the System LED switches to an amber
state.
After a successful self-test, power down the switch and disconnect the power cabling. The switch
is now ready for installation on its final location.