8
Product Overview
Cable Side
Display Mode Button
The Display Mode Button allows you to choose the mode you want displayed by the port LEDs (items 1-3 in
Figure 4 on
page 6
). The LEDs with green text to the left of the Button indicate the chosen display mode. Each time you press the
switch, the mode indicator moves from SPEED, DUPLX, REDUN, SYNCE, and PoE respectively.
Power-Supply Module LEDs
The switch power-supply module LEDs are labeled PSU1 and PSU2 (on the switch) and PSU OK (on the power-supply
module). They show whether power-supply modules 1 and 2 are receiving power.
PoE/PoE+
Off
PoE/PoE+ is off.
If the powered device is receiving power from an AC power source, the port LED
is off even if the device is connected to the switch port.
Green
PoE/PoE+ is on and all ports function correctly. The port LED is green when the
switch port is providing power.
Alternating green
and amber
PoE/PoE+ is on but one of the low priority ports power is disconnected or failed.
Blinking amber
PoE/PoE+ is on but one of the high priority ports power is disconnected or failed.
PoE+ faults occur when noncompliant cabling or powered devices are connected
to a PoE+ port. Use only standard-compliant cabling to connect Cisco prestandard
IP Phones and wireless access points or IEEE 802.3af/at-compliant devices to
PoE+ ports. You must remove from the network any cable or device that causes a
PoE+ fault.
Amber
PoE/PoE+ is on with failures.
PoE+ is enabled by default.
Table 3
Meaning of Switch LED Colors in Different Modes (continued)
Port Mode LED
Port LED Color
Meaning
Table 4
Power Supply Module LEDs
Color
System Status
Off
Power-supply module (1 or 2) is not installed.
Green
Valid input is present, and the output is within the operating range.
Red
Valid input is present, and the output is outside the operating range or is not present.
Blinking red
Power-supply module (1 or 2) is installed but valid input is not present.
