3com NJ240FX 用户指南
Checking the LEDs
9
Checking the LEDs
You can verify the NJ240FX installation by checking the LEDs.
LED
Description
(LAN)
n
On—the IntelliJack is connected to the network and a link has
been established.
been established.
n
Off—there is no connection to the network.
(Power)
n
On—the IntelliJack switch is receiving power. When you first
connect power to the IntelliJack, there is a delay of
approximately 5 seconds. The power LED light blinks once or
twice before remaining solid on.
connect power to the IntelliJack, there is a delay of
approximately 5 seconds. The power LED light blinks once or
twice before remaining solid on.
n
Off—the IntelliJack is not receiving power.
(Power-forwarding)
n
On—the IntelliJack is connected to and is forwarding power to
an IEEE 802.3af-compliant device.
an IEEE 802.3af-compliant device.
n
Off—the IntelliJack is not connected to or is not forwarding
power to an IEEE 802.3af-compliant device.
power to an IEEE 802.3af-compliant device.
4, 3, 2, 1
PAN PORTS
n
On—a device is connected to the IntelliJack switch and a link has
been established.
been established.
n
Off—no link has been established.