D-Link DGS-3120-48PC Hardware Installation Guide - Page 15

xStack® DGS-3120 Series Layer 2 Managed Stackable Gigabit Switch Hardware Installation Guide LED Power Console RPS Master S1 S2 Fan SD Stack ID Link/Act LEDs PoE Figure 1- 12. LED indicators for the DGS-3120-48PC Description This LED will light green after powering the Switch on to indicate the ready state of the device. The indicator is dark when the Switch is no longer receiving power (i.e. powered off). This LED will blink green during the Power-On Self Test (POST). When the POST is finished, the LED goes dark. The indicator will light steady green when a user is logged in through the console port. This LED will light green if the Redundant Powers Supply is in use. If the indicator is off, the RPS is not in use. When the switch detects that the RPS is connected, the light will be blinking. This LED in not available on the DGS-3120-24SC-DC switch. For standalone Switches, this will light green. For stacked Switches, a solid Green light indicates this unit is the Master of the stack. A solid green stacking port 1 LED indicates there is a secure connection (or link) to an Ethernet device at any of the ports. The LED blinks green where there is reception or transmission of data occurring at a port. A darkened LED indicates no link on this stacking module. A solid green stacking port 2 LED indicates there is a secure connection (or link) to an Ethernet device at any of the ports. The LED blinks green where there is reception or transmission of data occurring at a port. A darkened LED indicates no link on this stacking module. This LED blinks red when a fan fails. No light indicates all fans are working normally. This LED will light green if a Secure Digital (SD) card is plugged in. When the Switch is reading or writing, the indicator will blink green. No light LED means there is no link. A solid red LED indicates SD card failure. For standalone Switches, this will display number "1". For stacked Switches, this indicates the position in the stacking box ID. The box ID is assigned either by the user (static mode) or by the system (automatic mode). When "1" to "6" is displayed, this indicates the stacking position of the switch. An "H" indicates the device was assigned as the stacking Master. "h" means the device was selected to be the Backup Master. A "G" is displayed when the Safeguard Engine feature enters the exhausted mode. The Switch has LED indicators for Link and Activity. The LED will light steady green when there is a secure connection (or link) to a 1000Mbps Ethernet device at any of the ports, or steady orange when there is a secure connection (or link) to a 10/100Mbps Ethernet device at any of the ports. The LED will blink green when a 1000Mbps port is active, or blink orange when a 10/100Mbps port is active. The LED remains dark when there is no link or activity. Only the DGS-3120-24PC and the DGS-3120-48PC switches are equipt with a PoE LED. When this light is on with a solid green light, it means that the corresponding ports are feeding power to the PoE devices plugged in. When this light is on with a solid orange light, it means that the port is in an error condition state. When this light is off, it means that the ports are not supplying power to the devices plugged into the ports. 7