
3.2.2 External Backup Power Supply Connector
The backup power supply constantly monitors the status of the internal power supply. The backup power supply automatically provides power to the switch in the event of a power failure. Once the switch receives power from the backup power supply, it will not automatically switch back to using the internal power supply even when the power is resumed.
3.3 Front Panel LEDs
The LEDs are located on the front panel. The following table describes the LEDs on the front panel.
Table 2 Front Panel LEDs
LED | COLOR | STATUS | DESCRIPTION |
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BPS | Green | Blinking | The system is receiving power from the backup power supply. |
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| On | The backup power supply is connected and active. |
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| Off | The backup power supply is not ready or not active. |
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PWR | Green | On | The system is turned on. |
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| Off | The system is off. |
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SYS | Green | Blinking | The system is rebooting and performing |
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| On | The system is on and functioning properly. |
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| Off | The power is off or the system is not ready/malfunctioning. |
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ALM | Red | On | There is a hardware failure. |
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| Off | The system is functioning normally. |
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|
Gigabit Ethernet Ports |
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| |
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1000 | Green | Blinking | The port is sending/receiving data. |
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| On | The link to a 1000 Mbps Ethernet network is up. |
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| The link to a 10 Mbps Ethernet network is up when the 100 LED is |
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| on. |
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| Off | No Ethernet device is connected to this port or the port is |
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| transmitting at 100 Mbps. |
100 | Amber | Blinking | The port is sending/receiving data. |
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| On | The link to a 100 Mbps Ethernet network is up. |
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| The link to a 10 Mbps Ethernet network is up when the 1000 LED |
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| is on. |
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| Off | No Ethernet device is connected to this port or the port is |
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| transmitting at 1000 Mbps. |
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| ||
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LNK | Green | On | The port has a successful connection. |
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| Off | No Ethernet device is connected to this port. |
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ACT | Green | Blinking | The port is sending or receiving data. |
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| Off | The port is not sending or receiving data. |
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Chapter 3 Hardware Overview | 48 |