Chapter 1 Introducing the ZyXEL Device
Use QoS to efficiently manage traffic on your network by giving priority to certain types of traffic and/or to particular computers. For example, you could make sure that the ZyXEL Device gives voice over Internet calls high priority, and/or limit bandwidth devoted to the boss’s excessive file downloading.
1.5 LEDs (Lights)
The following graphic displays the labels of the LEDs.
Figure 2 LEDs on the Top of the Device
None of the LEDs are on if the ZyXEL Device is not receiving power.
Table 1 LED Descriptions
LED | COLOR | STATUS | DESCRIPTION |
POWER | Green | On | The ZyXEL Device is receiving power and ready for use. |
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| Blinking | The ZyXEL Device is |
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| Red | On | The ZyXEL Device detected an error while |
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| a device malfunction. |
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| Off | The ZyXEL Device is not receiving power. |
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ETHERNET | Green | On | The ZyXEL Device has an Ethernet connection with a device on |
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| the Local Area Network (LAN). |
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| Blinking | The ZyXEL Device is sending/receiving data to /from the LAN. |
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| Off | The ZyXEL Device does not have an Ethernet connection with |
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| the LAN. |
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DSL | Green | On | The DSL line is up. |
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| Blinking | The ZyXEL Device is initializing the DSL line. |
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| Off | The DSL line is down. |
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INTERNET | Green | On | The ZyXEL Device has an IP connection but no traffic. |
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| Your device has a WAN IP address (either static or assigned by a |
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| DHCP server), PPP negotiation was successfully completed (if |
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| used) and the DSL connection is up. |
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| Blinking | The ZyXEL Device is sending or receiving IP traffic. |
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| Red | On | The ZyXEL Device attempted to make an IP connection but |
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| failed. Possible causes are no response from a DHCP server, no |
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| PPPoE response, PPPoE authentication failed. |
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| Off | The ZyXEL Device does not have an IP connection. |
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Refer to the Quick Start Guide for information on hardware connections.
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