ZyXEL Communications P-660R-11V3 User Manual

 Chapter 1 Introducing the ZyXEL Device

P-660R-T1 v3 User’s Guide

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.

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.

Refer to the Quick Start Guide for information on hardware connections. 

Table 1   LED Descriptions

POWER

Green

On

The ZyXEL Device is receiving power and ready for use.

Blinking

The ZyXEL Device is self-testing.

Red

On

The ZyXEL Device detected an error while self-testing, or there is 

a device malfunction.

Off

The ZyXEL Device is not receiving power.

ETHERNET Green

On

The ZyXEL Device has an Ethernet connection with a device on 

the Local Area Network (LAN).

Blinking

The ZyXEL Device is sending/receiving data to /from the LAN.

Off

The ZyXEL Device does not have an Ethernet connection with 

the LAN.

DSL

Green

On

The DSL line is up.

Blinking

The ZyXEL Device is initializing the DSL line.

Off

The DSL line is down.

INTERNET

Green

On

The ZyXEL Device has an IP connection but no traffic.
Your device has a WAN IP address (either static or assigned by a 

DHCP server), PPP negotiation was successfully completed (if 

used) and the DSL connection is up.

Blinking

The ZyXEL Device is sending or receiving IP traffic.

Red

On

The ZyXEL Device attempted to make an IP connection but 

failed. Possible causes are no response from a DHCP server, no 

PPPoE response, PPPoE authentication failed.

Off

The ZyXEL Device does not have an IP connection.