Optimum Router Lights (Meaning & Fixes)

Optimum Router Lights

The Optimum router lights enable you to understand the current state of your internet connection as well as the device itself.

Optimum provides a separate router and modem to its client for their internet connection. The LED symbols/icons are located on the front side of the devices.

Understanding the meaning of these lights helps you to know whether there is an issue with your internet so that you can resolve it immediately.

For instance, when your router is turned on and ready to be used, the Power light will be solid green.

Additionally, the USB light is also solid green if a device is connected to the port. A red light on your router indicates an issue with your connection. 

This article helps you understand the meaning of the different lights on your router and some of the troubleshooting tips that you can follow in case of an issue.

Meaning of Optimum Router Lights

The following are the different light symbols found on Optimum routers, their meaning, how they should ideally behave, and how they correspond to the operation:

1. Power

When the power symbol shows a solid green light, it indicates that it is turned on and ready to connect to the network and be used.

However, if there is a red light on the power symbol, it means that there is an ongoing firmware update.

Therefore, wait for about 10 to 15 minutes for the update to finish, and ensure that the router is turned on during this time.

No lights on the power symbol means the router is not connected to the power outlet or turned off. Ensure the connections are firmly secured on both ends of the power cable.

In case of a factory reset, the power light will remain off for about 15 seconds. Wait for a few more seconds before unplugging/plugging any wires.

2. USB

A solid green light on the USB port means it is operational and an external device is connected to it.

If you see a blinking green light on the USB port, it indicates that the data is being transferred back and forth.

If there is no light on the port, it means it is not in use. However, if there is an external device connected to the port, but the light is still off, the port could be having a hardware issue, or the external device is faulty.

To solve the hardware problem, contact the router manufacturer or ISP.

3. WPS

A solid green light on the WPS symbol means the WPS is active and can be used to authenticate devices.

A blinking green light means that there is an ongoing device pairing and WPS verification. When the WPS is disabled or inactive, there will be no lights on the symbol.

To prevent any security threats, the WPS is disabled by default. To enable it, go to Admin Portal > Wireless Settings > WPS > Turn it on.

4. Wireless

When the wireless light is solid green, it means that the WiFi bands (5 GHz and/or 2.4 GHz) are active and in use.

When the light is blinking green, it indicates that the client devices are sending or receiving data using the wireless channel.

No wireless light means there is a problem, or the WiFi is disabled. Log into the admin portal of your router to enable the WiFi.

5. LAN or Ethernet

When the ethernet port is ready for use and connected to a device, it will show a solid green light. A flashing green light on the ethernet port means that there is transmission of data using an ethernet cable.

When the ethernet port is not in use, there will be no lights on the ethernet/LAN port.

If there is a device connected to the ethernet port but you do not see any lights, it means that the router cannot detect the device.

Additionally, there could be damaged or loose cables or issues related to the port.

Follow the steps below:

  • Tighten a loose cable.
  • Replace a damaged cable.
  • If there is no issue with the cable, clean the ethernet port.
  • If the port is still not working, then the hardware is faulty. Therefore, claim the warranty and replace the router.

6. WAN or Internet  

If the Internet/WAN light is solid green, it shows that the internet connection is operational and active.

A solid red light means the router is having issues connecting to the internet. So, check with your internet service provider if there is an ongoing maintenance or internet outage.

An Internet/WAN light that is flashing green means that there is an active data transmission. If there are no WAN/Internet lights, then you do not have an active internet.

Follow the steps below:

  • Contact your ISP for resumption of services or activation.
  • Check if the ONT or coaxial terminal has an issue.
  • If you have active internet but the lights are off, try updating the firmware.
  • If none of the above solutions work, do a factory reset.
  • Replace the device as the last solution.

Meaning of Optimum Modem Lights

1. Power

A solid green light on the power symbol means that the modem is connected to the power outlet and turned on.

If there is no light on the power symbol, it indicates that the device is unplugged from power or turned off.

If the modem is powered but the light does not show, check the power cables to ensure they are intact.

2. US (Upstream)

The solid green light on the US symbol means that the upstream channel is active, and your modem is now ready to upload data. If the upstream light is blinking green, the device is initializing the upstream channel.

If the light keeps on blinking and does not become solid, then you may have issues with your internet.

Check for maintenance schedules and outages, ensure that the cables connecting the router and modem are secure, and check the heat vents for any blockages.

3. DS (Downstream)

When the DS symbol has a solid green light, it shows that your modem has created an active downstream channel for downloading data.

During the initialization process, your Optimum modem will blink green. If the blinking does not stop, then there is a problem connecting to the servers.

To resolve this issue, check for any faulty cables or loose connections, replace any older cables, and contact your provider to check if there are any ongoing outages and maintenance.

4. Online

When the online light is showing a solid green light, it means that your internet is active and working properly.

When there is no light on the Online symbol, then there is no internet connection on your modem.

To fix this problem, try updating the firmware, doing a manual reset, checking for loose or damaged connections, or waiting if there are any service outages or disruptions.

5. Tel 1 & Tel 2

A solid green light on the Tel 1 & Tel 2 symbol means that the telephone is connected to the modem and that you have an active voice service.

A flashing green light means the phone is off the hook or there is an active call on the port.

When there is no light on Tel 1 & Tel 2, it shows your voice service is disabled or the telephone port is not active.

Therefore, call your provider to activate voice services, but if the services are active, check the cable or phone for any damage and request a replacement if that is the case.

6. Ethernet

A solid amber or green ethernet light means that you have an active internet connection.

A flashing amber or green light indicates an active data transmission on the ethernet port. When the ethernet port is not in use, you will not see any light.

Additionally, there will be no ethernet light in case of cable-related issues or port failure.

General Troubleshooting Tips for Your Optimum WiFi

The following are some of the solutions if you are having issues with your internet connection:

  1. If you are using a wireless connection and your device is not connecting to the internet, remove any obstacles or obstructions between your device and router, and/or move your device closer to the router.
  2. Turn the WiFi off on your device’s settings and then turn it on, choose your home network, and re-enter the password carefully.
  3. Try connecting your device directly to your router using an ethernet cable.
  4. Unplug your router from the power supply, leave it for a minute, plug it back, and then try connecting your device to the network.
  5. Disconnect all the devices connected to your home network and then connect them one by one to see whether the issue is with a specific device.
  6. Run a speed test to know the speed of your internet connection.
  7. Contact your ISP for assistance.

Frequently Asked Questions

What are the ideal lights on Optimum WiFi?

You will see solid green if there is an active WiFi band. When there is data transmission between client devices and the WiFi band, the lights will blink green.

What to do if all the lights on your Optimum router are red?

Red lights could mean firmware or hardware-related issues. Therefore, check if you need to update your firmware, and if this does not solve the problem, try performing a manual reset.

The last solution is to contact Optimum to replace the router if it is under warranty.

Final Words

Understanding the status lights of your Optimum router and modem will enable you to know their working condition.

A solid green light on your WiFi device means that it is turned on and working properly. A flashing green light means that there is data transmission between your router and client devices.

However, if the lights blink continuously for a longer time, then there is an issue with your internet.

So, check for any loose cables, damaged cables, or loose connections. Additionally, you should update your firmware and/or contact your ISP for help.

Daniele Besana

Daniele Besana

Daniele is a freelancer consultant with 15 years of experience in network security, customer support, Linux and Salsa. He worked for Juniper Networks in Netherlands, providing support and consultancy on security projects across Europe and Middle-East.

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