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Modem Reset

Please be aware that individuals pertaining to be from eir are calling people in relation to a modem security breach. The caller proceeds to ask the individual to switch on their PC/Laptop for remote access. This caller is not from eir and is fraudulent activity.

eir is not making outbound calls on modem security and would never ask for a customer to divulge their IP address or password information.

These calls have been reported to the eir Fraud team.

You may recently have been informed of a security vulnerability identified on a limited number of our broadband modems, the Zyxel D1000 and Zyxel P-660HN-T1A.

As the security of your data and modem is paramount to us, we have taken a number of steps already to protect you and other customers potentially impacted by this vulnerability. This includes applying a security filter onto our network and an upgrade to the modem software.

As an additional security measure it is imperative that you take the following actions immediately.

  1. Change your modem admin and WiFi passwords. Instructions on how to do this can be found at
  2. Reset your modem (instructions below)

Instructions on how to reset your modem are available below.

(Please Note: While performing these steps, you will lose your Internet connection, so please take note of all steps before starting the process).

Step 1: Check your modem type – D1000 or P-660HN-T1A. This is on the label on the underside of the modem.

Step 2: Turn the modem power off before proceeding. The on/off button can be found at the back of the modem.

Step 3: Remove the network cable from the grey-coloured DSL slot at the back of the modem.

Step 4: Turn the modem back on.

Step 5: Locate the reset hole.

D1000 - on the right hand side of the modem.


P-660HN-T1A – at the back of the modem.


Step 6: Push a ballpoint pen or a paperclip into the reset hole and hold for 10 seconds.

Step 7: Release the ballpoint pen or paperclip from the reset hole.

Step 8: Wait for a few minutes until the lights on the modem are no longer blinking and are showing solid.

Step 9: Re-insert the network cable into the DSL slot at the back of the modem. After re-inserting the cable, the DSL light on the front of the modem will begin to blink.

Step 10: Once this light is solid, you will notice the internet light to the right of it will turn red for approximately 20 seconds.

NB Step 11: If the internet light remains red for longer than 20 seconds you will need to turn the power on and off again.

Once the internet light is solid green, your modem is reset.

Step 12: Once you have reset your modem, you need to change both your modem administration password as well as your WiFi password. These should be strong and different passwords. Instructions on how to change both passwords are available on the support page of our website at

Below you will find videos which demonstrate how to reset both the Zyxel DS1000 and Zyxel T1 modems.

You will also find answers to FAQs below.

You can download these videos to your PC/Laptop or device by right clicking and choosing 'Save Video'.

eir Modem FAQs

My internet light is still red?

Turn the power on and off again. This should resolve the issue. The on/off button can be found at the back of the modem.

I need help re-connecting my mobile device to Wi-Fi?

Visit Smartphone Help for step by step Wi-Fi setup instructions.

My Windows PC does not show my Wi-Fi network after resetting my modem or password?

For windows 7 & 10 customers. You may need to update your windows wireless adaptor. For this you need to:

  • Connect your PC or Laptop via ethernet cable to your modem - this is usually a yellow cable that was supplied with your modem
  • Watch this video or follow these steps on your PC or laptop:
    • Open your device manager. You can navigate to this by searching Device Manager in the search box on your taskbar
    • Select Network adapters,right click on the adapter listed and select Update Driver Software
    • Select Search automatically for updated driver software. Follow the steps, then select Close.
    • After installing the updated driver, select the Start button > Power > Restart if you're asked to restart, and see if that fixes the connection issue
  • Now click the network icon in the system tray and select your home wifi network
  • Click Connect and enter your new WI-FI password to complete the connection

Still want to chat?

Click on the link below to open a conversation with one of our customer care team.

Opening hours: Monday to Friday 8am to 10pm. Saturday and Sunday 9am to 6pm.