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Setting up the FRITZ!Box for use with a fiber optic connection

You want to use the FRITZ!Box with a fiber optic modem? ✔ It's easy with this guide.

Not only can you use your FRITZ!Box with an integrated DSL modem on a DSL line, you can also use it with an additional fiber optic modem on a fiber optic connection (Fiber to the Home, FTTH).

Since the FRITZ!Box establishes and controls its own internet connection over the fiber optic modem, all FRITZ!Box functions (such as firewall, telephony) are also available without restriction in this operating mode.

Note:All instructions on configuration and settings given in this guide refer to the latest FRITZ!OS for the FRITZ!Box.

1 Configuring the internet connection in the FRITZ!Box

  1. Open the FRITZ!Box user interface.
  2. Enter the password given on the type label of the FRITZ!Box and click "Log In".
  3. If the wizard for internet access does not start automatically, click "Wizards" and then "Configure the Internet Connection".
    Calling up the FRITZ!Box wizard
  4. If your internet service provider is displayed in the drop-down list, select your internet service provider. If your provider is not listed, select "more internet service providers".
    • If your internet service provider is not displayed in the drop-down list, select "other internet service provider".
  5. Click "Next" and follow the wizard's instructions. The wizard guides you through the configuration of the internet connection and indicates when to use a network cable to connect the fiber optic modem to the "LAN 1" port on the FRITZ!Box.

2 Setting up telephony in the FRITZ!Box

If you want to connect telephones to the FRITZ!Box and use them to make calls over the internet:

  1. Configure the internet telephone numbers in the FRITZ!Box.