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Knowledge Base document #1167

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.

You can use your FRITZ!Box with integrated DSL modem not only on the DSL connection, but also on the fiber optic connection (Fiber to the Home, FTTH) with an additional fiber optic modem.

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 Connecting FRITZ!Box to the fiber optic modem

  1. Insert one end of a network cable into the 'LAN 1' port on the FRITZ!Box. Use the network cable supplied with the FRITZ!Box, for example.
  2. Insert the other end of the network cable into the LAN port on the fiber optic modem (ONT, Optical Network Termination).

2 Configuring the internet connection in the FRITZ!Box

Configuring the Telekom internet connection

These steps are only necessary if you are using the FRITZ!Box on a fiber optic line from Deutsche Telekom:

  1. Open the FRITZ!Box user interface.
  2. If the wizard for internet access does not start automatically, click on 'Wizards' and then on 'Configure the Internet Connection'.
    Calling up the FRITZ!Box wizard
  3. In the wizard, select 'Telekom' from the drop-down list.
  4. Enable the 'EMPFOHLEN: Automatische Einrichtung des Internetzugangs [...]' (RECOMMENDED: Automatic configuration of internet access) option in the 'Telekom Glasfaser-Anschluss' section. If you are not offered setup via EasySupport:
    1. Enable the correct connection type and click on 'Next'.
    2. Enter the account information you received from Telekom in the relevant fields.
  5. Click on 'Next' and follow the wizard's instructions.

Configuring the internet connection of a different provider

  1. Click on 'Internet' in the FRITZ!Box user interface.
  2. Click on 'Account Information' in the 'Internet' menu.
  3. Check whether your internet service provider is displayed in the drop-down list in the 'Internet Service Provider' section. If your provider is not displayed, select 'more internet service providers' first.
    • If your internet service provider is displayed in the drop-down list:
      1. Select your internet service provider.
      2. If account information is required, enter the account information you received from your internet service provider in the corresponding fields.
      3. Click on 'Change connection settings'.
      4. Enable the 'Via an external modem' option in the 'Internet connection' section, if this option is displayed.
    • If your internet service provider is not displayed in the drop-down list:
      1. Select 'other internet service provider'.
      2. Enable the 'Connection to an external modem or router' option in the 'Connected via' section.
      3. Enable the 'Establish own connection to the internet' option in the 'Operating Mode' section.
      4. If account information is required, enter the account information you received from your internet service provider in the corresponding fields.
        • If account information is not required, enable the 'No' option in the 'Account Information' section.
      5. If your internet service provider requires you to use a particular VLAN ID, click on 'Change Connection Settings', enable the 'Use VLAN for internet access' option, and enter the VLAN ID.
  5. Enter the speeds of your internet connection in the 'Downstream' and 'Upstream' fields.
  6. Click on 'Apply' to save the settings.

Now the FRITZ!Box uses the account information you entered to establish the internet connection. Then you can configure your phone numbers in the FRITZ!Box and connect your wireless devices with the FRITZ!Box.

3 Setting up telephony in the FRITZ!Box

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

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



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