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Knowledge document #3671

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

The FRITZ!Box is optimally prepared for use with KPN. Simply connect the FRITZ!Box to the fiber optic connection, select KPN as the internet service provider in the FRITZ!Box, and configure telephony.

The complete FRITZ!Box range of functions for internet, telephony, and smart home is then available to all of the devices in your home network without restriction.

Requirements / Restrictions

  • A FRITZ!Box with the SFP module "FRITZ!SFP AON" is required for AON fiber optic connections.
  • The FRITZ!Box cannot be used directly with GPON or XGS-PON fiber optic connections. However, on these connections you can configure the FRITZ!Box for the Internet connection via "WAN" and use it behind the fiber optic modem from KPN.

1 Inserting the SFP module into the FRITZ!Box

The FRITZ!Box is available in several different product variants, each of which is delivered with different components. If there was no SFP module inserted in your FRITZ!Box, perform the following steps:

  1. Insert the SFP module "FRITZ!SFP AON" into the fiber slot of the FRITZ!Box.
    Inserting the SFP module into the FRITZ!Box

2 Connecting the FRITZ!Box to your fiber optic connection

  1. Remove the dust protection caps from the fiber optic cable, the SFP module in the FRITZ!Box, and from the fiber optic socket (OTO).
  2. Connect the fiber optic cable to the SFP module in the FRITZ!Box and to the fiber optic socket. Do not bend the fiber optic cable and do not hold the ends of the cable in front of your eyes.

    Note:You can find information on selecting a suitable fiber optic cable in our guide Which fiber optic cable do I need?

    Connecting the FRITZ!Box to the fiber optic connection

3 Plugging the FRITZ!Box in

  1. Plug the power adapter into the FRITZ!Box's power socket and plug it into a power outlet.

4 Activating the FRITZ!Box

5 Configuring the internet connection in the FRITZ!Box

  1. Open the FRITZ!Box user interface.
  2. Enter the FRITZ!Box 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. Select "KPN" from the drop-down list.
  5. Click "Next" and follow the wizard's instructions.
  6. Now the FRITZ!Box checks whether the internet connection can be established. Configuration is complete as soon as the message "The internet connection check was successful" is displayed.

    Important:If the internet connection check fails, your internet access may not have been activated yet. In this case, contact KPN.

6 Setting up telephony in the FRITZ!Box

Having your login information ready

  1. Have the login information for telephony that you received from KPN ready (for example the username and password).

    Note:KPN sent you the login information via email after you concluded the contract with them. If you did not receive your login information, contact KPN.

Configuring telephone numbers

  1. Click "Telephony" in the FRITZ!Box user interface.
  2. Click "Telephone Numbers" in the "Telephony" menu.
  3. Click the "New Telephone Number" button.
  4. Select "KPN" from the drop-down list.
  5. Enter your telephone number including the area code by "Telephone number".
  6. Enter the login information you received from KPN by "Username" and "Password".
  7. Enter your area code by "Area code".
  8. Click "Next" and follow the wizard's instructions.

Assigning telephone numbers

  1. Click "Telephony" in the FRITZ!Box user interface.
  2. Click "Telephony Devices" in the "Telephony" menu.
  3. Click the (Edit) button for the respective telephony device.

    Important:If the telephony device was not configured yet, click the "Configure New Device" button and follow the wizard's instructions.

  4. From the drop-down list "Outgoing Calls", select the number to be used by the telephony device for making outgoing calls. If you do not select a telephone number, the number entered under "Telephone Numbers > Line Settings" is used for making calls.
  5. Select the telephone numbers to which the telephony device should react when you receive calls. You can select up to ten numbers (including the number for outgoing calls).
  6. Click "Apply" to save the settings.

7 Setting up television (KPN iTV)

These steps are only necessary if you ordered interactive television reception (KPN iTV) and you are using the FRITZ!Box on a passive XGS-PON fiber optic connection from KPN:

  1. Use a network cable to connect the media receiver to a LAN port on the FRITZ!Box.

    Note:If you cannot connect the receiver and FRITZ!Box by cable, you can also connect them via Wi-Fi or your home's electrical wiring, for example with a FRITZ!Repeater or FRITZ!Powerline.