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Knowledge Base document #1167

FRITZ!Box 6690 Cable

This support document is available for the following products:

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 Cable not only on the cable 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.

Requirements / Restrictions

It is not possible to access the internet if account information or a VLAN ID is required. If account information or a VLAN ID is required, the FRITZ!Box cannot be connected directly to a fiber optic modem; it must be operated behind another router.
Some cable providers do not support this operating mode. The function 'Internet connection via "LAN 1"' is therefore not displayed if you have a FRITZ!Box from one of these providers.

1 Connecting FRITZ!Box to the fiber optic modem

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.
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

Click on 'Internet' in the FRITZ!Box user interface.
Click on 'Account Information' in the 'Internet' menu.
Enable the 'Internet connection via "LAN 1"' option.
Enter the speeds of your internet connection in the 'Downstream' and 'Upstream' fields in the 'Connection Settings' section.
Click on 'Apply' to save the settings.

Now the FRITZ!Box establishes 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:

Configure the internet phone numbers in the FRITZ!Box.

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