FRITZ!Box

Fritz!Box, stylised as FRITZ!Box, is a series of residential gateway devices produced by the German company AVM GmbH. In 2010 it was estimated the series had a market share of 68% of the digital subscriber line (DSL) consumer equipment in Germany.

Fritz!Box devices operate under the control of Fritz!OS, a specialized Linux distribution, which provides a graphical web interface for user interaction. Typical functionality of a Fritz!Box includes:

Many Fritz!Boxes offer wireless repeater function which, in earlier firmware versions, was compatible with the IEEE 802.11-1999 standard wireless distribution system before being replaced with a proprietary system in more recent firmwares.

IPv6 support was enabled from firmware version 4.90 onwards.

Fritz!Box devices with an integrated DSL modem come in three versions. The version for the German market uses an ISDN interface for voice. For the Austrian and Swiss markets the voice interface use traditional POTS and also has a German-language user interface. The international version has a multi-language web interface and has support for POTS and usually ISDN for voice. While the latter two versions support both the most common ADSL Annex A POTS and ADSL Annex B ISDN, the German version offers hardware support for Annex B only, which is the only one used in Germany, with additional support for Annex J in newer models.

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