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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. [1]
Typical functionality of a Fritz!Box includes:
Many Fritz!Boxes offer wireless repeater functionality 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 firmware versions.
IPv6 support was enabled from firmware version 4.90 onwards.
Fritz!Box devices operate under the control of Fritz!OS, a specialized Linux distribution, which provides a graphical web interface for user interaction.
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 provides support for POTS and usually ISDN for voice. While the international version supports 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 sole standard used in Germany, with additional support for Annex J in newer models.
Integrated Services Digital Network (ISDN) is a set of communication standards for simultaneous digital transmission of voice, video, data, and other network services over the digitalised circuits of the public switched telephone network. Work on the standard began in 1980 at Bell Labs and was formally standardized in 1988 in the CCITT "Red Book". By the time the standard was released, newer networking systems with much greater speeds were available, and ISDN saw relatively little uptake in the wider market. One estimate suggests ISDN use peaked at a worldwide total of 25 million subscribers at a time when 1.3 billion analog lines were in use. ISDN has largely been replaced with digital subscriber line (DSL) systems of much higher performance.
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