AVM FRITZ!Fon C5 cordless phone

The FRITZ!Fon C5 is a high-end DECT cordless telephone designed specifically for use with the FRITZ!Box home networking ecosystem. The brand was founded in 1986 in Berlin, Germany, by four students—Johannes Nill, Peter Faxel, Ulrich Müller-Albring, and Jörg-Detlef Gebert—under the company name AVM (Audio Visuelles Marketing). Originally a pioneer in ISDN technology, the company became a household name with the launch of the FRITZ! brand in 1995, eventually dominating the German router market.

Historically, AVM has emphasized 'Made in Germany' quality, with hardware engineering and software development based in Berlin and significant manufacturing taking place in Europe, including sites like RAFI GmbH in Germany. As of late 2024, the company entered a new era after the founders arranged a succession plan, selling a majority stake to Imker Capital Partners, a European family office. In mid-2025, the company officially rebranded from AVM GmbH to FRITZ! GmbH to align its corporate identity with its highly successful consumer brand. The company remains headquartered in Berlin and continues to focus on its proprietary FRITZ!OS software and integrated smart home solutions.