Domestic Digital Bus (automotive)

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Domestic Digital Bus, D2B, is an isochronous ring-based fibreoptical communications technology, with a bandwidth of 12 Mbit/s, specified by the Optical Chip Consortium for use in automotive applications. As of 2007, D2B is used by Mercedes-Benz in their vehicles.

Mercedes-Benz is a German global automobile marque and a division of Daimler AG. The brand is known for luxury vehicles, buses, coaches, and trucks. The headquarters is in Stuttgart, Baden-Württemberg. The name first appeared in 1926 under Daimler-Benz. In 2018, Mercedes-Benz was the biggest selling premium vehicle brand in the world, having sold 2.31 million passenger cars.

D²B is an IEC standard for a low-speed multi-master serial communication bus for home automation applications. It was originally developed by Philips in the 1980s. In 2006 it has been withdrawn by IEC because another standard was proposed, JTC1 SC 83/WG1. There remain many IEC61030-compliant devices, such as some Philips-branded head units and CD changers from car stereos.

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