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## 12. Why won’t bestups talk to my Best Fortress UPS?

There are at least two different protocols being used for hardware with very similar names. The bestups driver tends to support the units built around the newer "PhoenixTec" protocol, and the bestfortress driver supports the older Best hardware.

There is a similar problem with the tripplite_usb driver: it only supports the older, proprietary protocol. Newer standards-compliant Tripp Lite UPS models are supported by usbhid-ups. We name drivers based on the information available at the time the driver was first written, which often is incomplete.

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