There are 8P8C copper SFP(+) modules so that isn't really a barrier. Anyway, what you're looking for is something more like: https://www.qnap.com/en-us/produc

There are 8P8C copper SFP(+) modules so that isn't really a barrier. Anyway, what you're looking for is something more like: https://www.qnap.com/en-us/product/qsw-1105-5t https://www.qnap.com/en-us/product/qsw-1105-5t