самое смешное, что он, наверняка, рабочий. у меня вот mp3 плеер втыкаемый через удлинитель - работает, а cardreader - нет. (я в електронике не копенгаген, но, сдается мне, все дело в падении силы тока в удлинителе =)
It's true. There's even a discussion in the spec with the cable diameter and length.
USB also has a timing limit due to the speed of light. So, if your cable is made out of silver-coated copper and is a couple of meters thick, it can be 12.5m long (although, it's the network diameter actually...)
But in reality, the cable resistance limits it. This is precisely why extenders are outlawed by the spec. People still use them, and then complain on the blogs.
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Если линукс телефон не видит, то уже несколько лет как это означает проблемы с проводами.
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у меня вот mp3 плеер втыкаемый через удлинитель - работает, а cardreader - нет. (я в електронике не копенгаген, но, сдается мне, все дело в падении силы тока в удлинителе =)
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USB also has a timing limit due to the speed of light. So, if your cable is made out of silver-coated copper and is a couple of meters thick, it can be 12.5m long (although, it's the network diameter actually...)
But in reality, the cable resistance limits it. This is precisely why extenders are outlawed by the spec. People still use them, and then complain on the blogs.
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