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You can extend the cable upto 300m (1500ft)
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DB9
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RJ45
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1
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1 Blue
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2
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2 Orange
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3
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3 Black
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4
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4 Red
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5
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5 Green
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6
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6 Yellow
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7
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7 Brown
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8
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8 White
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9
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Any DB9 to RJ45 adapter will work. You usually have to pin them out yourself.
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