Re: Ethernet Cable Question
Copper cables have a maximum run of 95-100 metres before the signal degrades and a repeater or switch would be required. If you've got a sub-100 metre CAT5E, CAT6 or CAT7 cable running between two decent (Fast ethernet/Gigabit) network devices and you're having speed issues - you've either got a bad cable, a lot of interference or one of your devices is having a problem.
Most consumer-available network cables are UTP (Unshielded twisted pair), so interference will be a problem if the cable is running alongside power cables (as electrical current creates a magnetic field) . The solution to this is STP (Shielded twisted pair), this is on the whole ever so slightly slower than unshielded, but it cuts out most of the interference.
RJ45 couplers are, for me, an absolute no-go for a number of reasons. The primary reason is that they tend to be crap and do not very often meet CAT5E/CAT6 specification themselves.
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