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One of my ethernet cables starting malfunctioning, so I decided to replace it. The problem is, it turns out that the old cable is neither straight nor cross. It has all pairs mirrored (1-8 2-7 3-6 4-5 5-4 6-3 7-2 8-1). I narrowed the problem down to ethernet extender (like the one here: )
which, if disassembled, has a circuit board inside that also mirrors all pairs. So the cable is mirrored basically to fix mirroring inside extender.
The question is, what is all that? Where does it come from? Is it described by some standard? The extender is factory-made, and the cables are definitely not made by trial and error.
1Nice. (Well, not really. I'd say those technicians should adhere to the standards, or be laid off.) Any chance you can fix the cabling in some wall outlet instead? – Arjan – 2014-08-03T17:06:56.277
Was the wiring there before the internet service? If not, it might have been originally used for phone wiring. In the past, phone techs used cat 3 cables for phones, since it can be used for up to 4 phone lines. – Keltari – 2014-08-03T20:07:42.650
The wiring was laid by internet provider. I'm thinking to make a wall socket that fixes wire layout as suggested. – Codeguard – 2014-08-03T21:27:37.177
1i think they do this simply to prevent customers from using there Network together with an other Providers Services (they may be thinking that the other Provider doesn't know their Cable changings) – konqui – 2014-08-04T05:56:16.933