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Is the cable that comes with the router a standard rj11? I had an old one that was longer than the one supplied but it didn't work. Wondering if I need a special type. The one supplied is too short to use where we need it.
It is standard, as in it is wired the same as any DSL cable that comes with a most modem/routers. It (like any DSL cable) is twisted pair and some RJ11 cables for other applications may not be, It only uses the centre 2 pins.
Longer DSL cables can be purchased on Amazon etc.
Wilko does a 3-meter cable, Argos does a 5 meter and amazon/eBay does any length. There are plenty of websites that say the twisted pair cable is better, I have used both straight and twisted and not really seen any evidence to actually say which is better (shorter cables will always pick up less interference )
The twisted pair is supposed to cut down interference from devices like power adapters, TV, microwave ovens Radio / Electromagnetic Interference, etc