recently I found a cable in my drawer which one side has a RJ45 connector with an unknown color code of red brown black white green I tried to solve it by myself but I couldn't so I upload a picture if you can tell me what it is used for. Thanks
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2 Answers
That's no network cable.
Likely, it's a console cable, connecting a 10P10C(!) console port on a device to a USB port on a PC. It might be from a UPS (usually has a key next to pin 1) but unless you can verify the pinout I wouldn't connect it anywhere.
The wiring exactly match the one given on this page so it is most probably an APC UPS serial cable
APC part# 940-0127B, 940-127C and 940-0127E
APC Pin USB Pin Description
1 1 USB +5V (red wire)
4 shield chassis ground
7 4 USB GND (black wire)
9 2 USB Data- (white wire)
10 3 USB Data+ (green wire)
