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MPO Polarity
According to TIA/EIA-598, it uses 12 colours to identify the different fibres in a unit or subunit.
| Fibre | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
| Colour | Blue | Orange | Green | Brown | Slate | White | Red | Black | Yellow | Violet | Rose | Aqua |
When the fibre number is more than 12, then add a tracer, normally it is a dash or dot.
| Fibre | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 |
| Colour | Blue | Orange | Green | Brown | Slate | White | Red | Black | Yellow | Violet | Rose | Aqua |
| Black tracer | Black tracer | Black tracer | Black tracer | Black tracer | Black tracer | Black tracer | White
tracer |
Black tracer | Black tracer | Black tracer | Black tracer |
Here take 12F MPO connector as an example to explain the three type of MPO polarity.
From left to right as viewed looking at the end face of MPO connector with the connector key up, the position 1~12 arrayed as the picture above.
TYPE A MPO polarity
Key up — Key down
TYPE B MPO polarity
Key up — Key up
TYPE C MPO Polarity
Key up —– key down Pair flip
