If your are coming across the problem of mismatched color codes between your existing wiring and your new connector there is a simple solution. There are two main color codes that have been used in the last 20 years , POTS (Plain Old Telephone Service) color code which will be a 4 or 6 wire cable with a red,green,black yellow colored wires and additional white and blue wire if it is a 6 wire. And Category-Rated color code which is a 8 wire cable that consists of 4 pairs or wire, blue, white blue, orange, white orange, green, white green, brown, and white brown these are commonly refered as a Cat5 or Cat6 cable depending on there category rating. You can use a Category rated cable to run phone or data but a POTS cable should only be used for telephone service. To use a POTS color code with a Category rated color code you simply need to use the below chart to match things up.