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Home USA Telephone Wiring Color Code in 2019 CSRearJackOrangBlue-Copyright-440x611-IMG_0403

CSRearJackOrangBlue-Copyright-440×611-IMG_0403

The blue pair and orange pair are both connected to the telephone jack.

The blue pair and orange pair are both connected to the telephone jack. A splitter plugged into the jack will enable the use of two separate telephone lines.

Here the orange pair is connected as the primary telephone line