What is the difference between an RJ11 cable and an RJ12 cable?

Answer

The main difference between an RJ11 and RJ12 connectors is that the RJ12 is mostly used in System phones while then RJ11 is used for ADSL, telephone, and modem cables. The RJ12 has 6 Positions and 6 Conductors while the RJ11 has 6 Positions and 4 Conductors. However they are all of the same size and they are used as crimp connectors with gold pins used for telecoms, networking and occasionally low voltage lighting control applications.
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