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Types of Master Socket

There are two main types of master socket and then there are subdivisions of each type. The main two types are NTE5 and LJU (old type). 

A LJU socket will have a flat surface with 2 screws in either side and a phone socket in the middle.

An NTE5 socket will have the screws and socket below the middle and also have a horizontal "divide" in the middle. There are filtered and non-filtered NTE5 faceplates, as well as different filtered types.

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