$16.95
A Modular Duplex Jack is a dual phone adapter that you absolutely need in your life to connect your telecom devices to a single wall jack. It can be used with Extension cords to increase the length with a firm fitting connection.
Note: Most homes are wired for 1 or 2-line service. For 3 lines, the home or office must be wired with 6 conductors or 8 conductors for 4 lines.
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