Encyclopedia : 6 : 66 : 66B (3 articles)

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66 BC
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66 block
A split-50 M or 66 Block with bridging clips A 66 block (also M-Block) is a type of punchdown block used to connect sets of wires in a telephone system. 66 blocks accept 22 to 26-gauge solid wire. The 25 Pair standard non-split 66 Block contains 50 rows, each with a single clip having four ..

 

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