In local area networks or telecom closets, a punch down block is a device used to cross-connect groups of wires using a metal peg method (LAN).
What are the two types of punch-down blocks?
Short, open-ended slots that act as insulation displacement connections are punched with solid copper wires.
The network administrator may come across two of the 66 block and 110 block punch down blocks in some older systems' telecommunications closets.
Therefore, In a structured cabling environment, the cable runs come to an end in a punch-down block, typically a 66-block or a 110-block.
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