66 Block wiring cross connect punch down

66 block wiring cross connect punch down of phone cross connection run voice cables to the 66 blocks punch down pairs for voice and data Sellntell. 66 blocks for connection of phones and data. Mount these on the wall of your equipment room or phone closet and punch down all the phone connections you need, and expand from block to block with clips and wiring. Most units come with their own wall mount bracket.