Punch-down blocks provide a convenient method to connect wires without removing the wire’s insulation or installing screws. These are largely used in key phone systems, most notably in PBX breakout boxes and 50-pin RJ-21 connectors.

Major Custom Cable’s 66 blocks are terminated with either one or two 25-pair cables, and legs are available for your specific needs. Our 110 type punch blocks make it easy to configure a compact and adaptable wall or backboard and are designed to support voice and high-speed data application. They are available in 25, 50, 100, 300, 600, and 900 pairs.

While both types function as punch-down blocks used in telephony to cross-connect electrical wires, 110 blocks are the modern and upgraded versions of the 66 block. The latter was designed for analog voice conversations, but the rise in usage of digital data communications shifted preference to the 110 block.

If you do not see a product suitable for your application, please contact us. Our extensive experience with 66/110 blocks allows us to offer custom solutions to meet any unique need.

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Checklist:

Category Type:	Cat 1, Cat 3, or Cat 5e
Size:	25, 50, 100, 300, 600, or 900 pairs
Clips:	C4 or C5
Legs:	With or Without
Length of Custom Configured Legs:	Feet, meters, inches, millimeters, etc.
If using Telcos for Legs:	Yes or No
Gender:	Male or Female
Hood Type:	90, 120, or 180
90 or 120 Hood:	Standard or Opposite Exit
Latch Type:	Screw or Bail Lock
Length:	Feet, meters, inches, millimeters, etc.
Special RJ45 or RJ11/12 Fan-out:	Yes or No
Custom Labels:	How many, position on the cable, and text or graphics required?
Custom Packaging:	Yes or No
Custom Kitting:	Yes or No