Skip to content
#1 Source in low voltage wire and cable. Call us today to learn more about special offers.
#1 Source in low voltage wire and cable. Call us today to learn more about special offers.

Pre-Wired 66 Block, With Male or Female Amphenol Connectors, Up to 50 Pairs total

by Dynacom
SKU: PP7-1143-2FC
Various lead times may apply to this product. Please contact us for more details.
UL Listed RoHS Compliant

Picture shown is of the PP7-1144-2MC. Hinged Cover Sold Separately.

Some items may require minimum order quantities which can be changed in your shopping cart. 


Pre-Wired 66 Block with Male or Female Amphenol Connectors, 50 Pair

Dynacom's 66 block is a punch down block containing rows of four IDC style clips. It is used for terminating 22-26 AWG solid copper cross-connect station wiring for many types of phone systems. The Pre-Wired 66 Block is available with male or female connectors in a single or double configuration. Once the cross connect wires have been distributed to the proper terminals, a bridge clip is used to finish the terminations. A bridge clip is used to connect two center terminals of a split block, effectively completing the circuit and connecting the left and right side of the 66 block. The metal bridge clips can be easily removed in order to allow the service subscriber or the service provider to split a circuit or troubleshoot problem areas of the circuit. Pre-wired and unwired 66 Punchdown Blocks often require an 89B bracket to fasten and hold the wiring block firmly against the backboard or wall.

Additional Related Items

To complete your network, we have all the products you need, with full end to end solutions for Telco voice systems. We carry a wide array of Punch Down Wiring Blocks, Backboards, and CAT3 Cable.

If you are looking to quickly and easily install your CAT3 network or voice system, we have Pre-Wired Punchdown Blocks, Pre-Loaded Surface Mount Boxes, and Ethernet Splitters.

We also carry Telco tools and equipment for testing the integrity of a CAT3 network such as Telephone Line Testers, Punch Down Termination Tools and Professional Tool Kits.

We also carry a large assortment of items that work with Telco voice systems such as: Amphenol cables, Bridge Clips, Modular Cable, and other accessories that will help make your installation fast, smooth and organized.



  • Voice Grade
  • 50-Pair
  • Male or Female 'Amphenol-style' Connectors Available in Single or Double Configurations
  • USOC Wired
  • Cover Sold Separately



Temperature Range
Storage -40º to +70º C
Operation -10º to +60º C
Relative Humidity (Operational) Maximum Noncondensing 93%

Insulation Resistance 500 MΩ min. @ 100V d.c
Dielectric Withstanding Voltage 1000V RMS @ 60Hz for 1 min
Spring Wire Contact Resistance 20 mΩ Max
IDC Contact Resistance 2.5 mΩ Max

Total Contact Force 800 Grams for A 8 Wire Leads Minimum
Retention 50N (11 Ibf) for 60s ± 5s
Insertion / Extraction Life 750 Cycles Minimum
IDC Wire Gauge 22 ~ 26 AWG

Housing / Bezel High-Impact, Flame-Retardant Plastic, UL-94V0
Spring Wire Phosphor Bronze Alloy Plated with 50 Micro-inch of Gold Over 70~100 Micro-inch of Nickel
IDC Brass Plated with 100 Micro-inch of Sn

Additional Information

Telco Block Accessories

Telco blocks are utilized to connect phone systems to data networks. There are two popular forms of telco blocks: the 66 block and the 110 block. The 66 block is quite common in modern phone systems, as they simplify connecting multiple phone lines. The 66 block is also referred to as B-blocks, M-blocks, and as split-50 blocks. We also have Cable Distribution Spools, or mushroom posts for managing your cross connect wire. It is designed for mounting onto walls or other surfaces to help support and guide your cross connect wire. Our cable distribution spools are also ideal for Cat3 cable for telephone applications.

To learn more about our Telco Block Accessories please visit our overview page. Our CAT5E 110 Wiring Blocks can be combined with a wide array of products such as:

What's in the box?

What's in the box?

  • Qty 1 - Pre-Wired 66 Block, With Male or Female Connector