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#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.

CAT3 Voice Connecting Block, 110 Type - Up to 4 Pair

by Dynacom
SKU: PP7-2171-B4
Various lead times may apply to this product. Please contact us for more details.

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CAT3 Connecting Block, 110 Type

The CAT3 Connecting Blocks from Dynacom are designed for use with 110 punchdown wiring blocks. The 1-Pair, 2-Pair, and 3-Pair connectors can be used for voice applications only. However, the 4-Pair connector blocks can be used in data applications because of the ability to terminate the 4 conductors of the data cables. These connecting blocks allow for a cable to be terminated on to the connecting block, as opposed to being terminated directly on the 110 wiring block. Once terminated on the connecting block, the connecting blocks easily plug in to the 110 wiring block.

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.



  • For Voice Only (1, 2 and 3 Pair)
  • For Data Only (4 Pair)
  • Plugs Directly in to the 110 Wiring Block



Dielectric Strength 1.0KV AC RMS 60 Hz
Insulation Resistance > 100M Ω
Contact Resistance < 20M Ω
Temperature Range -10º to +60º C
Casing Material Polycarbonate, Flame Retardant, UL94V-0 Rated
Contact Material Phosphor Bronze
Contact Plating

Flasher with hard gold over 100µ inches of Nickel

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 CAT6 Connecting Blocks can be combined with a wide array of products such as:

What’s In The Box

What’s In The Box

  • Qty 1 - CAT3 Voice Connecting Block