110 blocks are one type of punch blocks used to connect sets of wires in a structured cabling system. The “110” designation is also used to describe a type of insulation-displacement connector used to terminate twisted pair cables which uses a similar punch-down tool as the older 66 block. People are preffered to 110 blocks rather than 66 blocks in high-speed networks because they introduce less crosstalk and allow much higher density terminations, and meet higher bandwidth specifications. Many 110 blocks are certified for use in Category 5 and Category 6 wiring systems, even Cat6a. The 110 block provides an interconnection between patch panels and work area outlets.
Modern homes usually have phone service entering the house to a single 110 block, when it is distributed by on-premises wiring to outlet boxes throughout the home in series or star topology. At the outlet box, cables are punched down to standard RJ-11 sockets, which fit in special faceplates. The 110 block is often used at both ends of Category 5 cable runs through buildings. In switch rooms, 110 blocks are often built into the back of patch panels to terminate cable runs. At the other end, 110 connections may be used with keystone modules that are attached wall plates. In patch panels, the 110 blocks are built directly onto the back where they are terminated. Category 6 – 110 wiring blocks are designed to support Category 6 cabling applications as specified in TIA/EIA-568-B.2-1 with unique spacing that provides superior NEXT performance.
Both 66 and 110 blocks are insulation displacement connection (IDC) devices, which are key to reliable data connections. 66-clip blocks have been the standard for voice connections for many years. 110 blocks are newer and are preferable for computer work, for one thing, they make it easier to preserve the twist in each pair right up to the point of connection.
1. Although 66-clip blocks historically have been used for data, they are not an acceptable connection for Category 5 or higher cabling. The 110-type connection, on the other hand, offers: higher density (more wiring in a smaller space) and better control (less movement of the wires at the connection). Since more and more homes and businesses call for both voice and data connections, it is easy to see why it makes sense to install 110-type devices in most situations. Most cat5 jacks also use type 110 terminals for connecting to the wire.
2. The 110 block is a back-to-back connection whereas the 66 block is a side-by-side connection. The 110 block is a smaller unit featuring a two-piece construction of a wire block and a connecting block. Wires are fed into the block from the front, as opposed to the side entry on the 66 block. This helps to reduce the space requirements of the 110 block and reduce overall cost. The 110 block’s construction also provides a quiet front, meaning there is insulation both above and around the contacts. Since the quiet front is lacking on the 66 blocks, a cover is often recommended.
3. 110 blocks have a far superior labeling system that not only snaps into place but is erasable. This is particularly important for post-installation testing and maintenance procedures.
110 Connecting Blocks enable you to quickly organize and interconnect phone lines and communication cable, preserve the twists in each pair right up to the connection point. Plus, most networking cable equipment also use 110 type terminals for cable connections.