#110 PUNCH BLOCK PATCH#

A Krone block is a proprietary European alternative.A 110 block is often used in residential telephone and Cat 5 wire systems, replacing 66 blocks.A 66 block (or 'M Block') is used in older analog telephone systems.In addition, punch-down blocks are being used to handle larger numbers of faster data signals, requiring greater care and proper procedures to control impedance and crosstalk. Once the contact blades in a punchdown block are 'sprung apart' by poor practices, the entire block often must be replaced to restore reliable connections. Marginal practices like these are strongly discouraged in large or mission-critical installations, because they can introduce extremely troublesome intermittent connections, as well as more-obvious outright bad connections. Similarly, stranded wire can be used on punch-down blocks, but they are designed for solid wire connections. If these multiple wires are of different thicknesses (wire gauges), it is even more likely that the thinner wire will develop contact problems. It is also possible to punch down multiple wires on top of each other in a single post of a punch-down block, but this practice is discouraged because of reliability concerns. For example, pushing a screwdriver down the middle of the block is a bad practice as it forces the two blades of the terminal post apart, leading to bad contacts. It is possible to insert wiring without the proper tool, but this requires great care to avoid damaging the connectors. Often a separate tool known as a spudger is used to remove small stray pieces of cut off wiring stuck within punch-down blocks.

#110 PUNCH BLOCK PATCH#

They are sometimes used in other audio applications, such as in reconfigurable patch panels. Punch-down blocks are often used as patch panels, or as breakout boxes for PBX or other similar multi-line telephone systems with 50- pin RJ21 ( Amphenol) connectors. Punch-down blocks are a very quick and easy way to connect wiring, as there is no stripping of insulation and no screws to loosen and tighten. The exact size and shape of the tool blade varies by manufacturer, which can cause problems for those working on existing installations, especially when there is a poorly documented mix of different brands. Some will automatically cut any excess wire off. Details of how wires are pushed into the clips of 66 blockДЄ tool called a punch down tool is used to push the wire down firmly and properly into the slot.

110 punch block