Monday, June 6, 2011

computer networking

RJ45 Crimped
RJ45 Crimped

RJ-45 connectors

RJ45 is a type of registered jack. The registered jack specifies the physical male and female connectors as well as the pin assignments. RJ45 features 8 pins and is the standard connector for Ethernet based networks. We can also find it on ISDN, and T1 connections. Ethernet is the standard media for the VOIP phones so we can find it used with modern digital phone systems. The RJ11 male connector, (standard telephone connector), fits perfectly into an RJ45 female connector being a little narrower, which is why many companies have deployed data networks only. The middle pair only is used for the telephone connection. There are different RJ45 male connectors for various cables.
 The male RJ45 are very cheap but they are prone to various problems.
Shielded RJ45
Shielded RJ45
The locking tab is prone to breaking. Here are some tricks to avoid this: buy the connectors with the locking tab curved down so it avoids the snagging. If you can’t find the cleverly designed connectors use boots to avoid snapping the tabs.
Snagless RJ45
Snagless RJ45
Snagless RJ45
Snagless RJ45
Snagless RJ45
Snagless RJ45
Snagless Shielded RJ45 Male
Snagless RJ45 Sheilded
There are RJ45 specially designed for solid cable, for stranded cable, for STP cable.
Rj45 Male CompareRj45 Male CompareUse only the appropriate connector for the cable you install. Using an RJ45 for solid wire with stranded wires, or the other way around, will cause poor contacts, h