Introduction of the RJ45 interface

RJ45 interface typically used for data transmission, the most common applications for network interface cards. RJ45 various different one type of connector, RJ45 head a different sort of law based on the line, there are two, one is orange and white, orange, green and white, blue, blue, green, brown and white, brown; another green, white, green, orange and white, blue, blue, orange, brown, white, brown.

There are two RJ45 connector line: straight line, cross-line.

RJ45 network interface cards

10/100 Base TX RJ45 interface Ethernet interface, to support 10 trillion and 100 trillion adaptive network connection speed, common RJ45 connector into two categories: for Ethernet network cards, routers, Ethernet interface DTE type, there are used to switch the DCE type. DTE can be called the “data terminal equipment”, the DCE can be called the “data communication device. In one sense, the DTE device called “active communication equipment, the DCE device called” passive communication equipment. When two devices with the same type of connection using the RJ45 interface communication, you must use a crossover cable to connect

RJ45 cable plug

RJ45 cable plug, also known as crystal head, a total of eight core made of cable (called five lines or twisted pair) connection between network devices are widely used in LAN and ADSL broadband Internet users. RJ45 type plug and cable specific application, there are two connection methods (linear order) are called T568A line sequence and T568B wire order.

RJ representatives of the name registered jack (Registered Jack), is derived from the Bell System USOC (Universal Service Ordering Codes, universal service classification code) code. The USOC the registered jack wiring, developed by the Bell System for the user’s device is connected to a public network. FCC requires application controls this purpose. FCC (Federal Communications Commission) on behalf of the U.S. government released a document specifies the RJ11.
RJ11 connector for Electronics West (Western ElectricCo) developed the generic name. Its shape is defined as a 6-pin connection devices. The formerly known WExW, where x represents the ‘active’ contacts or wire needle. For example, WE6W all six contacts, numbered 1 to 6, WE4W the interface using only 4-pin outermost two contacts (1 and 6) do not, WE2W use only the middle two pins. RJ11, information sources are contradictory, it can be 2 or 4-core and 6-pin connector. More confusion, RJ11 and not only is used to represent the 6-pin connector, it also refers to the 4-pin version.
Difference between RJ45 and RJ11
Different standards, different sizes
Due to the different size of the two (RJ11 4 or 6-pin, RJ45 8-pin connector device), apparently can not be inserted into the RJ11 jack RJ45 plug. The reverse is physically feasible (RJ11 plug RJ45 jacks), which people mistakenly think that the two should be able to work together. In fact not the case. Strongly not recommended for RJ45 jack RJ11 plug.
RJ11 is not internationally standardized, its size, the insertion force, insertion angle no uniform connector design requirements in accordance with international standards, and therefore can not ensure interoperability. They even cause the destruction of both. Due to the RJ11 plug RJ45 jacks, plugs on both sides of the plastic part will damage the metal pin inserted into the jack.