RJ11 and RJ45 refer to the 4-core crystal head and the eight-core crystal head. Our usual network cables are RJ45, which is the eight-core crystal head, and Cat5 Cat5e represents the five types of lines of five types, which is 100M network cable. Cat6 Cat6a represents the six types of lines and super six lines are also Gigabit network cables. In fact, Gigabit can also use super five lines, but we recommend it to use 6 cables because the line’s strengths are different. It is not very insurance with a super 5 cable. In use, Gigabit network line is fully compatible with 100M network. The transmission rate of the 100M network cable does not have a high high, so it cannot be compatible up. That is to say, in the home network environment, it is feasible to use the 100M network cable and Gigabit network cable. With Gigabit network cable, you don’t have to worry about the trouble of rewiring the reorganization of the home broadband upgrade, but the price of the Gigabit network cable is also A lot more expensive.

In the transmission data method, the core of the 100M network cable is 8 cores, but uploaded and downloaded only four of them, and Gigabit network lines need to be completely used. Our common crystal heads have RJ45 and RJ11, their structure and application ranges, can not be mixed, today we come to find out the connection and difference between the two crystal heads. RJ letters indicate registered jacks, is a standardized network interface. RJ45 Crystal Head We usually say that the network crystal head refers to the RJ45 crystal head, which is a joint with 8 pin, mainly used in Ethernet, “rj” means registered jack, “45″ representative The serial number of the interface standard.

RJ45 crystal heads are typically on Ethernet lines to connect various network devices such as computers, routers, switches, and the like. The four-core crystal head for the RJ11 crystal headphone line is RJ11 crystal head, which is similar to the RJ45 crystal head, but only 4 needles, it is a joint developed by the western electronic company, often used to connect the phone and modem . It should be noted that RJ11 generally refers to a modular jack or plug in 6 positions (6-pin), but only 4 needles are used, and the RJ11 is also used for 4-pin version of the modular connector.

The difference between the RJ45 crystal head and the RJ11 crystal head is a joint having 8 additions and 8 contacts (8P8c), while the RJ11 crystal head typically has only six grooves and 4 contacts (6P4C), so The volume of the RJ45 crystal head is larger than the RJ11 crystal head. RJ11 Crystal Head can usually be inserted into the RJ45 interface, but it will not be, but it is highly recommended not to use the RJ11 crystal head for the RJ45 interface. The line sequence standard is different due to the configuration of the RJ45 crystal head and the RJ11 crystal head, and the line sequence standard at the time of wiring is also different. The RJ11 crystal head typically has only six grooves and 4 contacts (6P4C), and its line sequence is fixed.

There are two line sequence standards: T-568A and T-568B when the RJ45 crystal head wiring is wired. By adopting different standards, the finally produced network cable has two types and cross-type. Now all the network cable is made of 568b. The line is as follows: Application Field RJ45 crystal head is typically terminated at both ends of the network cable, used to connect network devices such as the computer, while RJ11 crystal head is terminated in ADSL, voice cable two End, used to connect the phone or modem. R
The J45 Crystal Head and RJ11 Crystal Head are different from the size, wiring criteria and applications. The two do not have interoperability and should pay special attention when used.