What do you know about RJ45 connectors?

How many RJ45 interface types do you know? So how much do you know about the type of RJ45 interface? Let me introduce you about the type of RJ45 interface, so that you can have a more in-depth understanding of the RJ45 connector, let's have a look at it together! RJ11 and RJ14, RJ25 for the same series, the same size, are 9.5 mm wide, but the number of contacts are different. RJ11 has only one middle pair of contacts, which can be connected to one pair of wires, representing 6P2C (six position, two conductor) ; RJ14 uses the middle four contacts, which can be connected to two pairs of wires, representing 6P4C; RJ5 uses all six contacts, which can be used to connect two pairs of wires, representing 6P4C, three pairs of lines can be connected, representing 6P6C.

Sometimes this connector can also be used to provide low-voltage low-power power supply (AC or DC) , commonly used PIN2 and PIN5(black and yellow lines) . RJ11 is generally used as the generic name for the 9.5 mm series, and RJ11-6p2c, RJ11-6P4C, and RJ11-6p6c are used to distinguish the number of contacts. The phone also uses a connector for connecting the phone to the handle, called 4P4C (also known as RJ22 and in a series with RJ9 and RJ10) , which has four contacts and is 7.5 mm wide and smaller than RJ11 feet. There is also an 8P8C connector called RJ61 for connecting twisted pair. Because of this sequence of twisted-pair in the third and fourth in the two-wire distance, will cause greater crosstalk, not suitable for Ethernet transmission of high-frequency signal. There is also an RJ48 connector, also 8P8C, which can be used to connect 4 pairs of T1 data links, each pair of lines can transmit TDM 23 sessions. Most of the RJ connectors are RJ45 connectors for Ethernet connections, and the 8P8C can connect four pairs of twisted-pair wires, which are 12mm wide and a bit wider than the RJ11 series. The RJ45 connector is sometimes used for telephone or RS232 connections, or for VGA video signals. The universal telephone connector is a kind of RJ11, which was originally the common name of a plug-in developed by a company in the United States. It was originally named WEXW, and the shape of the connector is six pins. WE6W uses all six contacts, wE2W, on the other hand, used only two pins in the middle and later became one of the RJ series connectors. RJ45 connectors are common in our lives. Have you noticed? The cables, routers, and switches that our computers use to connect to the network are all connected through RJ45 connectors.