Knowledge of RJ45 connectors

RJ45 connector is a kind of connector for information socket (i.e. communication outlet) in wiring system. The connector is composed of plug (connector, crystal head) and socket (module).RJ stands for Registered Jack, which means "Registered socket".In the FCC (federal communications commission standards and regulations), the RJ is the interface that describes the public telecommunications network, and the RJ45 connector of the computer network is the common name for the standard 8-bit modular interface.

The RJ45 connector is composed of a plug and a socket. The connectors of the two components are connected to the wires to achieve electrical continuity of the wires.The core of RJ45 connector module is modular jack.The gold-plated wire or socket hole maintains a stable and reliable electrical connection to the modular socket shrapnel.Due to the friction between the shrapnel and the socket, the electrical contact is further strengthened with the insertion of the plug.

The RJ45 connector body is designed with an integral locking mechanism, so that when a modular plug is inserted, the maximum pull-out strength can be generated outside the interface between the plug and the socket.The wiring module on the RJ45 connector module is connected to the twisted pair through a "U" shaped wiring slot. The locking shrapnel can fix the RJ45 connector module on the information outlet device such as the panel.

The RJ45 consists of a plug and a socket, and the connectors of the two components are connected to the wires to achieve electrical continuity of the wires.

The core of RJ45 module is modular jack.The gold-plated wire or socket hole maintains a stable and reliable electrical connection to the modular socket shrapnel.Due to the friction between the shrapnel and the socket, the electrical contact is further strengthened with the insertion of the plug.The main design of the jack adopts the overall locking mechanism, so that when the modular plug is inserted, the interface between the plug and the jack can produce the maximum drawing strength.The wiring module on the RJ45 module is connected to the twisted pair through a "U" shaped wiring slot, and the locking shrapnel can fix the RJ45 module on the information outlet device such as the panel.

RJ45 Modular Plug, as RJ45 Modular Plug, is designed for data cable terminal, Modular connection and alteration.The RJ45 crystal head is required to have good conducting performance.The contact trident ** has a gold plated thickness of 50 m, meets the ultra 5 class transmission standard and conforms to the T568A and T568B line sequence;It has the functions of preventing looseness, plugging and self-locking.The RJ45 plug is the standard connector in the copper cable wiring, it and the socket (RJ45 module) together constitute a complete connector unit.The connectors of the two components are connected to the conductors to achieve electrical continuity of the conductors.It is also an integral part of the integrated wiring technology finished jumper, the RJ45 crystal head is usually attached to both ends of a pair of twisted cables.In a standard cabling design installation, this accessory is usually not listed separately, which means that the user is not encouraged to connect the twisted pair to the RJ45 plug.

Performance indicators of RJ45 also include attenuation, near-end crosstalk, insertion loss, return loss, and far-end crosstalk, etc.RJ45 technical specifications: the performance of contact resistance is 2.5 m Ω, insulation resistance for 1000 m Ω, electric strength for DC1000V (AC700V), a minute without breakdown and flashover phenomenon, * * surface gold or silver card, can wire diameter from 0.4 mm to 0.6 mm, plug socket repeatable plug number not less than 750 times, 8 line contact needle gold-plated 509 (inch).

Among these performance requirements, crosstalk is an important factor to be considered in the design. In order to make the whole link have better transmission performance, crosstalk cancellation technology is often used in the socket. Crosstalk cancellation technology can produce crosstalk signals with the same size and opposite polarity as the interference introduced from the plug to offset crosstalk.If the crosstalk introduced by the modular plug is represented by "++++", the opposite crosstalk generated by the socket is represented by "--".When the size of two crosstalk signals is equal and the polarity is opposite, the total size of the coupling crosstalk interference signal is zero.