The Detail For RJ45 Interface Connector


In this network era, the connector has been becoming more and more popular in our life. All kinds of copper wires and fiber optic cables are likely to require corresponding connectors such as RJ45 connectors/plugs and fiber connectors. Here, we focus on the connector for RJ45 Interface involved with RJ45 Ethernet cable.

What Is RJ45 Interface Connector?

Commonly known as “crystal head” given its appearance, RJ45 interface connector is a kind of component that can insert along a fixed direction into a RJ45 interface and can prevent loss of plastic connectors automatically. RJ45 is a kind of network interface specification (similar to RJ11 interface, commonly used as “telephone interface” to connect telephone lines). Crystal head is suitable for the equipment or horizontal subsystem field termination, shell material with high density polyethylene. Both ends of the twisted pair must be installed RJ45 plug to plug the RJ45 connector on the RJ45 interface card (NIC), the hub or switch on RJ45 interface, for network communication. Each of the twisted pair at both ends by installing crystal head with NIC connected to a hub (or switch). RJ45 interface is typically used for data transmission, the most common application interfaces for the network card.

RJ45 Interface Connector

Line Sequence for Network Cable Cords

The RJ45 network cord, made up of a total of eight core, is widely used in LAN and ADSL broadband Internet between network devices for network cable connection. It is often inserted into a RJ45 interface connector to form a RJ45 Ethernet cable.

There are two connection orders  (line sequence) for the eight cores. Normally, the two line sequence were referred to as T568A line order and T568B wire order in the specific application. One order for T568A is white green, green, white orange, blue, white blue, orange, white brown, brown; the other is white orange, orange, white green, blue, white blue, green, white brown, brown.


RJ45 Interface Connector Types

Common RJ45 connector can be divided into two categories: DTE type used in Ethernet card, router, etc., and the DCE type used in switches, etc. DTE is called “data terminal equipment”, DCE is known as “data communications equipment”. In a sense, DTE device known as the “active communication equipment”, DCE devices referred to as “passive communication equipment”. When two types of devices using RJ45 interface connection communication, one must use a crossover cable connection.


In network products, network cable and RJ45 connector may be ordinary but necessary. Although Internet cable and crystal head is not important things, but if the quality of cable with crystal head is not good, then you will often meet all kinds of puzzling problem when surfing the Internet for transmission and the exchange of important data. So the choice and buying of cables and crystal head is important as well. By the way, FS.COM offers RJ45 Plugs with high quality and have superior performance in your networking system.

Related Articles:
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Difference of Straight Through and Crossover Cable
Patch Cable vs. Crossover Cable: What Is the Difference?
Quick View of Ethernet Cables Cat5, Cat5e And Cat6

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