CAT3 cable head RJ (registered jack) connector is a standardized telecommunications network inter-connection, for providing voice and data transmission. The Bell System Universal Service Ordering Code (USOC) system defined the connector first time, and in the 1970s it was to provide computer-aided telephone equipment licensed by the Federal Communications Commission (FCC). They were subsequently incorporated into Chapter 47 of Part 68 of the Code of Federal Regulations.

The connector is a plastic connector that inserting in a fixed direction and it automatically prevents falling off. People commonly know it as the “crystal head”. The technical term is RJ-11 connector (RJ-11 is a kind of network interface protocol), like the RJ-45 interface, the “telephone interface” we normally use to connect telephone lines. People call it “crystal head” because of its translucent appearance looks like crystal. Connector is used for connection between equipment or horizontal sub-system.The housing material is made of high density polyethylene. By connector, each two ends of twisted pair cable can connect the data card and hub(or switch).

CAT3 cable head UTP RJ11 connector is applicable for voice telecommunication cable especially.

• 6P4C;
• PC material;
• 3μm gold plated on the contact pins;
• Fixed cable tail can prevent the conductor from loosening frequiently.