There are currently several common variants of the Registered Jack (RJ), which are generally distinguished by specific numbers following 'RJ'. These numbers correspond to the wire sequence and the number of wires within the connector. As the number of wires varies, so does their size.
RJ11 Connector(RJ11 jack)
The RJ11 falls into the 4P4C category of modular connectors; there is also a 6P4C specification.Its primary function is to transmit audio and control signals, connecting telephones to the Public Switched Telephone Network (PSTN), and it is also used for Asymmetric Digital Subscriber Line (ADSL) and modem connections
The four wires are arranged in two pairs, allowing connection to two telephone lines: one pair for normal operation and one pair as a backup
RJ12 Connector(RJ12 jack)
The RJ12 is a 6P6C connector, with six pins and six wires; the only difference between it and the RJ11 is that it has two additional wires,the RJ12 is the same size as the 6P4C RJ11.
The RJ12 connector establishes three connections via three pairs of wires. It is primarily used in system telephones and can also be used as a replacement for RJ11 connectors; however, RJ11 connectors cannot be used as a substitute for RJ12 connectors.
RJ45 Connector(RJ45 jack)
The RJ45 is a well-known connector widely used for Ethernet and data connections. As such, they are also known as Ethernet connectors. It is an 8P8C connector. Due to the higher number of pins, the RJ45 is slightly larger than the RJ12. The RJ45 is used to terminate coaxial cables that comply with the Cat6 and Cat5e standards.
Top comments (0)