RJ stands for Registered jack, a female-type connector used for system cables, wiring, and manufacturing jacks.
A registered jack’s main purpose is to connect various telecom devices and data tools with services provided by network servers and communication service providers.
Different types of registered jacks are used for different purposes, for example, RJ-45, RJ-11, and RJ-14, etc.
Where RJ-14 is used for connecting two telephone lines or four wired devices, whereas RJ-45 comes with 8 pins for computer network interconnections and exclusive telephone circuits.
RJ-14 is similar to RJ-11 except for the pin configuration because, in RJ-11, only 2 pins are used as conductors.
- RJ14 and RJ45 are both types of connectors used for telecommunications applications.
- RJ14 is a four-wire connector for two-line telephone systems, while RJ45 is an eight-wire connector for Ethernet networking.
- RJ14 connectors are smaller than RJ45 connectors and are incompatible with RJ45 sockets, while RJ45 connectors are larger and can be used in RJ14 sockets with an adapter.
RJ14 vs RJ45
RJ14 or registered jack 14 has a configuration of 6P4C and can be used to establish two telephone connection. RJ45 is large and bulky used in Ethernet networks that has a configuration of 8P8C. It can support 10 GBPS speed over Ethernet networks.
RJ-14 has a 6-position connector where 4 pins are used either for 4 wire devices or two phone line connections. It uses a 6P4C connector type and a 6P2C modulator connector with four conductors. RJ-14 is similar to RJ-11 except for the pin configuration because, in RJ-11, only 2 pins are used as conductors.
RJ-45 is a registered jack used in ethernet or computer networking connections. It comes with 8 position connectors where all 8 pins are placed or used as conductors. It is broader than a telephone jack. Wiring can be done in two different types of termination standards; the first is T568A, and another is T568B.
|Parameters of Comparison
|Pins and positions
|It has 6 positions with 4 pins placed or used as conductors.
|It has 8 positions with 8 pins placed or used as conductors.
|RJ-14 has a 6P4C connector type and a 6P2C modulator jack.
|RJ-45 has an 8P8C connector type that is 8-position, 8-contact.
|Number of wires used
|Four wire connections can be made.
|Eight wires connection can be made.
|Positions of wires
|Pin 2 for negative wiring and pin 5 for positive.
|4 pins moved to the positive wire and 4 pins to the negative wire.
|It is used in two-line communication or for connecting two telecom lines.
|It is used in Ethernet networking and computer network connections.
What is RJ14?
RJ-14 comes with a 6 position connector where 4 pins are used for 4 wire devices or two phone line connections.
It is mainly used for two-line communication. It has a 6P4C connector type and a 6P2C modulator jack.
RJ-14 can also be used when multiple lines are connected to a single connection.
RJ-14 has four wires with a position as pin 2 for negative wire and pin 5 for positive wire. RJ-14 is similar to RJ-11 except for the pin configuration because, in RJ-11, only 2 pins are used as conductors. I
n RJ-14 wiring, all the connectors can be used except 6P2C as it has low important junction points.
RJ-14 is only used for 4 wire devices commonly used in private telecommunication lines circuits in the United States. And are also used in modems that are manufactured in the United States.
What is RJ45?
RJ-45 is a registered jack used in ethernet or computer network connections. It comes with 8 position connectors where all 8 pins are used as conductors.
It is broader than a telephone jack, where 4 pins are for the positive terminal, and 4 are for the negative terminal.
RJ-45 uses an 8P8C which is an 8-position, 8-contact connector type. Its connectors are a little bit bigger than RJ-11 connectors.
Two different types of wiring methods are available in RJ-45. One is TB68A other is TB68B. It connects 8 wires at a time, primarily used in ethernet cables.
RJ-45 connects different types of devices related to computer networking, for example, switch, hub and PC, etc., to each other. And it is used in more considerable connections because it has 8 wire connection facilities.
Main Differences Between RJ14 and RJ45
- RJ-14 comes with 6 position connector, and RJ-45 comes with 8 position connector.
- In RJ-45, all 8 pins are used as conductors for 8 wire connections, but in RJ-14, only 4 are used for 4 wire connections.
- RJ-14 has a 6P4C connector type and a 6P2C modulator jack. And RJ-45 has 8P8C, which is 8 position, 8-contact connector type.
- RJ-45 is mainly used for ethernet or computer networking connections, and RJ-14 is used for two-line-based communications. Still, it can also be used when multiple connections are connected to a single endpoint connection.
- In RJ-14, the positions of wires are like pin 2 for negative wiring and pin 5 for positive. While in RJ-45, 4 wires each for the negative and positive terminals are used.
Last Updated : 13 July, 2023
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Sandeep Bhandari holds a Bachelor of Engineering in Computers from Thapar University (2006). He has 20 years of experience in the technology field. He has a keen interest in various technical fields, including database systems, computer networks, and programming. You can read more about him on his bio page.