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What is the difference between RJ45 and RJ48 ?

What is the difference between RJ45 and RJ48 ?


RJ48 and RJ45 use 8P8C modular plug and 2 pairs of wires for sending and receiving data, one-to-one.

RJ45, we are already very familiar with using pins 1, 2, 3, and 6 to receive and send data.

As with RJ48, there are several configurations available depending on the situation and how they are used.

One configuration uses pins 1, 2, 4, and 5 of the other 1, 2, 7, and 8.

Other wires are also used for extra shielding, while the rest of the wires are reserved in some cases that will appear in the future.

RJ45 is primarily used for local area networks where the distance between each network element is relatively short.

This is very common in many offices and homes, mainly because it has become very popular.

RJ48 is used in other applications, most commonly in T1 data lines, the lines can extend longer distances and are often exposed to the environment.

To protect signal integrity, RJ48 wiring uses shielded or shielded twisted pair cables.

RJ45 uses the more common twisted pair and unshielded twisted pair, there are 1 to 6 categories, with super five is the most important use.

Whether you want to use RJ45 or RJ48 depends on the hardware


The difference between RJ45 and RJ48


1. RJ45 and RJ48 use the same connector

2. RJ45 is different from their wiring method RJ48

3. While RJ45 is mainly used in local area networks, it is more common for RJ48 T1 lines to appear

4. Use UTP cable RJ48 STP for RJ45 connection


RJ48 interface cable connector


For connecting T1, E1 serial lines usually use shielded twisted pair, RJ-48 can also support PIN3, PIN6 for ground connection.

The line sequence of RJ45 and RJ48 is the same, they are 87654321 from left to right, but the signal definitions are different

RJ45: Usually 1/2/3/6 pins are used for 10/100M. All 8 pins are used for 1000M/10G. That is, the network cable interface on our usual computer, router, etc.

RJ48 : RJ-48C and RJ-48S are commonly used, the pins used are (1-2) (4-5), and occasionally some (3-6) are connected to SHIELD/GND/RETURN


RJ45 interface interface cable connector


RJ45 is a kind of information socket (ie communication terminal) connector in the wiring system. The connector consists of a plug (connector, crystal head) and a socket (module). The plug has 8 grooves and 8 contacts.


What is the difference between RJ48 interface and RJ45 interface


Common ones are Ethernet transceivers/E1 transceivers, etc. I don’t know which one is used. Under normal circumstances, Ethernet 10/100/1000MUTP/STP interfaces are often used for Category 5 unshielded double-interchange cables, which is what we usually say Network cable, Yin Zhong with crystal head.

RJ45 will be used, and we call it RJ48 for the e1 interface. RJ45 and RJ-48 connectors are very similar, but the regular RJ48 interface has a small protrusion on the outer wall of the eighth line side to distinguish it from RJ45 (but there are currently two common devices. The appearance of the interface is the same), and the Ethernet and e1 interfaces have different definitions in terms of pin definition, impedance and other indicators.


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Our RJ12, RJ45, RJ48 waterproof connector are used in a lot of applications, you can see more from our website :


RJ12 waterproof connector

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RJ12 sealed connector

RJ12 IP67 waterproof connector

RJ45 waterproof connector

RJ45 watertight connector

RJ45 sealed connector

RJ45 IP67 waterproof connector

RJ48 waterproof connector

RJ48 watertight connector

RJ48 sealed connector

RJ48 IP67 waterproof connector



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