Why use RJ45 as network cable port

Mon Apr 17 21:20:09 CST 2023

0_Why-use-RJ45-as-network-cable-interface

Why use RJ45 instead of USB as network cable interface

Compared to USB, RJ45 has an extra snap. You should hear a 'click' sound when you plug in the network cable.

After the network cable is plugged in, in the role of the snap, it is impossible to pull the cable out directly, you have to pinch the snap to do so.

Imagine, when you tug dozens of network cables together, the USB interface of the do not know how many will come off. Then, you have to go inside to search one by one.

Theoretically, the server room should look like this:

1_Neat-wiring

But in reality more server rooms look like this:

2_Cluttered-wiring

These ethernet cables going out of the server room may be tens of meters before they are connected to a network panel at the workplace, or to a small router in some office, or to some WIFI access device. It is impossible to imagine how a USB interface cable could meet such usage scenarios.

3_RJ45-8P8C-Hornmic

RJ45 is an engineering connector type

1. Operability.

A special pliers, a new head, a heel wire, no electricity, spend a second pinch in the engineering site, you can press a good joint to. usb Do you want to weld one by one in the field?

4_Making-network-cables

2. Reliability.

The back of the shrapnel, the duck tongue inside the pressure line. Can ensure that after inserting a relatively high mechanical strength, will not be pulled down because of vibration and the weight of the wire and other reasons.

The USB port does not fit this scenario.

3. Transmission distance.

The effective transmission distance of the network cable is 100 meters! Reduce the network speed requirements, can be relaxed to 200 meters. USB is not a rival at this point.

4. Compatibility.

RJ45 was born in 1990, more than thirty years ago ah! So far the physical interface has not changed. Unlike the consumer sector, many engineering fields are to be used until the end of the life of the device. And USB interface switches from Type-A to Type-B and Type-C variety.

5. Speed.

The transmission speed of the ethernet cable: 10M in 1990; 100M in 1995; 1G in 2001; 10G in 2008.

5_Ethernet-speed-Cat8

To sum up: RJ45 is very good, the life force is absolutely tenacious

1, It is one of the foundations of the Internet, the earliest is still only 10M, now are upgraded gigabit 10,000 megabit, good speed compatibility.

2, The same period of communication port almost eliminated almost, it is still very strong. For example, parallel port, serial port and so on.

3, RJ45 production is simple, in addition to RJ11, no more than they are easy to produce.

4, RJ45 has a special test tool (including simple and very professional), work with indicators. Detection and maintenance is very good.

5, Integrated wiring inside the RJ45 port can be plugged directly into the RJ11, that is, you can use as a telephone line, telephone without separate wiring.

6, It can also be expanded POE network power supply.

7, Ethernet is a bus structure, any one node is bad does not affect the entire network.

The fact that something is so resilient can only mean that it has its own unique ability.

6_Making-network-cables

Limitations of USB:

1, It is almost impossible to make on site (RJ45 is available as you go).

2, The distance is not available (RJ45 can be 100 meters or even farther).

3, Adapter equipment less, can no longer be extended (many RJ45 to fiber optic equipments).

4, Almost no test equipment (RJ45 detection means a lot).

5, USB connected devices require additional drivers. rj45 as long as the network card driver is good, the communication portrait follows the common communication protocol.

6, USB is the host-device mode, non-peer-to-peer structure, the host is down, the device can not communicate with each other.

7_USB-cable-HornmicLink



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By HornmicLink_Henry @230417 21:52