April 10, 2023
In our home LAN, transmission medium is usually 100m network cable, and another commonly used network cable is gigabit. What is difference between them? What is difference between a 100m network cable and a Gigabit network cable? Today we will summarize contents of cable connection method in this issue.
According to classification of network cables, all network cables have a type marking on outer sheath. CAT5 and CAT5E represent category 5 and 5 cables respectively, which we call 100m network cables; CAT6 and CAT6A represent category 6 cables. , Cat6e cable and cable are gigabit network cables. Actually, Gigabit can also use Cat5e cable, but we recommend using Cat6 cable, because line performance is different, Gigabit use Cat5e cable is not very safe.
Here are some common examples:
1. What cable do you use to connect backbone Gigabit switch to secondary Gigabit switch? Category 6 (CAT6)
2. What cable is used to connect a Gigabit backbone switch to a 100M secondary switch? Category 6 (CAT6)
3. What cable are you using to connect Gigabit backbone switch to new server? Category 6 (CAT6)
4. What cable is used to connect Gigabit backbone switch to old server? Cat5e (CAT5E), speed 100 Mbps.
5. Gigabit spur switch, what cable is used to connect new machine? If you have a big budget, use Category 6 (CAT6) or at least Category 5 (CAT5E).
6. What cable are you using to connect old machine to 100Mbps switch? If you are using CAT5E, you can leave it intact. If quality is too bad, you can cut it off and make a new fabric that is superior to CAT5E.
In terms of data transmission methods, a 100m network cable has 8 cores, but only 4 of them are used for upload and download, while a gigabit network cable must fully use 8 cores.
As shown in figure below, each network port has two green LEDs on left and right. The left LED lights up at 100M and right LED lights up at 10M. Both LEDs indicate that a 1000M device is connected. Of course, switch, network cable and devices connected to switch support 1000M, and these 1000M will only glow.
In addition, wire strand arrangement has a cross-shaped plastic frame in middle of gigabit network cable strands, which is used to separate four groups of 8-wire wires. network cable method increased difficulty.
Then question is:
A few friends have been asking if I can use a gigabit switch to connect to a 100m network cable?
A gigabit switch can be connected to a 100m network cable, but this line can only use a 100m network and cannot reach gigabit level.
Both gigabit and 100-megabit network cables use T586B standard. (Unless crossover wires are required between devices.)
If you want to connect to a gigabit switch to achieve gigabit speed, category 6 cable is best, and category 5 cable is not acceptable. The quality of Super Category 5 cable depends on quality of cable. cable and transmission distance.
Can a 100-megapixel network cable die and a gigabit network cable die be made in same way? Yes, method is exactly same. The specific production method is detailed in a previous article.
However, when testing a gigabit network cable, you need to make sure that all lines 1-8 are passable, since all strands 1-8 of a gigabit network cable are working.
Here we need to present performance of six line types:
Category 6: The transmission frequency of this type of cable is between 1 and 250 MHz, and Total Attenuation and Crosstalk Ratio (PS-ACR) of a Category 6 cable system at 200 MHz should be high. headroom. Provides twice throughput of Category 5e. Category 6 wiring performance is much higher than Category 5e standard and is most suitable for applications with transmission rates above 1Gbps. An important difference between category 6 and category 5e is that it improves performance in terms of crosstalk and return loss. For new generation of full duplex high speed network applications, excellent return loss performance is extremely important. The basic connection model is canceled in six types of standards, and wiring standard uses star topology. Wiring distance required: permanent connection length cannot exceed 90m, and channel length cannot exceed 100m.
If hardware is confirmed to be working properly. Try setting one or two gigabit ports to 100M full duplex and/or half duplex, which will be more stable.