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Anonymous users2024-02-07Twisted pair is a general term, and Category 5 wire is only one of the specifications of twisted pair.
Twisted pairs, in terms of whether they are shielded or not, can be divided into unshielded twisted pair and shielded twisted pair, and unshielded twisted pair is generally used on occasions.
In terms of the performance of twisted pairs, they are divided into categories, and so on. In the case of 100Mbps rate, Category 5 and Category 5 twisted pair cables are commonly used, and Category 6 is generally used for 1000Mbps rate.
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Anonymous users2024-02-06Category 5 cable refers to twisted pair cable with a transmission speed of about 100Mbps.
Now it's common to use Category 5 at 100 1000.
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Anonymous users2024-02-05Twisted pairs are divided into shielded twisted pair and unshielded twisted pair.
1. Shielded twisted pair.
It is a copper twisted pair that is widely used for data transmission. In terms of physical structure, the shielded twisted pair has more full shielding and or wire-to-pair shielding than the unshielded twisted pair, which reduces attenuation and noise through shielding, thereby providing a cleaner electronic signal and longer cable length, but the shielded twisted pair is more expensive, heavier and not easy to install.
2. Unshielded twisted pair.
It is a kind of data transmission line, which is composed of four pairs of transmission lines of different colors, which is widely used in Ethernet and ** cables. The unshielded twisted pair cable has an unshielded jacket with a small diameter, which saves the space occupied and has a low cost; Light weight, easy to bend, easy to install; Flame retardant; It has the advantages of independence and flexibility. In the integrated wiring system, unshielded twisted pair is widely used.
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Anonymous users2024-02-04This is the answer on my school's computer networking book.
The main characteristics and applications of various types of twisted pairs.
Type: Class 1, Class 2, Class 3, Class 4, Class 5, Super Class 5, Class 6.
Transmission rate bps: 20k, 1m, 10m, 20m, 100m, 155m, 200m
Transmission signal types: analog signal, analog signal and 1m digital signal, analog signal and digital signal, analog signal and digital signal, analog signal and high-speed digital signal, analog signal and high-speed digital signal, analog signal and high-speed digital signal.
Applications: Lines, General Communication Lines, Ethernet & Token Ring, Token Ring, High Speed Ethernet, ATM, FDDI, High Speed Ethernet, ATM, High Speed Ethernet, ATM.
That's it. The type of transfer rate and application order are corresponding.
Structurally, it is divided into: shielded twisted pair and unshielded twisted pair.
It is divided into 5 categories in terms of use: cat1, cat2, cat3, cat4, and cat5
In the past, CAT3 and CAT4 were mostly used for 10M network formation, while CAT5 was mostly used for 100M networks. Now cat5 (Cat5 line) is mostly used.
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Anonymous users2024-02-031) Class 1 line (cat1):
The maximum frequency bandwidth of the cable is 750kHz, which is used for alarm systems, or only for voice transmission (a class of standards is mainly used for ** cables before the early eighties) and is not used for data transmission.
2) Class 2 line (cat2):
The maximum frequency bandwidth of the cable is 1MHz and is used for voice transmission and data transmission at a maximum transmission rate of 4Mbps, which is common in older token networks that use the 4Mbps specification token passing protocol.
3) Category 3 line (cat3):
Refers to the cable specified in the ANSI and EIA TIA568 standards, the cable has a transmission frequency of 16MHz, a maximum transmission rate of 10Mbps (10Mbits), mainly used in voice, 10Mbit S Ethernet (10Base-T) and 4Mbit S Token Ring, the maximum network segment length is 100M, and the connector in the form of RJ has been faded out of the market.
4) Category 4 line (cat4):
This type of cable has a transmission frequency of 20MHz and is used for voice transmission and data transmission at a maximum transmission rate of 16Mbps (referring to the 16Mbit S Token Ring), mainly for token-based LANs and 10BASE-T 100BASE-T. The maximum network segment length is 100 m, and the connector in the form of RJ is not widely used.
5) Cat5 line (cat5):
This kind of cable increases the winding density, the jacket is a high-quality insulating material, the highest frequency bandwidth of the cable is 100MHz, the maximum transmission rate is 100Mbps, for voice transmission and the maximum transmission rate of 100Mbps data transmission, mainly used for 100BASE-T and 1000BASE-T networks, the maximum network segment length is 100M, and the connector in the form of RJ.
6) Cat5e line:
Category 5 has reduced attenuation, less crosstalk, and has a higher attenuation-to-crosstalk ratio (ACR) and signal-to-noise ratio (SNR), and a smaller time delay difference, and the performance has been greatly improved. Category 5 cables are mainly used for Gigabit Ethernet (1000Mbps).
7) Category 6 line (cat6):
The transmission frequency of this type of cable is 1MHz 250MHz, and the Category 6 cabling system should have a large margin for the Combined Attenuation Crosstalk Ratio (PS-ACR) at 200MHz, which provides 2 times the bandwidth of Category 5e. The transmission performance of Category 6 cabling is much higher than that of Category 5e standards, and it is most suitable for applications with transmission rates higher than 1Gbps.
8) Super Class 6A or 6A (Cat6A):
The transmission bandwidth of this type of product is between Category 6 and Category 7, the transmission frequency is 500MHz, the transmission speed is 10Gbps, and the standard outer diameter is 6mm. Like the seven types of products, the country has not yet issued a formal testing standard, but there are such products in the industry, and each manufacturer announces a test value.
9) Category 7 line (cat7):
The transmission frequency is 600MHz, the transmission speed is 10Gbps, the standard outer diameter of a single wire is 8mm, and the standard outer diameter of a multi-core wire is 6mm.
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Anonymous users2024-02-02The difference between Category 5 lines and Category 6 lines:
Category 5 network cable can undertake the transmission task of 100 Gigabit network speed, Category 6 network cable can transmit Gigabit network speed in addition to 100 Gigabit network speed, and Category 5 network cable can only reach the transmission speed of 100 Gigabit network speed when using gigabit optical fiber.
If the six types of network cable only open a hundred megabit of optical fiber, can also produce a hundred megabit network speed transmission effect, six types of network cable crosstalk and return loss performance has been greatly improved, twisted pair more than an insulated cross skeleton, there is a five types of network cable in the outer skin of the sign is cat5, six types of network cable sign is cat6.
First, the performance aspect.
The transmission performance of Category 6 network cable is higher than that of Category 5. The transmission bandwidth of the Category 5 network cable is 100MHz, while the Category 6 network cable can be used for 100MHz and can transmit gigabit network speeds. In addition, the transmission performance of the Category 6 cable is also more stable than that of the Category 5 cable, because the Category 6 cable is optimized in terms of cable crosstalk and echo loss.
2. Structure and shape.
Structurally speaking, the twisted pair in the 6 types of network cables has more cross skeletons, and the cable can be installed in the skeleton to play a good insulation effect. Secondly, the size of the copper core of the two is different, the copper core of Class 5 is below, and the copper core of Class 6 is in between: in terms of appearance, the outer diameter of the Category 5 network cable is thinner than that of the Category 6 network cable.
Three**. In terms of sales, because the Category 6 network cable has advantages over the Category 5 network cable in terms of material use and performance, it will be higher than the Category 5 network cable.
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