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This article will introduce the differences between DSL, Ethernet and Fiber .
1. What is a DSL cable?
DSL is a broadband access technology using telephone line as the transmission medium. DSL has many modes, including HDSL, SDSL, VDSL, ADSL, and RADSL, collectively known as xDSL.
where HDSL and SDSL are symmetrically transmitted , that is, upload speed is the same as download speed, VDSL, ADSL, and RADSL are asymmetrically transmitted , that is, the upload speed is inconsistent with the download speed.
DSL Cable is also called Telephone Cable , it has two cores, four cores, six cores and eight cores, and usually four cores are used. The two cores are analog electronic signals, and the four cores are digital telephone signals. For home use, a two-core telephone cable is usually used. If it is used by a company or enterprise, a four-core telephone cable is generally used. If you are using a digital phone, you usually use a six-core phone cable.
Phone cable is usually made of copper.
DSL cable
2. What is an Ethernet cable?
Ethernet cable is also called network cable . A network cable is usually composed of four pairs of copper core twisted pair wires, using an RJ45 connector.
network cables are generally divided into STP and UTP, among which UTP network cables are the most frequently used.
Currently, Ethernet cables are divided into
- CAT5E (super five categories)
- CAT6 (six categories)
- CAT6 (super six categories)
- CAT6A (super six categories)
- CAT7 (seven categories)
- CAT8 (eight categories)
Maximum transmission rate is 40 Gbit/s, and the maximum transmission distance is 100 m. The following table lists the differences between network cables.
Ethernet cable
3. What is optical fiber?
optical fiber is made of glass fiber , and uses the principle of total reflection of light to transmit data.
optical fiber is divided into multimode fiber and single-mode fiber . Multimode fiber uses 850 nm or 1310 nm wavelength for short distance transmission, and single-mode fiber uses 1550 nm wavelength for long distance transmission.
Generally speaking, optical fiber has the following advantages:
1, large bandwidth and large capacity
Compared with traditional copper cables and cables, optical fiber transmission bandwidth is larger , optical fiber transmission principle improves the transmission capacity of cables through various complex technologies.
2. Low loss, long relay distance
The loss of quartz fiber is lower than that of other transmission media currently used, which also means that the fiber transmission system spans more relay distances.
3, strong anti-interference ability
quartz is the raw material of optical fiber, it is a insulating material , has insulation properties, is not easy to corrode, and is not affected by electromagnetic interference .
4. No crosstalk, good confidentiality
The outer cladding structure of the optical fiber absorbs leaked light, prevents light wave signal leakage, prevents crosstalk between adjacent cables, and prevents information from being eavesdropped.
fiber
4. Comparison of DSL, Ethernet cable, and optical fiber
DSL is an early product of the Internet and is suitable for broadband access to home networks, but it has gradually been eliminated and replaced by Ethernet cables. So far, Ethernet cables have played an important role in wired networks. Optical fibers have been widely used because of their advantages, especially in areas such as data centers that require high bandwidth.
material
DSL and Ethernet cables both use copper cores, while optical fibers are made of glass fibers.
Transmission mode
DSL and Ethernet lines transmit signals in the form of electrical pulses, while optical fibers transmit signals in the form of optical pulses.
Transfer rate
If VDSL is used, the maximum downlink rate can reach 52Mbit/s. The transmission rate of Ethernet cables can be 1000 Mbit/s, 10 Gbit/s, or even 40 Gbit/s. The transmission rate of optical fiber is much higher than that of network cable .
transmission distance
DSL The transmission distance shall not exceed 5.5 kilometers (RASDL). The theoretical transmission distance of Ethernet cables is 100 m. The theoretical transmission distance of Class 8 network cables is only 30m, the transmission distance of single-mode optical fiber can reach 10~20 kilometers, and the transmission distance of multi-mode optical fiber can reach 2~3 kilometers, which is far higher than the transmission distance of Ethernet cables.
security
optical fiber is made of quartz , which has good security and anti-interference. Therefore, the security of optical fiber is higher than that of DSL and Ethernet cables.
5. Summary
DSL, Ethernet cable, and optical fiber are the three cables we are more familiar with. Among them, DSL will slowly exit the stage of history. Ethernet cables and optical fiber are currently the most frequently used. This article introduces what DSL is, what Ethernet cable is, and what optical fiber is. Finally, it also compares it. I hope this article will be helpful to you to understand DSL, Ethernet cable, and optical fiber. Thank you for reading.
