What are the differences between optical fiber jumpers and copper wires? With the development of the times, optical fibers have gradually replaced copper wires as the mainstream connecting devices. Of course, there are always more controversies in the choice of optical fibers and copper wires, and even Many friends think that the delay of the fiber line is shorter than the delay of the copper wire. So, what are the differences between the fiber jumper and the copper wire?
1. What are the differences between fiber jumpers and copper wires?
Optical fiber and copper wire are two common data center transmission media, both of which have anti-interference and good confidentiality. So what is the difference between fiber and copper wire? The difference between the two is mainly reflected in the following four aspects:
1. Transmission distance
Generally speaking, the transmission distance of copper wire does not exceed 100m, and the maximum transmission distance of fiber can reach 100km (single mode fiber), which far exceeds the transmission distance of copper wire.
2. Transmission rate
At present, the maximum transmission rate of copper wire can reach 40Gbps (such as eight types of network cable, DAC passive copper cable), and the maximum transmission rate of optical fiber can reach 100Gbps (such as OM4 fiber jumper), far exceeding copper wire.
3. Maintenance management
The operation of the crystal head of the copper wire and the port connection of the device is very simple, and the operations of shear welding and equipment connection of the optical fiber are required to be high and the operation is complicated.
4. Price cost
In the case of the same length of fiber and copper wire, the price of fiber is generally 5-6 times the price of copper wire, and the price of fiber-optic plug-in equipment (such as fiber coupler) is much higher than that of copper wire. In terms of price cost, the price cost of fiber is much higher than the price of copper wire.
Second, how the delay of the fiber jumper and copper wire
1, fiber jumper
Because fiber is currently used more, let's first look at the delay of the fiber.
Physical knowledge, the speed of light in a vacuum is 3 * 10 8 square meters/sec, the speed of light will be slower under air conditions. Therefore, when an optical signal propagates in a fiber link, there are five steps to wait: the electrical signal is converted into an optical signal to produce two; the optical signal is generated through the optical fiber, and the optical signal is converted into an electrical signal to produce two.
2, copper wire
The signal quality of copper wires is not as good as that of optical fibers. Especially in long-distance transmission, signals are easily interrupted by the surrounding environment. The longer the distance, the more severe the attenuation. Frequently caused by client loss, page faults, slow user opening, etc.
Third, the delay of fiber jumper and copper wire contrast
The difference in delay between fiber and copper wire theoretically means that the signal is transmitted faster in the copper wire, but under long-distance demand, the signal processing and repetition requirements are less, the fiber delay is lower, and the copper wire is susceptible to the outside. The interference, the loss is large, and the delay is also larger.
In fact, we don't have to delay to describe the fiber and the network, which are described by distance and speed. Different distances and speed delays are different. For example, serializing a 150-byte packet on a 1.5 Mbps link requires 8 ms, while at 10 Gbps it only requires 1.2 us, and at high speeds, there is less latency.
For the difference between the fiber jumper and the copper wire, I would like to see that the friends here have already got a certain understanding of this. In fact, the difference in delay between the fiber jumper and the copper wire is affected by the speed and distance. In the choice of the fiber jumper and the copper wire, if the distance is short, we can choose the copper wire as the transmission medium, the cost. It will be much lower than the fiber jumper. On the contrary, if it is transmitted over long distances, we can choose the fiber as the transmission medium, and its performance will be more stable.
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