Bandwidth and transmission rate are often seen as synonyms, but if you've worked in the cable industry, you know that the two terms actually mean very different things.
Internet service providers may be touting speeds of up to 500 megabits per second (Mbps). In this case, they are actually referring to the transmission rate. In the cabling industry, bandwidth is a property of the cable -- the ability of the cable to transmit identifiable signals to the far end.
Any signal transmitted by a copper or fiber optic link will decay when it reaches the far end. This is not just a signal loss, but also a number of more complex factors, such as return loss (reflection) and, in the case of copper cored cables, crosstalk. Cable manufacturers design their copper or fibre-optic cables to transmit these raw signals at higher rates.
For copper cables, you may have heard that Type 6 network jumpers have a bandwidth of 250MHz and Super 6 network jumpers have a bandwidth of 500MHz. Bandwidth parameters are usually printed on the cable casing. This causes a lot of confusion because we assume that the bandwidth of the network is expressed in megabits per second or gigabits per second. This doesn't mean we were wrong -- Super Six network jumpers can run at up to 500MHz of bandwidth, while the network's bandwidth can reach 10Gb/s.
So why use megahertz (MHz) to define various class-level cable bandwidths? A megahertz is a unit of frequency, or the number of times a wave completes a cycle in one second -- 1 Hertz is equivalent to one cycle in one second, and 1 megahertz is equivalent to a million cycles per second. The relationship between speed and frequency is a bit complicated, but in short, more frequency is needed to carry more bits of data. Each bit of data is encoded on a carrier frequency, and the amount of data that can be transmitted per second depends on the signal encoding scheme of the transmitting device.
Cable factory, network jumper, shielding cable
First, bandwidth,
1, is to measure the number of oscillations of electrical signals in the line per unit time
2, the channel can be transmitted without distortion of the signal frequency range
3. Unit: MHZ
Second, transmission rate
1. Is a measure of the number of binary bits transmitted over a line per unit time
2. The data transmission rate is determined by the number of oscillations of the electric signal in the line per unit time and the number of bits carried by each oscillation
3. The unit is Mb /s or Mbps
For example: bandwidth is equivalent to the road, the transmission rate is equivalent to the car. An increase in bandwidth means an increase in capacity, not an increase in car speed. There are many factors that affect the speed of the car, such as operating system, communication transmission protocol on the network, and transmission mode. It is generally assumed that high bandwidth means high speed because the roads are wide and the network is not congested. But high speed is not necessarily high bandwidth. For example, 1000Mbit /s Gigabit Ethernet adopts the full duplex working mode of 4 pairs of lines, and only requires 100MHz for its transmission bandwidth.
Kingwire
Network Cable manufacturer is located in shenzhen, guangdong province, the company adhering to the "customer first, forge ahead" business philosophy, adhere to the principle of "customer first" to provide our customers with quality services.
The company's main products are: network jumper, super five type of network jumper, six type of network jumper, super five type of shield, six type of shield, seven type of network cable, eight type of network cable, non-shielded/shielded network cable and other products. The length of the network jumpers can be produced according to customer requirements, and a variety of colors can be selected.
I plant has a professional technical personnel, professional workshop, and equipped with a leading domestic level of inspection equipment. Can quickly and accurately meet customer requirements. We have the confidence and ability to adhere to the market-oriented, quality as the basis, realistic innovation, excellence, strive to be the industry pioneer, to create a well-known brand, to meet the requirements of different levels of customers.
July 01, 2021
