Why is the uplink speed different from the downlink speed

ADSL, full name Asymmetric Digital Subscriber Line. Chinese translation of asymmetric digital subscriber loop, or asymmetric digital subscriber loop.

ADSL allows asymmetrical, high-speed data transmission over a pair of twisted-pair copper wires without impacting existing POTS** services. ADSL uplink rate is 224kbps 640kbps, downlink transmission rate; The transmission distance is in kilometers.

ITU-T SG15 adopted draft SUM Recommendations on ADSL in October 1998. The ADSL system with separator is standardized, and the system can transmit high-speed data and analog signals on the same pair of metal twisted pair wires, and the line code used is DMT, the downlink rate is, and the uplink rate is standardized ADSL system without splitter, it is a simplified ADSL (lite ADSL), which has the advantages of low cost and easy installation, and also adopts DMT line coding, and the downlink rate is 512kbps.

The ADSL used is an asymmetric transmission method, i.e., the uplink rate is not equal to the downlink rate; ADSL has an uplink rate of 640Kbps to 1Mbps and a downlink rate of 10Mbps to 100Mbps.

The common is 20Mbps, note that the downlink rate is not equal to the ** rate, usually** software or movies can often only reach 1Mbps, not 20Mbps, in fact, 20M broadband is 20M bit (bit) instead of 20M byte (byte).

For LAN or FTTH access broadband users:

1) Broadband with a downlink rate of less than or equal to 4Mbps and an uplink rate of 512kbps;

2) For broadband with a downlink rate greater than 4Mbps but less than 20Mbps, the uplink rate is 1Mbps;

3) For broadband with a downlink rate greater than or equal to 20Mbps but less than 100Mbps, the uplink rate is 2Mbit/s;

4) Broadband with a downlink rate equal to 100Mbps and an uplink rate of 4Mbps.

5) Broadband with a downlink rate equal to 200Mbps and an uplink rate of 10Mbps.

For the broadband accessed by ADSL ADSL2+ VDSL, the uplink rate is 512Kbps.

For the above content, please refer to: Encyclopedia - Uplink Rate.

The explanation is as follows: 1. In many environments, the uplink speed and downlink speed are not the same.

2. Generally, in the asymmetrical field, the downward speed is greater than the upward speed.

3. Internet access includes the speed of obtaining data from the network and transmitting data to the network, and in many cases, the bandwidth or speed of these two directions is different. This is called downlink bandwidth and uplink bandwidth in technical terms, which can be understood as receiving speed and upload speed.

4. Theoretical speed refers to the most ideal speed, that is, the speed calculated according to the theory under the most ideal conditions, and it is also the network bandwidth of the network service to call back the trademark.

Upstream speed and downlink speed refer to the two directions of speed when transmitting data in the Spike Roll broadband network. In general, upload speed refers to the speed at which data is transferred from the user's device to the network, while speed refers to the speed at which data is transferred from the network to the user's device. Upload speed and speed are both very important indicators when it comes to computers or other connected devices, or when uploading files, browsing the web, playing games, and other online activities.

By extension, upload and speed may have different needs for different tasks and applications. For example, upload speed may be more important for users who use cloud storage, as they need to upload files to a cloud storage service so that they can be shared and accessed across different devices. And for gamers, speed may be more important, as they need to quickly transfer game data to their devices to ensure the smoothness and stability of the game.

In addition, in actual network applications, the uplink and downlink speeds may also change due to network congestion, gateway speed limitations, and other factors. This means that if a user feels that the network is slow, they need to consider whether the uplink or downlink speed is the problem so that they can take a solution. You may need to upgrade your Bench network** or change your network service provider, or consider optimizing your network setup and how you use your equipment.