ADSL (Asymmetric Digital Subscriber Line) is a technique of asymmetric digital subscriber lines to implement broadband access interconnection network, and ADSL acts as a transport layer technology, making full use of existing copper wire resources, in one A bandwidth of the upstream 640kbps (theoretical upstream 1Mbps) is provided on the twisted pair, thereby overcoming the "bottleneck" of the traditional user in the "last kilometer" to achieve the true broadband access.
Upper rate is generally the speed of uploading from your computer, saying that others communicating from your computer.
General ADSL Internet access and downstream speed is asymmetrical, meaning is not the same as the uplink rate is different, now 1M ordinary is upstream: 386kbit, down: 1024kbit, 2M upstream: 386kbit, Down: 2048kbit
Note: Bit is bit byte is byte, usually the download speed generally refers to byte byte. The 2m bandwidth said by Telecom is actually referring to bit (BIT) instead of byte (byte)
actual download speed should be calculated according to this formula: 8bit (bit) = 1byte (byte) For example, you have a 2M broadband 2Mbit (bit) = 2048kbit (bit), 2048/8 = 256kbyte (byte), because our computer defaults to define the file size unit is Byte (bytes) so our download speed It is generally referring to bytes instead of bit (BIT), so our actual download speed is equal to the bandwidth divided by 8.