Does optical fiber belong to a communication device in the network?
Asymmetry is mainly reflected in the uplink rate (maximum 640Kbps) and downlink rate (maximum 8Mdps) asymmetry. Uplink (from user to network) for low speed transmission, up to 640Kbps; downlink (from network to user) for high-speed transmission, up to 8Mbps. It was mainly developed for video on demand service. With the development of technology, it gradually became a more convenient broadband access technology, which was paid more attention to by the telecom department. Set-top boxes via Internet TVMany network applications that can not be implemented at low rates can be implemented.
Optical fiber, xDSL (ADSl, HDSL), ISDN (strictly speaking is not a broadband ADSL:ADSL is English Asymmetrical Digital) Subscriber Loop (asymmetric digital subscriber line) of the English acronym, ADSL technology is a new technology of high-speed broadband operation in the original common line, it uses a pair of existing copper telephone lines, to provide on the downlink transmission rate asymmetric for users (bandwidth).
Broadband has not yet been accepted as a definition. It is understood from a general perspective that it can meet the bandwidth required by people to feel the transmission of various media over the networkTherefore, it is also a dynamic and developing concept. The current broadband for home users, refers to the transmission rate of more than 1M, can meet the voice, images and other large amount of information transmission needs.
