The term postmodernism has been applied both to the era following modernity, and to a host of movements within that era (mainly in art, music, and literature) that reacted against tendencies in modernism.
A CSU/DSU (Channel Service Unit/Data Service Unit) is a hardware device about the size of an external modem that converts a digital data frame from the communications technology used on a local area network (LAN) into a frame appropriate to a wide-area network (WAN) and vice versa.he Data Service Unit (DSU) manages line control, and converts input and output between RS-232C, RS-449, or V.xx frames from the LAN and the time-division multiplexed (TDM) DSX frames on the T-1 line. The DSU manages timing errors and signal regeneration.
A DSL modem, or digital subscriber line modem, is a home network device used to connect a computer or router to a telephone line for broadband Internet access.This means it is different in execution than the similar cable modem, but ultimately has the same result. DSL modem, or digital subscriber line modem, is a home network device used to connect a computer or router to a telephone line for broadband Internet access.