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Get info about the Encyclopedia of Networking and Telecommunicatons, 3rd edition (2001)
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Note: Many topics at this site are reduced versions of the text in "The Encyclopedia of Networking and Telecommunications." Search results will not be as extensive as a search of the book's CD-ROM.
Terminal servers (not to be confused with "terminal services," discussed under the next heading) can connect large numbers of terminals to mainframe or minicomputer systems over a LAN (local area network). The terminals are attached to the terminal server via RS-232 serial interfaces, and the terminal server is connected to an Ethernet or token ring network. The network then serves as the link between the host system and the terminals. A terminal server is basically an asynchronous multiplexer that connects not only terminals but computers, modems, printers, and other peripherals to the host system. The terminal server has a number of serial ports and the appropriate network interface.
Terminal servers are not gateways because the attached terminal devices are using a communication protocol that is compatible with the host. When a personal computer is attached to a host through a terminal server, it runs a terminal emulation program that lets it mimic the communication protocols of a terminal. Note, however, that the terminal server does encapsulate data from terminals for transport over the network to the host system.
Copyright (c) 2001 Tom Sheldon and Big Sur Multimedia.