Wyse Winterm 3000 Series User Manual page 78

Glossary 6
Thin-client
Timeout
Total Cost of Ownership (TCO) A model that helps IT professionals understand and manage the budgeted
Touch screen
USB
Virtual Port
WAN
Windows Terminal Server
Windows-based Terminal
WinFrame
A low-cost computing device that works in a server-centric computing
model. Thin clients typically do not require state-of-the-art, powerful
processors and large amounts of RAM and ROM because they access
applications from a central server or network. Thin clients can operate in a
Server-based Computing environment.
A time interval within which certain operations must occur; for example, the
time allotment for the terminal to connect to a login host. After the timeout,
the process can either be repeated or discontinued.
(direct) and unbudgeted (indirect) costs incurred for acquiring, maintaining
and using an application or a computing system. TCO normally includes
training, upgrades, and administration as well as the purchase price.
Lowering TCO through single-point control is a key benefit of Server-based
Computing.
A type of display screen that has a touch-sensitive transparent panel that
can sense when someone is touching it, and is able to furnish a computer
with precise information as to exactly where on the screen the touch
occurred. Touch screens are used with software that uses the information
provided by the screen touch to respond to user requests.
Universal Serial Bus. An external peripheral interface standard for
communication between computer and external peripherals over an
inexpensive cable using biserial transmission. USB is standard on current
(1999) Macintosh computers and is promoted by Intel as an option for the
IBM PC where it is supported by later versions of Windows 95. USB works at
12 Mbps with specific consideration for low-cost peripherals. It supports up
to 127 devices and both isochronous and asynchronous data transfers. USB
cables can be up to 5 meters long and include built-in power distribution for
low-power devices. It supports daisy chaining through a tiered star multidrop
topology.
Incoming Telnet and rlogin connections are not associated with a physical
port. Instead, they are associated with a virtual port, port 0, which serves for
the duration of the connection. Each virtual port is created with a default set
of characteristics. The Define Port commands can be used to customize a
virtual port during the Telnet/Rlogin session; however, these customizations
can not be saved. The port reverts to the default set of characteristics when
the session is closed.
Wide Area Network. A data-communications system covering a large
geographic area, usually digital circuits having moderate to high data rates
(e.g., 56 to 64 kbps up to 1.5 to 2 Mbps).
A network device that is attached to non-network serial devices, such as
terminals, printers and modems, or to an Ethernet network.
A fixed-function thin-client device that connects to a Citrix WinFrame or
MetaFrame server and Terminal Server to provide application access. The
key differentiator of a WBT from other thin devices is that all application
execution occurs on the server; there is no downloading or local processing
of applications at the client.
A multi-user Windows application server, based on Windows NT, developed
under license from Microsoft.