| Term | Definition |
|
X.21
|
Recommendations developed by CCITT that define a protocol for
communication between user devices and a circuit-switched network.
|
|
X.25 data protocol
|
A packet switching standard developed in the mid-1970s for
transmission of data over twisted pair copper wire.
|
|
X.400
|
International standard for a store-and-forward message handling
system in a multivendor environment.
|
|
XA
|
eXtended Architecture.
|
|
XCA
|
eXternal Communication Adapter.
|
|
xDSL
|
Digital subscriber lines that allow simultaneous two-way
communication of voice and data over regular phone lines.
|
|
XMT
|
TransMiT.
|
|
X-on X-off Protocol
|
An extension of the TTY protocol which uses additional Transmission
On (X-on) and Transmission Off (X-off) characters to accommodate
differences in speed between the transmitter and the receiver.
|
|
XPC
|
A set of protocols developed by Tymnet to allow asynchronous
terminals to connect to and use their X.25 packet switched network.
|
|
XTAL
|
crysTAL.
|
|
XTC
|
Fiber optic connector developed by OFTI.
|
PRODUCT NEWS
LANGUAGES