|.TERM|X/Open Transport Interface
|.ACR|
	|.DEFIN|1|Protocol-independent, transport-layer interface for applications.
XTI consists of a series of C language functions based on TLI, which in turn
was based on the transport service definition for the OSI model.
		|.XREF|XTI
		|.BOOK|OSNetAppProgGd
		|.TOPIC|
|.TERM|X.121
|.ACR|
	|.DEFIN|1|The 121st CCITT recommendation in the X series, defining a
naming convention for the network user address (NUA).
		|.XREF|
		|.BOOK|
		|.TOPIC|
|.TERM|X.21
|.ACR|
	|.DEFIN|1|In data communications, a specification of the CCITT that
defines the connection of data terminal equipment to an X.21 public data
network for digital leased and circuit switched services.
		|.XREF|
		|.BOOK|
		|.TOPIC|
	|.DEFIN|2|\s12\fH In X.25 communications, the 21st CCITT recommendation in
the X series, defining a general purpose interface between a DCE and a DTE
for synchronous operation on public data networks.
		|.XREF|
		|.BOOK|
		|.TOPIC|
|.TERM|X.21 bis
|.ACR|
	|.DEFIN|1|A CCITT recommendation, defining the use on public data networks
of DTEs designed for interface to synchronous V series modems.
		|.XREF|
		|.BOOK|
		|.TOPIC|
|.TERM|X.25
|.ACR|
	|.DEFIN|1|A recommendation from the Consultative Committee on
International Telegraph and Telephone (CCITT) for the interface between data
terminal equipment and packet-switched data networks.
		|.XREF|
		|.BOOK|
		|.TOPIC|
	|.DEFIN|2|\s12\fHThe 25th CCITT recommendation in the X series, defining
protocols between a DCE and a DTE.
		|.XREF|
		|.BOOK|
		|.TOPIC|
|.TERM|X.25 line
|.ACR|
	|.DEFIN|1|In X.25 communications, the physical link between the DTE and
the DCE, and the service subscribed to.\s12\fH
		|.XREF|
		|.BOOK|
		|.TOPIC|
|.TERM|X.25 link
|.ACR|
	|.DEFIN|1|The X.25 line from the X.25 adapter to the modem. In the X.25
API, a link is equivalent to an X.25 port.
		|.XREF|X.25 port
		|.BOOK|
		|.TOPIC|
|.TERM|X.25 port
|.ACR|
	|.DEFIN|1|A device in the \s12\f(HB/dev\s12\fH that corresponds to an X.25
link
		|.XREF|X.25 link
		|.BOOK|
		|.TOPIC|
|.TERM|X.27
|.ACR|
	|.DEFIN|1|A specification of the CCITT that defines electrical
characteristics for balanced double-current interchange circuits (same as
CCITT V.11, and similar to EIA RS-422A).
		|.XREF|
		|.BOOK|
		|.TOPIC|
|.TERM|X.32
|.ACR|
	|.DEFIN|1|The 32nd CCITT recommendation in the X series, defining the
interface between DTEs and packet-switching networks through a public
switched network, such as a public telephone network.
		|.XREF|
		|.BOOK|
		|.TOPIC|
|.TERM|xcomms
|.ACR|
	|.DEFIN|1|In X.25 communications, the command that provides a menu panel
for other X.25 commands.
		|.XREF|
		|.BOOK|
		|.TOPIC|
|.TERM|XDS
|.ACR|
	|.DEFIN|1|X/Open Directory Service.
		|.XREF|
		|.BOOK|introDCE
		|.TOPIC|
|.TERM|xmanage
|.ACR|
	|.DEFIN|1|In X.25 communications, the command that enables system managers
to manage X.25 ports.
		|.XREF|
		|.BOOK|
		|.TOPIC|
|.TERM|Xmodem protocol
|.ACR|
	|.DEFIN|1|A communications protocol in which messages are sent in blocks
of 128 characters, surrounded by control characters. This protocol also uses
\s12\f(HBChecksum\s12\fH for error checking.
		|.XREF|
		|.BOOK|
		|.TOPIC|
|.TERM|xmonitor
|.ACR|
	|.DEFIN|1|In X.25 communications, the command that enables system managers
to monitor activity on X.25 ports.
		|.XREF|
		|.BOOK|
		|.TOPIC|
|.TERM|XOM
|.ACR|
	|.DEFIN|1|X/Open Object Management.
		|.XREF|
		|.BOOK|introDCE
		|.TOPIC|
|.TERM|XON/XOFF protocol
|.ACR|
	|.DEFIN|1|An asynchronous protocol used in communications between
computers, or between computers and devices such as printers or workstations
to synchronize I/O between the devices.
		|.XREF|
		|.BOOK|
		|.TOPIC|
|.TERM|xroute
|.ACR|
	|.DEFIN|1|In X.25 communications, the command that enables system managers
to manage the routing list.
		|.XREF|
		|.BOOK|
		|.TOPIC|
|.TERM|xtalk
|.ACR|
	|.DEFIN|1|In X.25 communications, the command that enables users to
converse with other users, exchange messages and files, and manage address
lists.
		|.XREF|
		|.BOOK|
		|.TOPIC|
|.TERM|XTI
|.ACR|
	|.DEFIN|1|Protocol-independent, transport-layer interface for applications.
XTI consists of a series of C language functions based on TLI, which in turn
was based on the transport service definition for the OSI model. 
		|.XREF|
		|.BOOK|DesignofOS
		|.TOPIC|
	|.DEFIN|2|*
		|.XREF|X/Open Transport Interface
		|.BOOK|OSNetAppProgGd
		|.TOPIC|
|.TERM|X Window System
|.ACR|
	|.DEFIN|1|A network-based graphics windowing system.
		|.XREF|
		|.BOOK|MotifUsersGd
		|.TOPIC|
