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X

X-INSUM - Executive Intelligence Summary

X-Bus - Used to connect the shelves on a Promina 800 node.

X - subscriber or net traffic key

X.21 - A serial data interface for synchronous data popular in Europe. X.21 uses balanced data and unbalanced signal lines.

X.25 - A CCITT recommendation that specifies the interface between user data terminal equipment (DTE) and packet switching data circuit-terminating equipment (DCE).

X/L - cross link

XA - extended architecture

xcvr - receiver

XCVR - tranceiver

XDDCMP - External Digital Data Communications Message Protocol

XDR - extended data representation

xDSL - generic (specialized) digital subscriber line

XHMTL - extensible HTML

XID - transaction ID

XIDB - Extended Intelligence Data Base

XMIT - transmit

XML - Extensible Markup Language

XMP - cross-management platform

XMSN - transmission

XMT - transmit

XMTD - transmitted

XO - executive officer

XPE - cross-platform environment

XPG - X/Open Portability Guide

Xport - External port on a DMD module.

XRF - extended recovery facility

XSL - extensible stylesheet language

XT - crosstalk

XTACACS - Extended Terminal Access Controller Access Control System

XTC - external transmit clock

XTI - X/open transport interface

XTRA - extra

XVAR - X variable

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