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Acronyms and Abbreviations in Telecommunications - InterConnect ...

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148 <strong>Acronyms</strong> <strong>and</strong> <strong>Abbreviations</strong> <strong>in</strong> <strong>Telecommunications</strong><br />

X, Y <strong>and</strong> Z<br />

XA Exchange Access (SMDS)<br />

X-Bar Crossbar Telephone Exchange<br />

XC Cross-Connect<br />

xcvr Receiver<br />

XDF Extended Distance Feature<br />

xDSL Generic Term for Digital Subscriber L<strong>in</strong>e<br />

xfmr Transformer<br />

XID Exchange Identification (HDLC)<br />

xistor, xstr Transistor<br />

XMIT Transmit<br />

XML Extensible Markup Language<br />

XMS Extended Memory Specification<br />

XMSN Transmission<br />

XMTD Transmitted<br />

XMTR Transmitter<br />

XNS Xerox Network Systems<br />

XOFF Transmitter Off<br />

XON Transmitter On<br />

XPD Cross Polarisation Decoupl<strong>in</strong>g<br />

XSM r X Session Manage<br />

XT Crosstalk<br />

XTagATM Extended Tag ATM<br />

Y2K Year 2000<br />

ZBTSI Zero Byte Times Slot Interchange

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