Operations and Maintenance Manual

MPR 4.1

Reader Appendix

Confidential UM UM360479-100 Revision: Draft B4 Page 153 of 246

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Kapsch TrafficCom

Term

Meaning

Reference or example

UDP

User Datagram Protocol

an Internet protocol that is faster than TCP but offers no error

correction

Underwriter Laboratories

Underwriter Laboratories Inc.

URL

Uniform resource locator

USB

Universal Serial Bus

Standard protocol for peripherals, enables plug-and-play

UTC

Coordinated Universal Time

the time standard used to regulate time around the world

VAC

Voltage AC

VDC

Voltage DC

VSWR

Voltage Standing Wave Ratio