User's Manual

UL-801 Installation Manual
Page A1-5
23-20-06 15 December 2011
Acronym/Abbreviation/Term Description
TEL Abbreviation for telephony. The telephony communication
link provides a circuit mode data connection via a dial-up
modem. A hand shake must be established prior to data
being exchanged. Only an RS-232 capable SatCom can be
used.
TWIP Terminal Weather Information for Pilots
TX Transmit
UASC Universal Avionics Systems Corporation
UL UniLink (UASC)
UM Uplink Message
Unverified Message An Unverified message is one that does not contain
safeguards to prevent data corruption during transmission.
Such messages are labeled AOC on the page in which they
are displayed. See Verified Message.
USB Universal Serial Bus
UTC Universal Time Coordinated
VDL VHF Digital Link
VDR VHF Data Radio
Verified Message A Verified message is one that has been safeguarded
against potential data corruption during transmission and is
determined to be error-free using CRC code comparisons
and validity indicators. See Unverified Message.
VHF Very High Frequency terrestrial-based packet mode. This is
a data communications link used for obtaining textual
weather, D-ATIS, and the transmission of position
reporting, OOOI, and safety services communications
(UniLink Flight Information Services). Does not support
weather graphics.
VOX Voice
VSWR Voltage Standing Wave Ratio
WOW Weight On Wheels
WPT Waypoint
WX Weather
XMT Transmit
XOFF Transmission Off
XON Transmission On