User's Manual

UniLink UL-800/801 FANS
SCN 30.X
Operator’s Manual
23-20-06.02 135
December 2011
Acronym/Abbreviation/
Term
Description
RX
Receive
SAT
Abbreviation for Satellite Communications
Link. The SAT link provides
communication via Iridium Short Burst
Data (SBD) and packet mode data
Inmarsat equipment that utilizes a
specific satellite constellation. When SAT
is commanded for use by UniLink, a SAT-
configured ARINC 429 (741 protocol) port
is used. SAT provides VHF backup in
most cases and does not support weather
graphics.
SatCom
Satellite Communications
SCN
Software Control Number
SDU
Satellite Data Unit
SELCAL
Selective Calling
SIGMET
Significant Meteorological Information
SITA
Society of International Aeronautical
Telecommunications (Societe
Internationale de Telecommunications
Aeronautiques)
SQP
Signal Quality Parameter
SSDTU
Solid State Data Transfer Unit (UASC)
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. The circuit mode connection will be
used for obtaining color weather graphics
and may be used for VHF back up in most
cases. However, this link will not support
safety services communications, which
consists of flight information services,