User's Manual

UL-801 Installation Manual
Page 5
23-20-06 15 December 2011
Hardware/Software Compatibility
The hardware versions are made available to the application software and are verified for
compatibility during power-up checks and during application software loading.
Restricted Access to the Field-Loading Function
The field-loading function is only enabled when the aircraft is on the ground and after a
password has been entered successfully.
UniLink Databases
The UniLink databases, consist of multiple database components including the Aeronautical
Operational Control (AOC) and Air Traffic Control (ATC) databases (required for FANS
operations) components, contains the definitions of nearly all user-interface screens, nearly
all uplink and downlink messages, a flight database that defines how data is formatted and
stored, and event triggers used for responses to system events. Database integrity is verified
by means of a 32-bit CRC at loading and during UniLink initialization.
D. Field-Loadable Software Interface
UniLink provides an interface to load the following databases and application software via
the UASC Data Transfer Unit (DTU-100) or UASC Solid State Data Transfer Unit
(SSDTU). Access to the software and database loading functions are password protected and
the aircraft must be on the ground. The UASC DTU physical interface is 10BaseT Ethernet.
The UniLink hardware contains a 10/100BaseT Ethernet port.
• Datalink application software
• VDR application software
• Customer database, which includes the AOC database
• ATC database
• Geographic database
UniLink provides user-interface screens that allow the user to command and monitor the
loading progression.
E. UniLink Customer, ATC, and Geographic Databases
The Field Loadable Software database system provides flexibility in response to the
changing communications, navigation, and surveillance/air traffic management environment
for current and future regulations. The Customer Database (CDB)-driven user interface and
message set can be customized by UASC to match airline or business operator’s
requirements. Each database is described below.
All UniLink systems include three databases: the Customer Database, the Air Traffic Control
(ATC) Database, and the Geographic Database, and contains the definitions of the following:
• User interface screens
• Line Select Key functions
• Message definitions for uplink and downlink messages
• A flight database, which defines how data is formatted and stored
• Event triggers used for OOOI event reporting and other responses to system events