User's Manual

UniLink UL-800/801 FANS
SCN 30.X
Operator’s Manual
42 23-20-06.02
December 2011
Following an unsuccessful data link
transfer to another ATSU or when
instructed by ATC
As instructed per above
LOG ON
To perform an AFN log on:
1. Verify the aircraft identification. Or press CALLSIGN, LSK [1L],
enter an aircraft call sign, and press [ENTER].
2. Press ATC, LSK [2L] to select an ATC facility. The ATC LOG ON
TO page will open for selection of a region. A region selection
opens listings of specific ATC facility identifiers. A facility ID may
also be manually entered. Selecting an ATC facility returns the
display to ATC LOG ON 1/2.
3. Once an ATC facility is selected, the LOG ON option becomes
active (arrow displays). Press LOG ON, LSK [3L] to initiate an
AFN log on downlink message.
NOTE: A successful AFN log on is indicated by SUCCESS displaying
above the LOG ON option. The ATC facility may in turn initiate
ADS-C and/or CPDLC connections with UniLink.
AFN log on failure is indicated by an ATC LOGON FAIL
advisory alert and a status of either TIMEOUT (no response to
the AFN log on downlink within 10 minutes) or ERROR (if
UniLink received an error response to the log on downlink).
The user may attempt another AFN log on or revert to voice
communications.
Automatic Dependent Surveillance-Contract (ADS-C)
ADS-C surveillance is dependent on automatic downlink information
from onboard avionics triggered by specified events or time intervals.
The ADS-C interface (provided by the ATC database) provides the
following functions:
ADS-C Disable/Enable – Pressing LSK [1R] toggles ENABLED and
DISABLED:
• ENABLED allows the ADS-C contract with ATC to be
established
• DISABLED suspends ADS-C communication and terminates
all existing contracts.