User's Manual
UniLink UL-800/801 FANS
SCN 30.X
Operator’s Manual
23-20-06.02 43
December 2011
ADS-C NORM/EMRG – Pressing LSK [2R] toggles the ADS-C
application mode between Normal and Emergency. This will also
change the ADS-C mode on the ATC EMERGENCY page (and vice
versa).
The ATC LOG ON page 2/2 (ADS-C STATUS) – Pressing the [NEXT]
key displays the Status of each ADS-C connection (including ACARS
address, periodic contracts, event contracts, and emergency/normal
mode).
Controller-Pilot Datalink Communications (CPDLC)
CPDLC is a two-way datalink system allowing controllers at a CDA to
communicate text messages to the crew instead of using traditional
voice communications.
When a successful AFN log on is established, a CPDLC connection
can be made by the CDA. When the CDA establishes a CPDLC
connection, the CPDLC status displayed at LSK [3R] changes from
INACTIVE to ACTIVE. Selecting TERMINATE at LSK [3R] breaks all
exiting CPDLC connections, returning the CPDLC status to
INACTIVE. An ATC facility cannot establish another CPDLC
connection with UniLink until the user performs another successful
AFN log on.
NOTE: The crew should exercise prompt response/closure following
receipt of a CPDLC uplink. Open CPDLC uplinks should not
be deleted.
CURR (Current) ATC and NEXT ATC
These fields display the identifiers for the CDA and Next Data
Authority (NDA).
Exiting a FANS Service Area:
Approximately 15 minutes after exiting CPDLC or ADS-C service
areas, the following should display:
ATC LOG ON 1/2:
• The CURR ATC and NEXT ATC fields on ATC LOG ON 1/2
display dashes
• The CPDLC field, LSK [3R] displays INACTIVE
• The ADS-C field, LSK [1R] displays either ENABLED or
DISABLED (but not ACTIVE)