737 Flight Crew Operations Manual
Flight Management, Navigation -
ATC Data Link
Boeing Proprietary. Copyright © Boeing. May be subject to export restrictions under EAR. See title page for details.
D6-27370-866-EGP 11.34.81
1 ATN LINK STATUS Annunciations
Possible annunciations for the status of the ATN, LOGON, and CPDLC
connection.
2 ENABLE/DISABLE CPDLC
CPDLC can be enabled/disabled from this page (only for the current flight).
COMPONENT STATUS DESCRIPTION
ATN NO COMM No ATN network layer is
available to send
CPDLC downlinks.
ATN IN COMM ATN network layer is
available to send
CPDLC downlinks.
LOGON DATA CHANGED Data has changed since
the last LOGON.
LOGON IN PROGRESS A LOGON request has
been sent and is waiting
for the ground to answer.
LOGON LOGGED OFF No LOGON has been
performed or a
self-initiated LOGOFF
has been performed.
LOGON FAILED A LOGON was
attempted and either
timed out or was refused
by the ground.
LOGON SUCCESSFUL A LOGON request has
been successfully
granted by the ground.
CPDLC UNAVAILBE No CPDLC connection
has been established
with the ground.
CPDLC AVAILABLE A CPDLC connection
has been established
with the ground.
September 15, 2016
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