Users Manual

ALL
EFFECTIVITY
© Honeywell International Inc. Do not copy without express permission of Honeywell.
Page 2-34
22 Apr 2019
23-15-49
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL
ASPIRE-400
NOTE: This figure is descriptive to aid understanding, explicit requirements cover the
content.
(4) The ACD routes or rejects an incoming PS safety voice SIP call (SIP:INVITE) according
to the call decision logic defined by:
(a) BGAN PS routing and preemption
(b) Voice ORTconfiguration.
(5) The ACD PBX determines priority in Ground-to-Air VoIP calls from:
(a) the SIP header Resource-priority field for VoIP calls if present, else,
(b) set the call priority as Public.
F. Push-to-Talk (PTT) Cockpit Call Control Mode
(1) The ACD PBX operates in PTT mode when ORT activated.
(2) In PTT mode, the ACD initiates air-to-ground call, based on either of the following:
(a) MAKE CALL command from the call-display-and-control protocol
(b) A transition of the associated Cockpit Voice Mic On discrete if ORT enabled for
Preselect.
NOTE: The Call Place/End discrete is not used for placing calls.
(3) If in PTT mode, the ACD PBX accepts a ground-to-air annunciated call (enter
CONNECTED state) on any of the following conditions:
(a) ANSWER CALL command received on the call-display-and-control protocol
(b) The first transition of the associated Cockpit Voice Mic On Discrete.
(4) In PTT mode, when a call is CONNECTED, the ACD:
(a) Activates cockpit microphone when the associated Cockpit Voice Mic On
discrete is on, and
(b) Mutes the cockpit microphone when the associated Cockpit Voice Mic On
discrete is off.
(5) In PTT mode, the ACD initiates an Air Clear (reverting the call state to idle from the
airplane side) on any of the following conditions:
(a) END CALL is signaled on the call-display-and-control protocol
(b) The associated Call Place/End Discrete transitions to Call End.
G. Latched Call control mode
(1) The SDU operates in Latched mode when configured by ORT.
(2) In Latched mode, the ACD initiates air-to-ground call, based on either of the following:
(a) A MAKE CALL command from the call-display-and-control protocol.
(b) A transition of the associated Cockpit Voice Mic On discrete if ORT enabled for
Preselect.
NOTE: The Call Place/End discrete is not used for placing calls.
(c) In Latched mode, the ACD accepts an annunciated Ground-to-Air call (enter
CONNECTED state) on any of the following:
DRAFT
3rd rvw Draft as of:
29 January, 2020