4-Wire Call Control; Ground-To-Air Call Decision - Honeywell ASPIRE-400 System Description, Installation And Maintenance Manual

SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL
(b)
(4) Whenever a 4-wire call is released by either:
(a)
(b)
D.

4-Wire Call Control

(1) Call control inputs are used to place, accept and end calls and to key the Air-to-Ground
audio connection. The SDU accepts control inputs from:
(a)
(b)
(c)
(2) The SDU supports two modes of call control:
(a)
(b)
E.

Ground-to-Air Call Decision

NOTE:
(1) The ACD routes, rejects, or re-directs to PS the Ground-to-Air CS safety voice calls
according to the call decision logic defined by:
(a)
(b)
(2) The ACD PBX retrieves priority in Ground-to-Air CS calls from:
(a)
(b)
(3) The following figure describes the incoming call decision logic for the PS channel:
EFFECTIVITY
ALL
© Honeywell International Inc. Do not copy without express permission of Honeywell.
ASPIRE-400
And the ORT indicates standard call discretes, the ACD asserts in SDU to CMU
label 270:
1 Bit 26 if the call is on 4wire 1
2 Bit 27 if the call is on 4wire 2.
The ground side OR
The air side, the ACD:
1 De-asserts the associated call light discrete for the channel if the ORT
indicates standard call discretes
2 De-asserts the associated SATCOM Voice Communications bit (bit 26
for channel 1, bit 27 for channel 2) in SDU to CMU Label 270.
Cockpit Voice Mic On Discrete
Call Place/End discrete
Call-display-and-control protocol (e.g. via MCDU).
Latched: Bidirectional audio path is present while the call is connected
Push-to-talk call: Air-to-Ground audio only present when call is connected and
the Mic is activated.
This figure is descriptive to aid understanding, explicit requirements cover the content.
BGAN CS routing and preemption
Voice ORT configuration.
the eMLPP priority value in the incoming circuit switch message (Report Status)
from CC if present else,
set the call priority as Public.
23-15-49
3rd rvw Draft as of:
29 January, 2020
Page 2-31
22 Apr 2019