Users Manual

ALL

EFFECTIVITY

Page 2-36

22 Apr 2019

23-15-49

SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL

ASPIRE-400

(1) CS call setup messages are sent via the serial control link between them ACD and the

Safety Channel Card.

(2) CS voice data are sent via the serial voice link between the ACD and the Safety Channel

Card.

(3) The ACD PBX initiates CS Air-to-Ground calls by messaging the following to the safety

Channel Card:

(a) The dialed number

(b) ICAO as the calling party number

(4) If a new cockpit Air to Ground call is requested during handover, the ACD accepts the call

but postpones the call initiation to the ground until:

(a) Safety Logon is achieved at the 1st satellite link Network Logon attempt, then

initiate the call once Safety Logon is achieved OR

(b) The pilot terminates the call, then terminate the call OR

reject the call.

(5) If informed by the Channel Card that any of the following activations triggered by the

Safety voice CS initiation has failed:

(a) The eMLPP registration,

(b) Call waiting activation the ACD continues to service voice calls.

NOTES:

1 Absence of eMLPP will prevent sending the priority field

2 Absence of call waiting will prevent the new call from being presented to

the AES when a call is already in progress.

(6) If an annunciated CS Ground-to-Air call is accepted, the ACD PBX:

(a) Commands the Channel Card to accept the AMBE +2 call set up AND

(b) When established, connects the call through the Serial voice link to the routed 4-

wire port.

(7) When a CS Air-to-Ground call is connected, the ACD PBX connects the call through the

Serial voice link to the routed 4-wire port.

J. PS (SIP) Voice Service

(1) The ACD PBX implements for PS calls:

(a) A SIP version 2 RFC 3261 User Agent

(b) UDP transport of SIP signaling

(2) The ACD PBX responds to SIP OPTIONS polling from the network.

NOTES:

1 Absence of eMLPP will prevent sending the priority field

DRAFT

3rd rvw Draft as of:

29 January, 2020