Users Manual

ALL

EFFECTIVITY

Page 5-32

22 Apr 2019

23-15-49

SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL

ASPIRE-400

(d) Undefined code.

(6) The ACD waits until the next power cycle to attempt a re-log in after the ACD ADGW

receives one of the following logon failure response codes from the GDGW:

(a) 1000 1111 Invalid parameter of undefined type

(b) 1011 0001 ICAO not authorized for safety services

(d) 1011 0011 AES deactivated

(e) 1011 0100 Radius Authentication failure.

NOTE: If all requested services are rejected, this implies that safety data

goes idle until power cycle, but voice, AISD, and PIESD may run.

(7) The ACD uses the following configurations sent from the ground in the AAPv2 ADGW

logon-response message for ACARS messaging:

(a) ac_acr_t1 time out period for ACARS messages

(b) ac_acr_r1 Air-to-Ground retry times.

NOTE: There is no ACARS queueing in the ADGW so any new message

arriving before acknowledgement of a previous message results in

the discard of the previous message and any associated timers/

counters.

(8) When enabled for ATN/OSI service, the ACD uses the following configurations sent from

the ground in the AAPv2 ADGW logon-response message for ATN messaging:

(a) ac_atn_t1 time out period for ATN messages

(b) ac_atn_r1 Air-to-Ground ATN retry times.

10. Aircraft Facing Voice Handling

A. 4-Wire Interface Configuration

(1) The ACD sets the Cockpit (4-Wire) output audio levels according to ORT values:

(a) Within at least the range 5 mW to 40 mW for a nominal digital voice level of - 9.8

dBm0 (-3 dB to +6 dB with respect to a level of 10 mW measured into a 600-ohm

load.);

(b) Where the values provide monotonic gain control with a nominal step size of 1.5

dB.

(2) The ACD sets the side tone audio levels for the Cockpit (4-Wire) audio interfaces

according to ORT values:

(a) Muted

(b) Within at least the range 0 to -12 dB with respect to the speaker output level

when:

1 Speaker level 9.8 dBm0 at the A law pulse code modulation decoder

2 The microphone input level at the A law pulse code modulation encoder

is also 9.8 dBm.

DRAFT

3rd rvw Draft as of:

29 January, 2020