User's Guide

DRAFT
Page 1-7
17 Mar 2016
23-15-87
SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL
ARINC 781-500 SDU and SCM
© Honeywell International Inc. Do not copy without express permission of Honeywell.
4. System Interfaces
This section describes the A781-500 system interfaces.
Figure 1-3 illustrates the block diagram of the A781-500 avionics system.
Figure 1-3. A781-500 Avionics System Block Diagram
NOTE: On the aircraft, only the Ethernet3 and 4-wire ports are supported.
A. SDU
The SDU is divided into the following LRUs:
• Channel cards (2)
Cha nnel Card 2
(DABC)
Cha nnel Card 1
(Sing le BGAN )
C hann el C ard
Pr oces sor 1
Clas sic
C han nel 1
P,R &T
Cha nnel Card
Proc esso r 2 A
ISDN TE
ISDN TE
ISDN TE
Data
Processor
(DP)
ISDN
2
Ethernet
Spare
10 BT
FXS
(POTS )
FXS
(POTS )
CEPT -
E1
Classic
4-W ire
1
Et h 3
QU A D
10 /100
Eth 1
TP
10BT
ISDN
1
Et h 4
QU A D
10/1 00
R1
R7
R2
R3
R4
ISDN Eth
ISDN
Voice Processor
(VP)
R6
Eth
SBB
4-Wire
2
SBB
SBB
C hann el C ard
Processor 2 B
Front
Pane l
10BT
Ser.
Ser.
R8
R5
MCDU #3
MCDU #2
MCDU #1
CMU #2
D
781A
Ant, IF
DLNA
HPA
ISDN
MD
Et h ernet Sw it ch 2
(ESW 2)
Et hern et
Switch 1
(ESW 1)
NIM
Eth
Et h 2
TP
10 BT
C ontrol
Proc esso r
TMS320
615
Data
Loader
Ser.
CMU #1
Audio Subsystem
Config
Straps
Read
Cct
CFDS
IRS #2
IRS #1
AES ID
DWO W
SCM
RF TxRF Rx
ISDN TE
ISDN TE
Le ge nd
Control Pr ocessor Domain
Voice Processor D omain
Data Pr ocessor Domain
C hannel C ards
Inactive/D isabled Items
DRAFT as of
4 Mar 2016