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Table Of Contents
Introduction
1. Illustration of Equipment
2. Acronyms and Abbreviations
3. Safety Advisories
System Description
1. Inmarsat System Overview
2. Equipment Overview
A. SDU
B. SCM
3. Equipment Specifications
4. System Interfaces
A. SDU
B. SCM
5. User Interfaces
A. TCP
B. 4-Wire Audio
C. Ethernet
D. Maintenance Port
E. LEDs
F. Self-Test Button
6. Software Description
System Operation
1. Registering and Activating Terminals
A. Obtaining System Addresses
B. Choosing Service Providers
C. Registering Terminals
2. Using the A781-500 System
A. Operating the TCP
B. Logging On and Off
C. Accepting and Making Calls in the Cockpit
D. Viewing BITE Information
3. Channel Status and System Configuration
A. SBB Status
B. Channel Information and Bit Errors
C. System Part Numbers
4. Maintenance Mode
G. Configuring Audio Options
Testing and Fault Isolation
1. Operational and Diagnostic Testing
A. General
B. Test and Fault Isolation Equipment Requirements
C. SDU Maintenance Port Utility
D. Operational and Diagnostic Test Procedures
2. Troubleshooting and Fault Isolation
A. Subsystem Health
B. SATCOM System Bus
C. Thermal Status
D. SCM Health
E. Subsystem Bus Status
F. RF Path Status
G. USIM and Data Bus Status
H. ORT
I. Contact Product Support
3. Adjustment/Alignment Procedures
4. Modification History
Maintenance and Repair
1. Maintenance
2. Repair
3. Instructions for Continued Airworthiness
A. Airworthiness Limitations
B. Electrical and Mechanical Inspection and Check
C. Instructions for Continued Airworthiness
4. Visual Inspection and Check
Appendix A: Return Material Authorization
1. Warranty Returns
2. Non-Warranty Returns
3. Repackaging Requirements
4. RMA Procedure
DRAFT
System Description, Ins
t
allation, and Maint
enance Manual
ARINC 781-500 SDU and SCM
3-16
17 Mar 2016
23-15-87
© Honeywell International Inc. Do not co
py without express permission of Honeywell.
Blank Page
DRAFT as of
4 Mar 2016
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