User's Guide
Table Of Contents
- Introduction
- System Description
- System Operation
- Testing and Fault Isolation
- Maintenance and Repair
- Appendix A: Return Material Authorization
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SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL
ARINC 781-500 SDU and SCM
© Honeywell International Inc. Do not copy without express permission of Honeywell.
SYSTEM DESCRIPTION
This section includes basic information about the A781-500 system, including the following sections:
• Inmarsat System Overview
• Equipment Overview
• Equipment Specifications
• System Interfaces
• User Interfaces
• Software Description.
1. Inmarsat System Overview
This section provides an overview of the Inmarsat satellite communications system and networks.
Satellite communication systems provide users with long-range voice and data communication by
accessing global satellite and ground communications networks. Satellite communication systems
include global satellite networks, Land Earth Stations (LES), Ground Earth Stations (GES), Aircraft Earth
Stations (AES), and Mobile Earth Stations (MES).
The LES/GES is the part of the satellite communication system that is on the ground. These numerous,
international stations are responsible for routing voice and data calls from the MES/AES to their
destinations around the world. The MES/AES is the part of the satellite communication system that is on
the aircraft. GES and AES are the terms associated with Aero-H+ services. LES and MES are the terms
associated with other satellite communication services.
Inmarsat is an international organization that operates and maintains multiple geostationary satellites and
satellite networks (I-3 and I-4). For more information about I-3 and I-4 satellite beam coverage, refer to
the Inmarsat website—www.inmarsat.com.
I-3 satellites provide Inmarsat services for aviation (Aero H+ and Swift 64), shipping, and land-mobile
users. The satellites connect to ground telecommunication systems through a network of GESs. Each I-3
satellite is located over an Ocean Region (OR)—the current OR names are:
• Atlantic Ocean Region-East (AOR-E)
• Atlantic Ocean Region-West (AOR-W)
• Indian Ocean Region (IOR)
• Pacific Ocean Region (POR).
I-4 satellites provide worldwide SwiftBroadband (SBB service). Each I-4 satellite has 19 wide spot beams,
228 narrow spot beams, and is capable of accommodating many separate, simultaneous SBB sessions.
The SBB service and I-4 satellites support broadband applications. The current I-4 satellites are:
• AMERICAS
• EMEA (Europe, Middle East, and Africa)
• APAC (Asia-Pacific).
DRAFT as of
4 Mar 2016