L3 Technologies AFIRS228S0 ユーザーズマニュアル
AVIATION RECORDERS
COMPONENT MAINTENANCE MANUAL
AIRBUS IRIDIUM SATCOM SYSTEM
DESCRIPTION AND OPERATION
1. SYSTEM OVERVIEW
Refer to Figure 1. The Airbus Iridium SATCOM System comprises a portion of the aircraft
avionics, or “Aircraft Earth Station” (AES) required to support the "Next Generation
Satellite System" (NGSS) using the Iridium Satellite System as specified in RTCA/DO-
262A.
avionics, or “Aircraft Earth Station” (AES) required to support the "Next Generation
Satellite System" (NGSS) using the Iridium Satellite System as specified in RTCA/DO-
262A.
This system serves as the radio transceiver that provides RF path connectivity with the
satellite(s), and provides the digital data (ISDM) and/or analog voice and/or digital voice
interfaces (ISVM) with other aircraft user subsystems. Its primary functions are: modulation
and demodulation of transmitted and received signals, respectively, signaling and protocol
interactions with corresponding satellites, channel management, and switching and
interconnections with the aircraft and their attached avionics.
satellite(s), and provides the digital data (ISDM) and/or analog voice and/or digital voice
interfaces (ISVM) with other aircraft user subsystems. Its primary functions are: modulation
and demodulation of transmitted and received signals, respectively, signaling and protocol
interactions with corresponding satellites, channel management, and switching and
interconnections with the aircraft and their attached avionics.
The Airbus Iridium SATCOM System provides multiple voice and data communications
functions in the aircraft. The Automated Flight Information Reporting System (AFIRS)
provides a satellite voice and data communications (SATCOM) link with the Public
Switched Telephone Network (PSTN) via the Iridium
functions in the aircraft. The Automated Flight Information Reporting System (AFIRS)
provides a satellite voice and data communications (SATCOM) link with the Public
Switched Telephone Network (PSTN) via the Iridium
®
satellite network. The system uses a
standard ARINC 741/761 SATCOM interface to the flight crew’s Audio Integrating System
and ARINC 739A Multi-Purpose Control and Display Units (MCDUs) in the cockpit, as well
as providing 3-extension Public Branch Exchange (PBX) capability for up to 2 handsets in
the cabin.
and ARINC 739A Multi-Purpose Control and Display Units (MCDUs) in the cockpit, as well
as providing 3-extension Public Branch Exchange (PBX) capability for up to 2 handsets in
the cabin.
Airbus Irridium
SATCOM System
Operational
User
Maintenance
User
External Aircraft
Systems
Iridium Space
Segment
GPS Space
Segment
Figure 1. Airbus Iridium SATCOM System Operational Concept
Description and Operation
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Jan. 21/14
23-28-01