User Guide to PL131
Document Number 1155-4713 Rev E
Page 21
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This document contains confidential and proprietary information of Quake Global corporation. It may be used by recipient only for the purpose for which it was transmitted
and will be returned upon request or when no longer needed by recipient. Disclosure to unauthorized third parties or duplication without the express written permission of
Quake Global is prohibited. © 2013-2015 QUAKE GLOBAL, INC. - All rights reserved.
The maximum mobile originated message size through the Iridium network is 340
bytes. The maximum mobile terminated message size is 270 bytes.
5
Iridium network
Short Burst Data (SBD) is a service for the Iridium satellite network. The Iridium satellite network is a
world-wide, two-way, data communication system. Communications between modems and the Iridium
ground network are accomplished via a constellation of low-earth orbit (LEO) satellites. There are 66
operational satellites with additional spares that operate in 6 polar planes with pole to pole coverage at all
times.
The ground network is comprised of the System Control Segment and gateways used to connect to the
terrestrial data networks. The System Control Segment is the central management component for the
Iridium satellite network. It provides support and control services for the satellite constellation and
delivers satellite tracking data to the gateways.
Figure 5-1: Iridium network diagram
5.1
Messaging
Mobile Originated-Short Burst Data (MO-SBD)
1. The application creates the MO-SBD message in the PL131 device.
2. The application instructs the PL131 device to send the MO-SBD message to the Iridium Gateway.
3. The Iridium Gateway SBD equipment:
receives the SBD message
sends an acknowledgement to the PL131 device
establishes a DirectIP connection.
4. The message is sent to the destination server hosted by the Value Added Reseller for processing.
Note:
