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2 Product Overview
The Iridium Edge is a finished satellite device with a power supply and antenna in an environmentally
sealed enclosure. It contains an Iridium Short Burst Data (SBD) modem which allows remote devices to
send and receive satellite messages from anywhere in the world. Iridium SBD service has two message
size classes. The larger message class supports message sizes up to 1960 and 1890 bytes for Mobile
Originated and Mobile Terminated messages respectively. The Iridium Edge uses the smaller size
message class which supports satellite messages of size 340 bytes for a Mobile Originated message and
270 bytes for a Mobile Terminated message. As per the figure below, all satellite messages are routed
through Iridium’s Gateway which provides a secure internet connection to an Application Host server,
which is typically designed for a specific application or vertical market.
Figure 2-1 Iridium Edge Overview
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