The Iridium Extreme PTT already gives you voice. With N-Anywhere, its reported positions become tracks on a map your organization can see. When someone enters a weather warning or disaster alert area, the platform sends a message to that phone on its own. Alert messages are available in English only for now; a Chinese version will follow.
The same Iridium 9704 Launch Pad running N3D firmware, built with IMT CC: it starts on its own, retries failed sends, keeps pending messages through a power loss and receives files over 100 KB. Iridium certification in preparation; not yet for sale.
Whether your devices are SBD 9602, SBD 9603, SBD 9604 or IMT 9704, you can now send and receive messages through N3D’s satellite integration platforms: SBD CC for SBD devices and IMT CC for IMT devices, each with a web console and an API.
Build your firmware first, without building a server first. Once N3D's 9704 devices are Iridium-certified and on sale, the IMT CC monthly fee is waived for the first two months on each device.