
Iridium Circuit Switched Data (CSD)
Asynchronous, Circuit-Switched, Bi-Directional
An asynchronous, circuit-switched, 2400bps, bi-directional service that allows for dial-up services. It can be used for larger amounts of data, including files of dozens or hundreds of megabytes.
Iridium Circuit Switched Data (CSD)
Asynchronous, Circuit-Switched, Bi-Directional
An asynchronous, circuit-switched, 2400bps, bi-directional service that allows for dial-up services. It can be used for larger amounts of data, including files of dozens or hundreds of megabytes.
Real Time, Simultaneous Connections
Ideal for applications where a limited number of field devices need to send their data a few times per day, or where the user, from a central location, reaches out to the field applications to retrieve their data.
- Global Availability
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A mesh of 66 active Low-Earth Orbit Iridium satellites blankets the Earth, providing reliable coverage from pole-to-pole
- Two-Way Connectivity
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Gain insights and send over-the-air commands for business operations and remote assets anywhere in the world
- Real-Time
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Iridium’s LEO network enables low-latency connections through shorter transmission paths than GEO networks
- Range of Module Options
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Small, light-weight, low-power, and low cost options to deliver Iridium CSD through your custom solutions
- Simultaneous Connections
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Similar to placing a phone call, CSD uses circuit-switching tech via a dial‐up modem & ISDN for low‐bandwidth data transfer, to enable a host application to originate/terminate numerous connections

Related Case Studies
Related Case Studies
One of Jeff’s recent expeditions took him and his team on a course through the Arctic, where only Iridium could provide the coverage and connectivity to stay in touch. Using the Iridium Edge® Solar, his followers tracked his team’s expedition in real time from start to finish.
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Resources
Case Study concerning Iridium's Polar Research Solutions
The Iridium Fair Access Policy applies to all Iridium Services
Dated: August 08, 2018