Circuit Switched Data


  • Iridium’s original asynchronous, circuit-switched, bidirectional voice and data service
  • Dial-up data transmission via Iridium’s low-Earth orbit (LEO) network
  • Ideal for low-bandwidth critical applications

Key Features

Like a telephone line, Iridium CSD creates a continuous, point-to-point data connection. It suits applications where field devices periodically send data, or when a central system retrieves data on demand.

Simultaneous Connections

Iridium® uses circuit-switching technology via a dial‐up modem and integrated services digital network (ISDN) for low‐bandwidth data transfer, enabling a host application to originate or terminate numerous connections.

Easy Integration

Small, lightweight, and low-cost options deliver Iridium CSD through custom solutions.

Use Cases

Telemetry, email/small file transfer, backup communications.

Related Developer Technology

Iridium Core 9523

Small but powerful, the Iridium Core 9523 modules support all Iridium narrowband voice and data services to enable endless global connectivity possibilities.

Iridium Core 9523