Iridium, Deutsche Telekom IoT, and Toyota Demonstrate Voice Messaging over Satellite via Iridium NTN Direct

Iridium, Deutsche Telekom IoT, and Toyota transmitted the first standards-based NB-IoT voice message over Iridium's fully operational LEO satellite constellation via Iridium NTN Direct at Telekom Satellite Day 2026. The demonstration followed completion of technical integration and a global roaming agreement that will let eligible Deutsche Telekom IoT customers roam between terrestrial networks and Iridium satellites on compatible NB-IoT devices. The message originated from a Toyota vehicle using a Nordic Semiconductor nRF9151 development board and Fraunhofer's AI-based NESC Voice Codec, which delivers satellite voice at bitrates of 1 kb/s or less.

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