Iridium Core 9523 – Similar to the 9522B, a modular transceiver released in 2012, designed to be an embedded solution.[buzzword] Iridium 9522B – A transceiver released in late 2008, is smaller than the 9522A and has similar features. It also supports Circuit-Switched Data (CSD), not just SBD. Iridium 9522A – Based on the 9522, some variants have built in GPS and autonomous reporting functions.