Fire Detection & Suppression SDS IDX adopts VESDA (air-sampling very early smoke detection apparatus) system with smoke and fire temperature detecting system all over the hosting room to ensure the timely detection of hidden fire risk to take prompt measures against the occurrence of any fire accident with the ultimate purpose of safeguarding the security and reliability of customer equipment and data. View Big Picture Hosting room adopts IG541 (Inergen) gas extinguishing system with fire prevention system possessing the alarm function. It should be examined and approved by local fire bureau.