 The IMS, when completed, will consist of 
Data from all stations are transmitted to the CTBTO International Data Centre (IDC) in Vienna through a global private data network known as GCI, which is largely based on satellite (VSAT) links.States Parties will have equal and direct access to all IMS data, raw or processed, for verification as well as civilian uses.The Preparatory Commission has started the building and verification of the system of which as of April 2011 about 80% was operational.