This INTEGER value identifies which specific software image the table row describes, chosen from an enumerated list of roughly two dozen image types such as bootstrap, cpmSwitch, tsmECF, or a line-card image like ds3Green. Because this object also serves as the INDEX into stnSwVersionTable, an admin polling the table relies on it to tell which board or image role (an operational CPM, a tunnel switching module, a recovery image, and so on) each set of version numbers belongs to. For example, a row with stnSwImage set to cpmSwitchRecv(5) is reporting the version of the Central Processor Module's recovery image rather than its normal operational image.