Naming conventions: Product_type_h/wRevision_s/wRevision_ValidArea_language_datecode.extension Product_Howto_language_ Theme-with-description.extension DES-1228P_fw_revALL_12012_ALL_en_071126.zip Firmware 1.20.12 DES-1228P_fw_revA1A2_13101_ALL_en_081215.zip Firmware 1.31.01