The manufacturer FirstFiber Technologies help customers create their own OTDRs with their OTDR core processing coding and powerful hardware design ability. They also sell their own OTDRs, the top 6 are listed as following, FF-980REV (Mini Pro, 9-in-1) FF-980EXP (All-in-1, 12-in-1) FF-980MAS (Enhanced OTDR, 12-in-1) FF-980EXT (new Enhanced OTDR, 9-in-1) 8000MAX (High Accurate OTDR) 990PRO