Psiber LanMaster 25 LM25 Lan Network Link Verifier is designed to rapidly test Fast Ethernet (100baseTX) and Standard Ethernet (10baseT) links. The Psiber LanMaster 25 LM25 features auto-sensing, auto-negotiation, full duplex, display of exact configuration and signal type of the equipment connected to the Link, verifies Link connectivity to the far end, checks for reported faults, identifies polarity of the outlet or cable, and identifies a connected port by transmitting a Link Signal.