Teridian is a leader in coaxial Line Interface Units (LIUs) for PDH and SONET/SDH WAN interfaces ranging from 34.368 Mbps to 155.52 Mbps. With a large installed base and a dedication to high performance mixed-signal solutions, Teridian LIUs are key building blocks used throughout today's optical WAN infrastructure. For example, Teridian's STM1 SFP module is used in a wide range of Tier 1 platforms of the world's leading OEMs.