ATOP 10G SFP+ LR for SDH/PDH is designed for use in 10Gigbit, multi-rate links up to 10KM of G.652 single mode fiber. Compatible with SFF-8431, SFF-8432 and supporting SONET OC-192 /SDH STM-64 and 10G Ethernet LR protocol, this product is ideally suited for telecom transmission networks and data center FAST Ethernet applications. Digital diagnostics functions are available via an I2C interface, as specified by SFF-8472.