... 3 years warranty 2) multimode or single mode,single fiber or dual fiber 3) certificate of FCC,CE,RoHS 4) transmit 0 ... certification. They work in two different twisted pair and fiber optic transmission media conversion, relay 10/100Base-TX and 100Base-FX ... transmission 5. Supply the optical fiber transmission of dual-fiber multi-mode, dual-fiber signal-mode and single-fiber single-mode. 6. External ...