Modul TP-Link, TL-SM321B-2 1000Base-BX WDM Bi-Directional SFP, Standarde si Protocoale: IEEE 802.3z, TCP IP, Lungime de Unda: Tx: 1310 nm, Rx: 1550 nm, Lungime maxima a cablului: 2km, Data Rate: 1.25