This product is either discontinued or we cannot get that from suppliers.
DDM: Yes, SFP-MSA: Yes, Hot Swappable: Yes, Standards and Protocols: IEEE 802.3z, TCP/IP, Wave Length: Tx: 1310 nm; Rx: 1550 nm, Power Supply: 3.3V, Safety & Emission: FCC, CE, Cabel: Single-Mode Fiber, Fiber Type: 9/125 m Single-Mode, Max. Cable Length: 10 KM, Data Rate: 1.25 Gbps, Port Type: LC Simplex.
TP-Link's TL-SM321B-2 is used for short-and medium distance fiber network in practice, and it provides fast and stable gigabit fiber connection for switches, routers, servers, etc.