TP-Link - SG2218P - JetStream 18-Port Gigabit Smart Switch with 16-Port PoE+, 2x Gigabit SFP Slots

TP-Link - SM311LM - Gigabit SFP module, Multi-mode, MiniGBIC, LC interface, Up to 550/275m distance

TP-Link - SM321A-2 - Gigabit Single-Mode WDM Bi-Directional SFP Module SPEC: LC Connector, TX:1550nm/RX:1310nm, Single-mode, 2 km

TP-Link - SM311LS - Gigabit SFP module, Single-mode, MiniGBIC, LC interface, Up to 10km distance

TP-Link - SM321A - 1000Base-BX WDM Bi-Directional SFP Module, LC connector, TX:1550nm/RX:1310nm, single-mode, 10km

TP-Link - SM321B - 1000Base-BX WDM Bi-Directional SFP Module, LC connector, TX:1310nm/RX:1550nm, single-mode, 10km

TP-Link - SM321B-2 - Gigabit Single-Mode WDM Bi-Directional SFP Module SPEC: LC Connector, TX:1310nm/RX:1550nm, Single-mode, 2km