Gigabit SFP module, Multi-mode, MiniGBIC, LC interface, Up to 550/275m distance
TP-Link SG1218MPE 16 Port Gigabit POE+ Easy Smart Rackmount Switch
$314.70
TP-Link SM311LS Gigabit SFP Module Single-mode LC Interface
$22.40
TP-Link SM311LM Gigabit SFP Module Multi-mode LC Interface
Gigabit SFP module, Multi-mode, MiniGBIC, LC interface, Up to 550/275m distance

