Just had a look at the Web-Interface of the TL-SG3210 attached to the other end of the fiber. The TL-SG3210 does NOT indicate, that the SFP is connected! (non-green within web-interface) However: the...

Model : Hardware Version : Firmware Version : ISP : I had two TP-Link switches connected via SFP-Modules (Ethernet) TL-SG3109 TL-SG3210 which worked fine for many months. Today I replaced the old...