@Somnus Thanks for your reply - they're 1Gb, just generic brand off Amazon. When I connect SFP to a PoE port on the other switch they do link up at 1Gb. Interestingly, if I plug a computer directly...

I've got a TL-SG3452P and a TL-SG2210MP to run a CCTV system. I need all the built-in PoE ports for cameras so I installed gigabit copper adapters in the SFP ports to interconnect the switches (cat6...