Hi Phil, @PhilipDAth is correct that Meraki only supports passive twinax cables at this time, and only makes (and officially supports) the 1m and 3m passive twinax cables, MA-CBL-TA-1/3M. However Meraki does not lock out non-Meraki optics modules, so in the wild there are cases where other non-Meraki SFP/SFP+ modules are in use. I've certainly seen Meraki switches running non-Meraki optics, no special setting and no Support case required. I have a couple of stacked MS350 switches in my own lab doing 20G cross stack link agg to a 3rd switch using 1 foot Cisco twinax cables, which I don't think is an official Cisco part/cable, they're not even in the Cisco GPL (you just cannot get/find SFP-H10GB-CU1F 1-foot twinax cables) and they certainly aren't Meraki parts, and it works just fine. That said, I'm not going to promise the Cisco SFP-H10GB-CU5M (5 meter) twinax cable is or isn't going to work, but give it a shot and be pleasantly surprised. While you likely couldn't use the 7 or 10m AOC parts, you could perhaps stretch that 3m to 5m with a Cisco SFP-H10GB-CU5M.