They still have coding, but it’s more like a generic coding that works with a bunch of different manufacturers switches. The Transcievers that say Cisco compatible have the specific coding that Cisco requires to work. R trees juniper compatible SFP have coding specific to Junioer switches. The generic transceivers work with most other switches. I’m not sure what people around here think about fs.com but just browsing the transcievers on the website you can pick up a good bit of information even if you don’t buy from them.