10/100/1000Base-T

I've bought a ton of these, never have issues. I install them in juniper and cisco.

Compatible and works well with Cisco 9300 series switches. ease of installation

I purchased a total 7 of these units to support network camera installations at my wife's small retail business and at my home. For these installs, I had purchased 4 TP Link Smart Switches; and each switch unit had 8 POE ports plus 2 SFP slots. I used 6 of these Gtek SFP RJ45 Transceivers to connect 3 of the TP Link switches together in a serial manner to support a 24 network IP camera deployment at the retail business. The last Gtek transceiver will be used in the remaining TP-Link switch in my home network IP camera install. These Gtek transceivers work quite well, and they allow you to create one or two extra Ethernet ports on your network switches that have one or two SFP slots. Instead of the SFP slots using an optical fiber to ethernet transceiver, you simply plug and play one of these Gtek RJ45 transceivers, and you now have an extra Ethernet port. A very handy approach in many computer network installs.

I got a couple of these to test, and I don't see any difference between them and Cisco's own transceivers. So you can get the same functionality at a much lower cost by using these. The only hiccup I had was that I had to modify my config to get around Cisco trying to block third-party transceivers. I added the following commands in global config mode: service unsupported-transceiver no errdisable detect cause gbic-invalid Then they started working. You'll probably get warnings the first time you add those commands. Cisco cannot void the warranty on your switch for using these, no matter what they say. At any rate, they work great and they're cheap, so I'll be buying more of these the next time I need transceivers.

UPDATE: I returned this particular SFP Module and ended up buying a fiber version that, with updated firmware on the router, worked great. The real story here is the customer service. They reached out to me trying to troubleshoot with actual helpful ideas. Impressed. Updated review to 5 stars. Not sure if I made the mistake or it's a product problem but it is not compatible with a Cisco C8200L-1N-4T

HA! This works just as good as Cisco's own brand at a FRACTION of the price. What a great way to save a ton on a needed piece of router gear.

I’ve got refurbished Cisco copper SFPs and this SFP. This one works just as well as Cisco at a fraction of the cost. Save your money, and get what you pay for. This is a solid piece of equipment.

Decent quality, works well, no heating apparent.