10Gtek 𝟭.𝟮𝟱/𝟮.𝟱/𝟱/𝟭𝟬𝗚-𝗧 𝗦𝗙𝗣+ 𝘁𝗼 𝗥𝗝𝟰𝟱 CAT.6a Copper Transceiver, Auto-Negotiation SFP+ Ethernet Module, up to 30-Meter, for Cisco SFP-10G-T-X, Netgear and More

I inherited a Netgate XG7100 router/firewall and it has very particular requirements for transceivers. Specifically, that it doesn't support SFP+ to RJ45 devices. This device seems to work perfectly and came up immediately after install. I have been performing load testing and have seen no issues due to overheating or packet loss. EDIT: Since I originally wrote this, I have had one issue where I had to disable and re-enable the interface to bring up the connection. Not sure if the issue was this device or the ISP's ONT it is connected to. No errors were logged leading up to the issue or after the reset. As this listing on Amazon has multiple variants, it is important to note that I am referring to the "10Gtek 𝟴𝟬-𝗠𝗲𝘁𝗲𝗿 𝗟𝗢𝗪 𝗣𝗢𝗪𝗘𝗥 10GBase-T SFP+ to RJ-45 Transceiver". This is the only variant confirmed compatible with the XG7100 due to the specific chipset used in the device. The other devices use a different chipset and are most likely not compatible. This was the most cost effective and simple solution that I found to add 10gb copper to the XG7100. My other options were to get a media converter to take the handoff from the ISP, convert it back to fiber and then connect it to the router. This would have required the purchase of a media converter, two to three transceivers (depending on converter model) and a fiber cable and would be more equipment to mount on the wall. It would also require additional power. The other option would be to purchase a PCIE network adapter, which the XG7100 is also picky about. New models cost about $150, used can go for $35-$100, but it can be guessing game on whether they are reliable and will work. There still be the need to get an SFP+ to RJ45 transceiver. I found this listing referenced in the NetGate forums thread "xg7100-confirmation-if-you-can-plug-in-an-sfp-sfp-to-rj45-adapter"

Have been running these for a while at 2.5G and 10G speeds on a Ruckus switch. They run cooler than other 10G-T devices I have used from other brands. Overall they have worked well, and are a great value for the price. I did have a problem with them randomly dropping packets on connection. I contacted the manufacturer and they had no problem replacing them for me! I did some troubleshooting, and they approved the RMA. The process took less than a week to get replacements so I would certainly buy again.

Works well in both Cisco and Mikrotik switches. One of the modules was dead when I used it for the first time about 6 months after I purchased it, but customer service at 10Gtek promptly processed a warranty request and I had the new part in a few days. Overall very happy with the purchase.

Works as expected. I needed 2.5gbs and didn't realize the 10gbs ones auto negotiate down to 1gbs if you don't have a 10gbs nic. Also all the technical info shows up on the switch with these, their old ones did not (could be because I was using a 10gbs on autoed down to 1gbs?). Then I upgraded my internet to 2gbs, now I am seeing internet speeds around 2.5gbs, amazing! I have not had to do file transfers in a while, I was using a 10gb pcie card in my old pc, can't use it in this one.

Device couldn't auto negotiate to 1.25 Gbps link speed. When I tried to force the link to that speed, it wouldn't work at all. No matter what I tried, the device just stayed stuck at 10 Gbps and wouldn't auto-negotiate to proper speeds when paired to any interface at varying link speeds. This caused issues when trying to communicate with my ISP via a WAN link. There is quite a bit of overhead as well, expect to lose about 200+ Mbps on your link, even when it does work. Runs hot. Quality is average. I feel like the compatibility isn't great. It was easy to setup. It has a single port capacity. All in all, I feel like this wasn't worth the price I paid.

These do get hot which is expected, it does switch speed as it needs if your connected device does not support the highest speed. Seems to be very compatable with most SFP enabled switches.

Does get hot as description says, worked on various lengths and with older cables at 2.5G Windows on ARM driver not working or non-existent, strange as QNAP builds NASs on ARM

Working perfectly with my Ubiquity Dream Machine Pro. Automatically sensing 5 G & 10 G without any problems at half the cost of Ubiquity equipment. I’m ordering several more for all my Ubiquity equipment.

Was hunting for a 10G-T SFP and found a lot of people complaining that they run hot… stumbled across some posts that this SFP runs significantly cooler then others and I took a punt… installed in a Mikrotik switch, looked at the health of the SFP and was happily surprised that the temperature reported as 51c while xfering data at 10G speed. Highly recommended and I’m now looking to buy a few more to put in a CRS309.