I am mainly used to the enterprise where most connections are deployed by some "normal" kind of fiber eg SFP+, QSFP+, SFP28, QSFP28 and those modules are almost fool proof, run cool and are reliable.  Like most normal admin users, I like to use my own hardware for routing and switching rather than the often poor equipment provided by the ISP, especially when you have enterprise hardware that will be more reliable.

The normal path is that you would just take the fiber optic link on an SFP or SFP+ and plug it in directly into your firewall, router or switch, cutting out the extra power usage, insecure ISP devices and another point of failure.  

But enter the situation with a lot of home and office connections and anything on ISPs like Telus, AT&T, most ISPs in Japan etc... that are faster than 1.5G, they no longer use the standard GPON which just registers via the serial# of the module that the ISP has on file.

Now you need a device called the NAH (Network Access Hub) which uses XGSPON which is authenticated via this extra and unnecessary device/NAH.  Plugging in an XGSPON SFP+ module to your router/switch will not work like a normal GPON.

Solution 1 - buy an expensive XGSPON module and hack and modify it

There are some solutions which modify XGSPON modules from fs.com so you can use it as normal, but they are pricey and this can be risky if the authentication mode/details changes in the future.  In plain English, you could be away from home and need access to your home network but an ISP Update could render your internet access useless.  Here is the procedure on Github to hack the XGSPON SFP+ module from fs.com.

Solution 2 - Use the NAH and use an SFP+ to RJ45 module

As much as I hate the NAH, this is the most reliable way for the reasons mentioned in #1.

One module I recently tested has an ID of "SFP+-10G-SR" and runs at a reasonable 51C which is much better than what many users report with other modules (eg. burning hot 80-90C).  I cannot be certain if the unit runs cool because of the design it claims to use which minimizes heat, or if it is because my enterprise switch has active cooling.

Here is the affiliate link to the actual exact SFP+ to RJ45 item I bought.

Even when pushing 3Gigabit in both directions the module stayed at the same temp or maybe went to 52C.

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