MikroTik hardware questions • Re: Home use router with future thinking

Why not to FTTH?

Because it's for multi mode fiber and FTTH (or any MAN) uses single mode fiber.


And there are a few technologies for WAN fiber:

• FTTH using two fiber cores (one per direction), most often used wavelength is 1310 nm ...
• BiDi FTTH, where single fiber core carries traffic in both directions ... by using different wavelenghts. And there are a few favourite wavelength combinations (e.g. 1310/1550 nm) ... and modules on both ends of fiber have to be complementary (i.e. one 1310/1550 and the other 1550/1310).
• GPON which is a whole more complicated things due to fiber being shared medium for multiple users. Due to that, GPON operators control ONT so that user can not spy on neighbours.

And all of the above can run either over "dark fiber" or over some variant of WDM (CWDM, rarely DWDM).

So when selecting module for WAN, one has to know what the other end (ISP, GPON operator) is doing so that devices can talk to each other.

Statistics: Posted by mkx — Wed Mar 12, 2025 4:26 pm

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