[milankragujevic]

That is not a common scenario, most people in the world get an ONT with an integrated ONU. For example Huawei HG8245Q2. So in your case obviously you can just plug in any router. But a lot of people get it all in one device. And most ISPs don't let you choose what CPE you get.

[msh]

Do you have data to support that statement?

[milankragujevic]

Yes, in fact I do! My whole country!

(and other countries on the Balkans, it's all Huawei all-in-one GPON CPE everywhere!)

[msh]

That's hardly data to talk about most people in the world.

[milankragujevic]

I'm sorry if I said something controversial, I can take a look and send you relevant info, but for now please take a look at:

Telekom Srbija (Serbia)

SBB (Serbia)

Orion telekom (Serbia)

Supernova (Serbia)

A1 Slovenia

Telekom Slovenije (Slovenia)

Telemach (Slovenia)

A1 HR (Croatia)

Telemach (Croatia)

T-Com (Croatia)

Iskon (Croatia)

Telekom Srpske (Bosnia and Herzegovina)

Telemach (Bosnia and Herzegovina)

Triontel (Bosnia and Herzegovina)

Mtel (Montenegro)

T-Com (Montenegro)

T-Com (North Macedonia)

A1 (North Macedonia)

... and similar in Bulgaria

On all relevant websites, you cannot find info on BYO, and I can personally guarantee you cannot use your device on GPON or DOCSIS networks.

Only Romania is an exception.