The next question was which PON technology to go with. Right now, APON, EPON, GPON, and GEPON are all out there. We ruled out the first two right away since they're outdated and just can't keep up with what users need today. That left us choosing between GPON and GEPON. Both technologies have plenty of manufacturers, but here’s the catch: their gear isn’t compatible with each other, even within the same technology. And it makes sense—who wants to pour money into R&D just for everyone else to ride their coattails and let low-cost copycats win the price war? This way, vendors lock you into their ecosystem. From a tech standpoint, it’s way smarter to stock spares from just one manufacturer rather than managing a whole zoo of different brands just in case something breaks. An N+1 redundancy setup is always going to be cheaper than 1+1 anyway. So, picking a manufacturer pretty much ties your company down to them for the long haul and leaves you dependent on them.
Either way, buying an expensive solution from big-name vendors completely in the dark felt pretty sketchy. We were looking for pretty much the cheapest option available. On top of that, for the pilot launch, we needed an all-in-one box, not a modular system. Some manufacturers don't even make 1U OLTs (Optical Line Terminals), only modular chassis. That immediately knocked them off our list because we have a limited number of fibers running from our central hub to the remote node serving the residential area, and every single fiber counts.
Anyway, we narrowed down the list of available manufacturers, and the price of customer premises equipment (CPE) was roughly the same across the board.
The only question left on the table was: GPON or GEPON?
Either way, buying an expensive solution from big-name vendors completely in the dark felt pretty sketchy. We were looking for pretty much the cheapest option available. On top of that, for the pilot launch, we needed an all-in-one box, not a modular system. Some manufacturers don't even make 1U OLTs (Optical Line Terminals), only modular chassis. That immediately knocked them off our list because we have a limited number of fibers running from our central hub to the remote node serving the residential area, and every single fiber counts.
Anyway, we narrowed down the list of available manufacturers, and the price of customer premises equipment (CPE) was roughly the same across the board.
The only question left on the table was: GPON or GEPON?
This article is a translation of the original Russian-language post.My journey of learning GPON
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