If you have some sort of FTTP, what is the ONT / ONU hardware that you have?
Do Openreach users have PONs?
If someone does, they need the ONT to run the PON protocol, to split apart, decrypt the broadcast downstream and handle the time slots in the TDMA for the upstream, so there’s quite a lot in it.
Has anyone seen anything about the optical-to electrical very lowest interface layer and the PHY protocol layer if any immediately above it? I’m wondering about coding (or any possible modulation ?) on the wavelength(s) and I realise I don’t know the first thing about it.
Has anyone got straight optical link, ie without any PON-style sharing/broadcast/splitting/TDMA, so that you get the full capacity in both directions?
What about B4RN NICs? I know that you get the full 900Mbps upstream as well as downstream with B4xx, but I don’t know about any sharing with neighbours, at the optical level or in ethernet domains or wherever.
I’m amazed at how little I know about this so any links would be good.
What exactly do we call the types of optical access interfaces, direct or PON or whatever, and the nomenclature for types of PON if different variants are around. And what does one call the different types of ONT?
If I were ever lucky enough to get an optical interface, then I would want to put a serious lightning surge protector on the ONT’s mains and put it on its own huge UPS. I would also really want to try and beg a spare ONT (not for free) as well, in case it went belly up for any reason.
I realise that they have batteries in them. With a spare ONT, perhaps a UPS would be overkill, apart from its own anti-surge properties. I do of course realise that there is a dramatic reduction in lighting risk because there’s no longer any possibility of damage through the network, but my mains is still vulnerable of course. I wouldn’t need to worry about GPR/EPR anymore.