Roger G

Question, according to this treat, Swisscom uses PON with 1:64 splitters and the splitters are probably now very often also installed in the control centre, because of the 2P2 design according to the specification. If everyone on a PON tree shares 10Gb/s up and down, that doesn’t leave much bandwidth per user. I realise that it is very often the case that not all 64 users (provided all 64 ports are occupied) are online or require a lot of bandwidth. However, I think that there are still bottlenecks and a certain amount of overbooking. Connecting the PONS to the backbone is certainly no longer a problem these days, there is certainly enough capacity available.

How are bottlenecks resolved, are additional PON ports connected and customers moved to another PON port?

Another question regarding PON. Does or will Swisscom also use WDM-PON? I know about 25PON or 50 PON, but I don’t know what impact this has on the available bandwidth on the individual PON port.

Greetings Tom

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      Tom_40 These are optical splitters. The market is moving towards NG-PON2 (also known as TWDM-PON). Mainly for the advanced network capabilities, less for the pure speed.

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        user109

        No, you didn’t, the link contains the year, it was previously about what doesn’t come after XGS PON, I just came across this link again.

        What was once tested…..

        You know yourself how few users effectively utilise the 10GB…..

        Greetings Lorenz

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            Lori-77 yes exactly and the way Fredy does it is just too expensive (port costs per customer) for Swisscom on a large scale. 100 Gbit/s would easily be possible.
            There are already 500 Gbit/s backbone lines in the data centre.

            @Tom_40 see here: **XGS-PON fibre: How does rationing work?

            https://community.swisscom.ch/d/772106-xgs-pon-glasfaser-wie-funktioniert-die-rationierung

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                user109

                Thanks for the info and the link, I know this entry. However, it does not show how to react if rationing alone is not sufficient and a PON tree is really utilised over a longer period of time. The backbone is then not the problem as the PON tree is probably connected via a 100G/bits link.

                Greetings Tom

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                    Tom_40 no 2× 10 Gbit/s if it is overloaded then just =< 1 Gbit/s.

                    With power users, you keep a close eye on what’s going on and intervene with fair use conditions if necessary.
                    e.g. leased line connections, home web hosting, etc. are prohibited with a RES subscription.

                    Otherwise you just expand, as was done with the PUS.

                    But let’s be honest, I’ve been monitoring my bandwidth for several years now and average about 30Mbit/s per year and have a 10Gbit/s XGSPON connection with subscription L.

                    The Internet is not yet ready for 10 Gbit/s, only with a sciatic grip for a few K a month, e.g. AWS
                    The maximum was 2 Gbit/s, but that’s a rarity on average around 500 Mbit/s

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                        user109

                        Thank you, I am interested in PON and the design of this network technology, hence the question. There are Youtube videos about it on the internet. But not how bottlenecks are counteracted or reacted to.

                        I currently have fibre optic and the M subscription and this is completely sufficient. Yes, the internet is definitely lagging behind the bandwidths available now.

                        Greetings
                        Thomas

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