We are rolling out XGS-PON everywhere which is 10G symmetric. Just because the PON runs at 10G, doesn't mean you need to provision all of your customers at 10G.
We have a range of residential packages from 150Mbps up to 1Gbps symmetric. The ONT is the same in all situations. There is no SFP cost, due to it being a copper port. If we were to offer residential packages beyond 1G, a CPE swap would be required, but there is little demand for that... yet... The future is bright for PON with NG-PON2, and 50G PON on their way. Regards, Dave On Fri, 10 Jun 2022 at 08:54, Vasilenko Eduard via NANOG <nanog@nanog.org> wrote: > I did believe that it is about the cost of SFP on the CPE/ONT side: 5$ > against 7$ makes a big difference if you multiply by 1000000. > > By the way, there are many deployments of 10G symmetric PON. It was > promoted for "Enterprise clients". > CPE cost hurts in this case. > But some CPE could be 10GE and another 1GE upstream (10G downstream) on > the same tree. > > Ed/ > -----Original Message----- > From: NANOG [mailto:nanog-bounces+vasilenko.eduard=huawei....@nanog.org] > On Behalf Of Mel Beckman > Sent: Friday, June 10, 2022 4:11 AM > To: Raymond Burkholder <r...@oneunified.net> > Cc: nanog@nanog.org > Subject: Re: Upstream bandwidth usage > > I’m not mistaken, it also depends on the optics in the splitter, given > that GPON is bidirectional single strand fiber. > > -mel via cell > > > On Jun 9, 2022, at 5:01 PM, Raymond Burkholder <r...@oneunified.net> > wrote: > > > > > > > >> On 2022-06-09 17:35, Michael Thomas wrote: > >> > >>> On 6/9/22 4:31 PM, Mel Beckman wrote: > >>> Adam, > >>> > >>> Your point on asymmetrical technologies is excellent. But you may not > be aware that residential optical fiber is also asymmetrical. For example, > GPON, the latest ITU specified PON standard, and the most widely deployed, > calls for a 2.4 Gbps downstream and a 1.25 Gbps upstream optical line rate. > >> > >> Why would they mandate such a thing? That seems like purely an operator > decision. > > > > There are also vendor issues involved. I am glad that Mel mentioned > 'optical line' rate. Which becomes a theoretical thing. If the line cards > aren't set up with buffering properly, then line rate won't be seen. And I > think the line cards can also be easily over-subscribed. Oh, and due to > the two or three step fan-out of 8/16/32, upstream becomes even more > limited. > > > > So, if you have FTTH with 1::1 house::port, then you are cooking with > fire. Else, it is the luck of the draw in terms of how conservative the > ISP is provisioning a GPON infrastructure. Which, I suppose, depends if it > is 1G or 10G GPON. >
