[Bloat] [Starlink] On fiber as critical infrastructure w/Comcast chat

Robert McMahon rjmcmahon at rjmcmahon.com
Sat Mar 25 20:50:25 EDT 2023

Our building is 100 meters from multiple fallow strands. I've got the kmz map from the dark fiber guys.

The juniper switch was designed in 2012 and used old mfg processes, not sure the nanometers but likely 28. Newer ASICS improve power per bit per distance dramatically simply by using current foundries 5nm on the way to 3nm. Then on top of that there is a lot of NRE to further reduce power. That's why a 100Gb/s without gear boxes can run at 1W for all parts, serdes, laser etc and at distance. Not 5kW like a tower.

2g to 6g really adds nothing.  My point was to see how flexible they were in optics per a customer ask. I suspect both use 10g and rate limiting. 10G optic parts are a decade old now. No improvements coming in 10G. Kinda like buying one of the last incandescent bulbs. Best to go led if possible.

FiWi connected via 100Gb/s is the answer for the next ten years. The last mile providers will figure it out if given quality information and if they ask the right questions and demand the optimal metrics be used. They may have fallen victims to their own marketing. Hard to know from the outside. 


On Mar 25, 2023, 5:07 PM, at 5:07 PM, Nathan Owens <nathan at nathan.io> wrote:
>Comcast's 6Gbps service is a niche product with probably <1000
>It requires knowledge and persistence from the customer to actually get
>installed, a process that can take many months (It's basically MetroE).
>requires you to be within 1760ft of available fiber, with some limit on
>install cost if trenching is required. In some cases, you may be able
>trench yourself, or cover some of the costs (usually thousands to tens
>On Sat, Mar 25, 2023 at 5:04 PM Robert McMahon via Bloat <
>bloat at lists.bufferbloat.net> wrote:
>> The primary cost is the optics. That's why they're p in sfp and pay
>> Bob
>> On Mar 25, 2023, at 4:35 PM, David Lang <david at lang.hm> wrote:
>>> On Sat, 25 Mar 2023, Robert McMahon via Bloat wrote:
>>>  The fiber has basically infinite capacity.
>>> in theory, but once you start aggregating it and having to pay for
>>> that can handle the rates, your 'infinite capaicty' starts to run
>out really
>>> fast.
>>> David Lang
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