Dave, [ Possibly dated information from the 2000's rollout of VERNet and AARNet ]
For <100 km (say) links, thick fibre builds and CWDM optics (one service per pair, or passive muxes) beats DWDM on skinny fibre. In a pinch, circulators can be used to get the same set of frequencies going both ways on a single core. Watch fibre cleanliness and splices, may need attenuators on short CWDM hops. Try and play in the wholesale fibre market, not the retail market. Build a thick fibre run somewhere, and pair-swap with someone to get access somewhere else. Leasing conduit, fibres or wavelengths is OK for short-term sites, otherwise higher long-term costs! Try co-operative multi-fibre build to save costs / increase coverage https://www.aarnet.edu.au/fibre-optic-sharing-in-regional-australia-to-create-opportunities But be careful about who owns/controls the resulting infrastructure; get an IRU :-( For fibre resilience, build hierarchical dual-attached rings. (Neil Clarke VERNnet design) CoreA <-> Hub1 <-> Hub2 <-> CoreB ; Hub1 <-> Site1 <-> Site2 ... <-> Hub2 add more hub rings from the core; and more site rings from each hub pair. Also helps differentiate between a broken link vs. no power at a remote site. And finally, look out for environmental factors like mice eating fibre termination epoxy. https://users.monash.edu.au/~ralphk/murine-network-engineer-03062009.jpg from Ralph Klimek https://users.monash.edu.au/~ralphk/more3.html Thanks, John On Thu, 30 Mar 2023 at 02:49, Dave Taht <[email protected]> wrote: > I am doing an AMA friday, in part about the $70B dollar USA NTIA > broadband and BEAD programs, which are largely targetted at improving > rural access to the internet. The target audience is one with which I > am mostly unfamiliar, the directors of the 50 US states administering > these programs. > > I am very interested about what y'all have learned about how to roll > out fiber and fixed wireless right, in your country, so far, and what > could be done better, in mine. > > Please let me know what you think here, (links to studies would be > great, too) > > and/or come heckle! > > -- > AMA March 31: https://www.broadband.io/c/broadband-grant-events/dave-taht > Dave Täht CEO, TekLibre, LLC > _______________________________________________ > AusNOG mailing list > [email protected] > https://lists.ausnog.net/mailman/listinfo/ausnog >
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