95
points
matt-p
Joined 1,189 karma
- I’m speaking mainly within the context of telecom field splicing - the numbers I mentioned are typical for that application in my experience. You’re only sending on the order of 5 mW down a fiber, so none of those high-power concerns apply. Obviously, different networks have different thresholds: if you’re building a greenfield, low-latency long-haul route, you want to minimize loss and it’s reasonable to spend the extra time and use higher-end equipment. For FTTH, with something like a 30 dB overall budget, nobody really cares whether a splice is 0.03 dB or 0.1 dB.
- That is probably the very best case scenario, but possible yes. Typically you'd accept anything less than 0.1dB.
- Of course, but a splitter in a PON network or a WDM device are perhaps better examples of things that are hacky to model. Multi-fibre cables and splices are another. Netbox is great for some simple applications, and it's fantastic OSS, but in practice falls short for many use cases.
- Thanks! Sorry, looks like I made the repo private at some point I'll take a look later but for now I've fixed the link.
- Definitely mesmerising the first time! We have ribbon fibre these days as well which is very cool too.
Thank you :)
- 4 points
- 160ms is essentially optimal and you can get down to about 200ms AFAIK.
- 2,3 and 4 android can do. 1 is very fair but could be achieved with an old phone, maybe with a rubbish battery plugged in.
- This is a really fair example.
- I think every single pixel I've ever had could share wifi or 4g/5g.
- I never really understand why you'd rather have one of these over just enabling "hotspot" on your phone. Ethernet is the only reason I can think of
- Vast majority of the civil service is outside of London these days, I suspect disproportionally so.
BBC similarly, spends the vast majority of it's money outside London. If you were from anywhere near Manchester, Glasgow or Liverpool you'd know that perfectly well.
I'm afraid governments have actually done genuine work to try and reduce dependence on London to not very much avail. Network effects rule again, why is twitter (X) bigger and more popular than blusky or whatever?
- You are basically spot on. Thermal expansion (primarily) but you need it to be evenly spread for lots of boring reasons like as you mentioned axial force reduction, fatigue life, anchor load limits and so on. These tunnels just use forced air to cool the (XPLE) cables so they're not oil filled or anything. Tunnels are basically all thermally constrained.
- Totally insane! Thus far I have been fortunate to be buying pre-price crunch stock but I don't think it's going to last much longer. Really wouldn't want to be buying in 3 months time.
- TLDR; now is probably a great time to buy if you have needs for Q1-Q2
Sorry! In practice manual usage is normally very rare, these are typically auto generated!