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Kazumara @ Kazumara @discuss.tchncs.de
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1 yr. ago

China is quietly pushing ahead with massive 50,000Mbps broadband rollout to leapfrog rest of the world on internet speeds

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  • I'm working on long range stuff so I'm not so familiar with PON specifically. Maybe I made some bad assumptions. Stable at -30 dBm receive sounds really impressive.

    The one I was talking about is this, with 18.5 dB total budget, that is, min +4.5 dBm transmit, and min -14 dBm receive. This one is built with an APD.

    In my kind of application, without splitter, this will get you about 30-40 km. We've got one of a slightly older type with 18 dB budget running between Fribourg and Bern for example.

    I realize that PON stuff is quite different with the time slitting and I think wavelenght splitting too, at least in XGS-PON, but I was thinking the pure laser and diode physics would need to be the same.

    For -25 dBm minimum the most similar of the ones we currently have would be this one which manages -26.9 dBm and is one of the ones with a SOA built in, or for the 10G stuff this one, which manages min -23 dBm but with only an APD and no SOA.

    I'm thinking their 50G stuff must be closer to 100G than 10G transceiver design. So I wonder if they manage to make it without SOA.

    • Ocasio-Cortez says if you feel burnt out by the news lately, that’s ‘exactly’ what Trump wants

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    • China is quietly pushing ahead with massive 50,000Mbps broadband rollout to leapfrog rest of the world on internet speeds

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  • I wonder if they use semiconductor optical amplifiers in the receivers, or if they can make do with avalanche photodiodes.

    The 100G stuff I'm looking at has 18.5 dB budget with APDs, that seems rough considering you want a few kilometers of fiber, a few splices and a few connectors (probably LC/APC) as well.

    • China is quietly pushing ahead with massive 50,000Mbps broadband rollout to leapfrog rest of the world on internet speeds

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  • I'm sure I have the same ISP as you, but so far I didn't splurge to buy 10G or 25G gear.

    If you don't mind telling, what router and switches did you go for?

    Or did you go the Michael Stapelberg route?

    • Netanyahu gifted Trump a golden pager during their meeting in Washington

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  • Oh my god I hope they both die soon

    • If Musk succeeds in "repealing all regulation", what's the best strategy for a normal person? Unethical answers only.

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  • Fair point, but without regulations your claims can be way wilder, and you don't have to make stuff safe to ingest anymore. Overall I think quackery can become even more profitable.

    • If Musk succeeds in "repealing all regulation", what's the best strategy for a normal person? Unethical answers only.

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  • I was going to say armed insurrection, but on second thought that might be ethical under those circumstances.

    Unethically probably the most gain could be in manufacturing fake medicine. Cheap inputs, expensive prices.

    Ah, in fact, even better for repeat customers: Making real medicine and selling the hard stuff over the counter (assuming drug schedules are "regulation").

    • Do you pre-order digital games? If so, why?

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  • No

    • Just asking

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  • Alpha release if anything. Their minds are not properly debugged yet.

    • Elon Musk says he and Trump are shutting down USAID

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    • Musk claims DOGE is halting Treasury payments, calls USAID ‘a criminal organization’

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  • It's time that congress strangles the executive with the purse strings

    • Edward Snowden slams Nvidia's RTX 50-series 'F-tier value,' whistleblows on lackluster VRAM capacity

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  • Yeah that does seem a bit weird, my four year old RX 6800 has 16 GB VRAM already

    • Ranking the best vintage video games (25 years or older)

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  • I played it again last year. Still fun!

    I usually play the GOG version on Windows 10 with dxwnd and these settings:

    • Only 1 in 10 Oracle Java users want to stay with Big Red

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  • I've been running my Minecraft client on Azul Zulu builds of the OpenJDK for years, just because I trust anyone else more than Oracle.

    Of course my Minecraft server is running on Linux anyway, with the openjdk build from my distro.

    Honestly I don't know what differences there still are that would motivate companies to use Oracle JDK. I thought Oracle JDK and OpenJDK converged strongly a few years ago.

    • Code is a spectrum

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  • Ah as an intermediary for TypeScript? Fair point.

    • Deepseek when asked about sensitive topics

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  • The Chinese tanks stopped for the man in the photo!

    What a line dude.

    The military shot at the crowd and ran over people in the square the day before. Hundreds died. Stopping for this guy doesn't mean much.

    • Isn't EU's "VAT" a regressive tax? Why do they have that, instead of something like, taxing the rich?

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  • being a registered business they purchase for prices without VAT

    That's not true, sorry. A business pays stuff with VAT included too, but they can later claim back the VAT they paid against the VAT they raised from selling stuff, so they don't have to hand all of that over.

    • Isn't EU's "VAT" a regressive tax? Why do they have that, instead of something like, taxing the rich?

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  • You probably mean the sales taxes, those look similar from a consumer point of view, but they work differently.

    In a VAT system the taxes are collected all along the value addition chain. Each sale of intermediary products has the VAT cost on it, but companies can claim the VAT that they pay for their inputs against the one they collected on their outputs. In effect each company hands over the part of VAT that is raised on their part of the value addition. In the end it all comes from the consumer who buys the final product but doesn't sell anything onward so they can't claim their paid VAT against anything. This system determines the end consumer automatically.

    In a sales tax system, only the sale to the final end customer is taxed, and intermediary products are not taxed. Intermediary companies must prove to their suppliers that they are not end customers, that they intend to sell things onward, and that they are therefore exempted from sales tax and the supplier does not have to collect sales tax. If that fails, then that means mistakenly a company has to pay sales tax, and then their customer has to pay it again.

    Other than that I don't know enough to compare:

    • What is more or less administrative overhead.
    • What is more or less open to fraud.
    • To what degree this is linked to the existence of a single national or many regional tax rates

    • Isn't EU's "VAT" a regressive tax? Why do they have that, instead of something like, taxing the rich?

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  • Just to make sure you know: Basically everyone has a VAT, except the US. It's not some special EU thing.

    We have it in Switzerland, Canada has it, Japan has it, China has it, India has it, Russia has it, Brazil has it, Indonesia has it, Australia has it, Ukraine has it, Mexico has it, South Africa has it... I'm stopping here, but every country I googled had it so far.

    • Why do you hate Teams/Why is Teams despised?

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  • It starts using an entire core for UI work when I move my mouse (Roccat Cone Pure 2017), and becomes unresponsive. Had to get a different mouse just for this shit. At least I got my workplace to pay for it.

    Support did not even try to replicate the issue, instead they wanted me to upgrade to the "New" Teams when I explicitly told them that I didn't have that option in my org.