171–180 of 180 posts
What’s the use case for 10Gb/s Ethernet over 2.5?
Earlier quoted context omitted.
Any fs.com recommendations? (or, just look at the power numbers?) https://www.fs.com/c/10g-sfp-63?203=21772
I forget how I went about it, but I was able to get which chipsets their modules used. But honestly, unless they've sold out- 10GTek has been good for home use for me- at least for AOC and DAC. all my bidi stuff is second hand ciso off ebay
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What kind of fiber cables? If you have a link, I'd appreciate it. I can only find ones at 0.5mm.
Good catch — that was actually my mistake. I mixed up cm and mm from the marketing material, and when I actually measured just now it came out to around 0.9mm. So not quite as thin as I claimed, and I probably wouldn't have noticed if you hadn't asked. I did find some Kevlar-reinforced options that are supposedly ~0.3mm, but they seem to be raw fiber without connectors, purposed for drones, and I'm not sure about glo…
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Folks have been saying that conduit is the way, and the fiber is the future, and all kinds of things like that for decades so far. But the simple truth for all those decades is this: When there's already cat-whatever cable in the wall, it generally still works. Decently-installed conduit (ie, actually-usable conduit) adds a ton of time and expense, which is why it is very seldom used for data circuits in residential…
houses I lived in never had cat-x wiring. They had electrical cable and sometimes phone lines. but maybe statistically speaking cat-x is more prevalent now in housing built after maybe 2000.
These people aren't seeing the whole picture, but that's not new: They simply don't care, just as most folks have never cared.
And they care less and less as our (rather amazing) portable pocket supercomputers continue to supplant desktop computing in normal Internet-connected life.
Some folks are even actively against wired home networks as a premise: When I'd hang out on Reddit, sometimes I'd see photos of well-orchestrated and fairly intense home network infrastructure, but the new buyer of the home just wants it all gone from their sight and is seeking advise about getting that accomplished.
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The house I live in right now has zero phone jacks (though the overhead wires still connect to the house before disappearing completely), and it only has 1 run of functional coax (which connects to the docsis modem).
I've added some decently-installed Cat 5e, which is completely adequate for what I'm doing. (That's been a trend for me for decades: When I live in a place, I tend to hardwire my stuff.)
But the next person probably won't care about that at all. If I move out and come back to visit in 5 years, the cabling I've added will probably have been erased.
And in the next place I live, I'll probably have to add more wire again. That's normal to me; again, I've been doing that for decades now.
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And that's OK. I'm a bit of a geek when it comes to computers and networking.
Most people are not that way at all, and most people never have been that way. Most people don't give a fuck about this stuff at all.
And this is all completely acceptable.
(I guess I could choose to hate it instead, but life is too short to hate this kind of thing. Acceptance is both simpler and better-productive.)
Unfortunately the blog didn't link to the SFP+ module they're using, but everyone should know there's effectively 2 different generations of 10gbit sfp+ to ethernet^H10BASE-T modules. The old gen, labeled as 30 meters, draws ~3 W, and gets extremely hot (to the point it'll usually cause link flaps), and the newer gen, usually labeled as 100m or 80m, draws ~1.5 W, and runs much, much cooler. Example of the new gen: ht…
> Built-in Newest Marvell chip, Max. Power Consumption 1.65W
Is that wrong?
Also, I'm using this:
https://www.amazon.com/dp/B0B3F5DSXJ?ref_=ppx_hzsearch_conn_...
which says
> Build in Marvell chip, Low Power Consumption (2.0W MAX @ 30m)
I have had 0 problems. One I use for my Sonic.net Ont and the other for my a 10G switch. Maybe I don't have issues because the cable lengths are so short (1-2')?
I just checked and both are VERY hot to the touch. Now I'm worried.
Unfortunately the blog didn't link to the SFP+ module they're using, but everyone should know there's effectively 2 different generations of 10gbit sfp+ to ethernet^H10BASE-T modules. The old gen, labeled as 30 meters, draws ~3 W, and gets extremely hot (to the point it'll usually cause link flaps), and the newer gen, usually labeled as 100m or 80m, draws ~1.5 W, and runs much, much cooler. Example of the new gen: ht…
The "new gen" link you says > Built-in Newest Marvell chip, Max. Power Consumption 1.65W Is that wrong? Also, I'm using this: https://www.amazon.com/dp/B0B3F5DSXJ?ref_=ppx_hzsearch_conn_... which says > Build in Marvell chip, Low Power Consumption (2.0W MAX @ 30m) I have had 0 problems. One I use for my Sonic.net Ont and the other for my a 10G switch. Maybe I don't have issues because the cable lengths are so short (…
> The most important question was the structured cabling in the walls; was it CAT-5E or CAT-6, or even CAT-6A? Remember from the last post, 10GBASE-T might work over short runs of -5E (even though officially it's not meant to be able to). This is not quite correct. The primary problem is cross-talk. Copper wire itself will carry the relevant frequencies up to 100m without issue but even with balanced pairs the balanc…
> Cat-6A guarantees less cross-talk with more twists, better balancing, and a plastic separator inside the cable to make the cross-talk more regular and thus easier to cancel out. This isn't quite right. Cat6A guarantees the frequency and therefore effective bandwidth that is available. But it doesn't talk about physical cable type. A common structured cable for Cat6A is U/FTP which has no plastic separator, no outer…
It does specify cross-talk specs and frequency response. IIRC Cat-5E was 125, Cat-6 250, Cat-6A 500Mhz. But copper is copper and all else equal well-made copper of a given size is going to carry those frequencies regardless. Cat-5E can carry 500Mhz just fine. They don't mix some magic sauce into the molten copper before casting & drawing into wire that changes its frequency response. The real limiting factor (IMHO) and where the actual manufacturing really matters is cross-talk.
Unfortunately the blog didn't link to the SFP+ module they're using, but everyone should know there's effectively 2 different generations of 10gbit sfp+ to ethernet^H10BASE-T modules. The old gen, labeled as 30 meters, draws ~3 W, and gets extremely hot (to the point it'll usually cause link flaps), and the newer gen, usually labeled as 100m or 80m, draws ~1.5 W, and runs much, much cooler. Example of the new gen: ht…
For me the threshold has always been "can I stream a 4K movie from the NAS downstairs or from my seed box". No real need for anything above. Still I ran 10Gb single mode fiber in all the ducts.
> For me the threshold has always been "can I stream a 4K movie from the NAS downstairs or from my seed box". So basically, and this is not a snark, you're happy with 100 Mbit/s?
Earlier quoted context omitted.
Problem is you get X1 pcie gen4 cards for 10g eth but not sfp …and a lot of consumer boards have spare x1s
They're out there. Search engines are just ubiquitously poisoned to the point of uselessness for common terms[1]. But searching for specific gen4 x1 10-gig chips (like RTL8127) does produce some reasonably-inexpensive options for cards with sfp+. Give it a whirl. :) [1]: I wrote this like it's a new problem, but looking back it may be an issue as old as the hills. I distinctly remember searching for any-brand 10-meg…