4 ms·
A facinating teardown! I wonder how long it will be before we manage to get 100G over reasonable copper length. https://en.wikipedia.org/wiki/100_Gigabit_Ethern
by berbec 4y ago
A facinating teardown! I wonder how long it will be before we manage to get 100G over reasonable copper length. https://en.wikipedia.org/wiki/100_Gigabit_Ethernet https://en.wikipedia.org/wiki/100_Gigabit_Ethernet says we can have 100GBASE-CR4 for 7m but no Cat8 yet.
- wmf 4y agoThat would probably be more expensive than fiber. It's time to move on from CatN cabling.
- walrus01 4y agoTwo strand singlemode already costs far less per meter than ordinary cat6 utp nevermind cat6a or shielded stuff. Copper isn't cheap.
- teaearlgraycold 4y agoMaybe my future house should be wired for fiber...
- vermilingua 4y agoSee https://news.ycombinator.com/item?id=33393540 https://news.ycombinator.com/item?id=33393540
- walrus01 4y agoone of the challenges there is that you can't do PoE over fiber, so for common house use with things like security cameras and 802.11ac/ax access points, you still want copper.
- DannyBee 4y agoit also has a better bend radius by far now. (cat6a is about 1 inch, g.657a3/b3 is <0.25 inches)
- sebazzz 4y agoNot easy to pull though typical European ductwork in the wall of a house.
- adql 4y agoAnd cat6 is ? Bend radius can be a problem with fiber but you can get bend-insensitive ones. The problem with fiber is really you need fusion splicer for termination and that's pretty pricy
- detaro 4y agoCouldn't you get away with mechanical splices? For short runs like this the extra losses shouldn't matter too much?
- adql 4y agoprobably ? No idea about details. I guess "just" terminating them would be fine if you just installed it once but at least looking at tutorials it does look like a PITA compared to CAT connectors
- DannyBee 4y agoA lot of tutorials are old. Mechanical splices have improved very quickly in the past 5 years. Talking with my friend who is an home automation installer, he says they now just use mechanical crimp splices and they don't take them longer than, say, prepping and terminating a coax cable. He says it's definitely shorter now than the average time they spend trying to untwist, straighten, and line up wires in a cat connector. They used to use connectors requiring polishes that took 30 minutes
- dale_glass 4y agoYou can do without splices at all, just fish the cable through the wall with connectors and all. The duplex LC connector can be disassembled, and with a bit of tape to keep things together you can get both fibers through much more easily. If you're lazy, you can just use a premade cable that's longer than you need. A slightly prettier solution is a keystone jack.
- willis936 4y agoCopper's loss tangent is high. There's no getting around that. PAM4-based 50GBASE-CR DACs have similar length. Twinax has more bandwidth than STP. We're at the physical medium's limits. Sure, you can pump the voltage but that quickly hits diminishing returns. Best to use copper for sub 1 meter and fiber otherwise.
- justsomehnguy 4y agoNo point. 10G DAC is already hot enough, bulky and too thick. With SFP modules it's even hotter.
- adql 4y agoI'd guess never. Twinax maybe, but "Cat8" would probably be more expensive than fiber above few metres already. Fiber is cheap, it's fancy electronics, lasers and photodiodes that make the thing expensive, but once you're there per metre price is cheap.