Reviews:
 ·Comcast
| reply to Van
Re: I am not the most up-to-date on upgrading UVerse U-Verse is using an antiquated copper network to get from at&t's fiber network to your home. Though there are fiber to the home U-Verse installs, in new housing developments, it's still restricted to the same speeds. That is probably due to cheaper costs. Twisted pair copper was meant for voice instead of data. It's like running water through a straw while cable internet is a hose.
Distance matters because twisted pair copper isn't as well shielded as coax so the signal leaks. Getting higher speeds would be tricky. |
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 RadioDocYeah, like it matters.Premium,ExMod 2000-03
join:2000-05-11
La Grange, IL
kudos:2
 ·AT&T Midwest
| said by TriForce:Twisted pair copper was meant for voice instead of data. It's like running water through a straw while cable internet is a hose. So I guess Gigabit Ethernet over twisted pairs is magic?
Copper isn't dead, but U-Verse expansion certainly is.
said by TriForce:Distance matters because twisted pair copper isn't as well shielded as coax so the signal leaks. Getting higher speeds would be tricky. Ya might want to open a book once in awhile. Balanced twisted pair wiring doesn't "leak". That's unbalanced coaxial cable's malady...in fact leakage limits are about all that's left of cable regulation. What does happen to UTP is attenuation, which is why there are transmission distance limits on BOTH coax and UTP. |
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| reply to TriForce
said by TriForce:Distance matters because twisted pair copper isn't as well shielded as coax so the signal leaks. Getting higher speeds would be tricky.
Unless you count the twisting, they are not shielded at all.
ATT's plant craps out at 8 Mhz, while coax can carry 860 Mhz readily. (often 1000+ Mhz) |
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 elios
join:2005-11-15
Springfield, MO | reply to RadioDoc
said by RadioDoc:said by TriForce:Twisted pair copper was meant for voice instead of data. It's like running water through a straw while cable internet is a hose. So I guess Gigabit Ethernet over twisted pairs is magic? Copper isn't dead, but U-Verse expansion certainly is. said by TriForce:Distance matters because twisted pair copper isn't as well shielded as coax so the signal leaks. Getting higher speeds would be tricky. Ya might want to open a book once in awhile. Balanced twisted pair wiring doesn't "leak". That's unbalanced coaxial cable's malady...in fact leakage limits are about all that's left of cable regulation. What does happen to UTP is attenuation, which is why there are transmission distance limits on BOTH coax and UTP. not the same thing
the magic in Giga-E is the number of twists and quaitly of the copper
both of which are awful in copper lines on poles now
short of them ripping out the 40+ year old copper on the poles now and replacing it with effectively ethernet cable which btw would cost MORE then installing fiber to home
its not going to happen |
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| if you think at&t and u-verse is dead in the water now... wait till cable gets their docsis 3.1 going in a year or 2. |
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| said by Gib4500:if you think at&t and u-verse is dead in the water now... wait till cable gets their docsis 3.1 going in a year or 2.
DOCSIS 3.1 only increases the spectral efficiency by 50%. Speeds will be 1.5x what they are on DOCSIS 3.0, given the same frequency allocation. That's not revolutionary, merely evolutionary.
The real order-of-magnitude gains came from channel-bonding. And you can do that already on DOCSIS 3.0. Today, a cable company might bond 4 channels for 152 Mbps, or 8 channels for 304 Mbps. But there are over 150 channels on coax! |
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| The Docsis 3.1 platform is aiming to support capacities of at least 10Gbit/s downstream and 1Gbit/s upstream. The new specs will do away with 6 MHz and 8 MHz wide channel spacing and instead use smaller (20KHz-to-50KHz-wide) orthogonal frequency division multiplexing (OFDM) subcarriers; these can be bonded inside a block spectrum that could end up being about 200 MHz wide.
»en.wikipedia.org/wiki/DOCSIS |
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1 edit | said by Gib4500:The Docsis 3.1 platform is aiming to support capacities of at least 10Gbit/s downstream and 1Gbit/s upstream. You can already push about 6 Gbps over a 1 GHz cable plant. DOCSIS 3.0 gives you 38 Mbps of actual bandwidth per 6 MHz channel.
DOCSIS 3.1 gives you about 10 Gbps over the same 1 Ghz cable plant. That's a significant improvement, but not the game-changer that DOCSIS 3.0 was, with channel bonding.
It's essentially equivalent to a node split, except cheaper. You just mail modems to your customers, instead of stringing new fiber. That's why they're calling it 3.1 and not 4.0. It's evolutionary, not revolutionary. |
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contsolePremium
join:2003-12-30
Bloomfield, CT | reply to RadioDoc
said by RadioDoc:So I guess Gigabit Ethernet over twisted pairs is magic?
4 pair and 100 meter limit. |
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