kd6caeP2p Shouldn't Be A Crime
join:2001-08-27
Palmdale, CA Reviews:
 ·Vitelity VOIP
 ·AT&T U-Verse
| can speeds over 2Mbit be achieved now? This is a curiosity I've been wondering for a while now. When it comes to upstream speeds via cable, are cable operators technically able to provide speeds beyond 2 megabits/second with existing equipment, or is 2Mbps the limit?
I ask this because while cablevision can provide it's customers with up to 5Mbps upload, no other cable provider anywhere in North America that I'm aware of, offers uploads any higher than 2Mbps, and that usually requires a business tier to even get that. Is there a technical reason why cable operators aren't yet offering, even to business users, speeds greater than 2Mbps upstream? What makes Cablevision able to offer double the upload plus, while every single other provider has a max it seems of just 2 meg? |
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 Chris 313Come get somePremium
join:2004-07-18
Houma, LA
·AT&T U-Verse
·Comcast Digital ..
 ·Comcast
| said by kd6cae:This is a curiosity I've been wondering for a while now. When it comes to upstream speeds via cable, are cable operators technically able to provide speeds beyond 2 megabits/second with existing equipment, or is 2Mbps the limit? I ask this because while cablevision can provide it's customers with up to 5Mbps upload, no other cable provider anywhere in North America that I'm aware of, offers uploads any higher than 2Mbps, and that usually requires a business tier to even get that. Is there a technical reason why cable operators aren't yet offering, even to business users, speeds greater than 2Mbps upstream? What makes Cablevision able to offer double the upload plus, while every single other provider has a max it seems of just 2 meg? Why Cablevision can offer 5 upload is cause they're on a Docsis 2 system for that tier, which is now maxed out for the 30/5 tier.
The 15/2 tier is on Docsis 1.1. |
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 dvd536as Mr. Pink as they comePremium
join:2001-04-27
Phoenix, AZ
kudos:4 | reply to kd6cae
said by kd6cae:This is a curiosity I've been wondering for a while now. When it comes to upstream speeds via cable, are cable operators technically able to provide speeds beyond 2 megabits/second with existing equipment, or is 2Mbps the limit? The limit on a node is 10mbps. limiting to 2mbps is just good bandwidth management. i doubt those CV subs with 5mbps up rarely get all their 5mbps or they're capped.
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You can never be too rich, too thin or have too much Bandwidth |
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| your wrong . Come to the cablevision forums. We get the speeds. the docsis 2 network is not effected by the docsis 1.1 network. ITs only effected by how many boost users are on the node. Boost is not capped either. Only the normal package is.
Is cablevisions network really that much better? |
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 SDKiwiVIP
join:2002-05-27
El Cajon, CA
kudos:2 | reply to dvd536
said by dvd536:said by kd6cae:This is a curiosity I've been wondering for a while now. When it comes to upstream speeds via cable, are cable operators technically able to provide speeds beyond 2 megabits/second with existing equipment, or is 2Mbps the limit? The limit on a node is 10mbps. limiting to 2mbps is just good bandwidth management. i doubt those CV subs with 5mbps up rarely get all their 5mbps or they're capped. Some related factoids.
A single 16 QAM upstream can deliver about 9 mbps in a 3.2 mhz carrier. All 1.0 and 1.1 modems support 16 QAM.
A single 64 QAM upstream can deliver about 15 Mbps in a 3.2 mhz carrier. Only 2.0 modems and eMTAs support 64 QAM. Aggregate upstream speeds above 20 Mbps are available to 2.0 modems if a 6.4 mhz upstream carrier is used.
More than 1 upstream carrier can be assigned to a node ... on any current CMTS.
Shared upstream capacity above 10 Mbps per node is clearly doable, but it takes some extra investment in spectrum, 2.0 modems and CMTS line cards. |
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