RR User
@rr.com | reply to sivran
Re: Look out...tiered pricing and monthly caps coming !
It's gigaBYTES. |
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joetaxpayer
I'M Here Till Thursday
join:2001-09-07
Sudbury, MA
 ·Comcast
·Comcast Formerly ..
1 edit | said by RR User :
It's gigaBYTES.
Gigabytes are used for file size transfer limits, as in 250GB cap.
Speeds are typically measured in gigabits per second.
(My answer above was not complete - a bit is one memory unit, a 0 or 1. Eight bits make a byte. There's no particular reason that some thing were measured in kilo-bit or kilo-byte, and then mega, giga, etc. In fact it makes the math tougher to calculate how long to take an X GB file to download at y Gb/s) |
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Bytezboy
join:2001-05-17
New York, NY
2 edits | reply to Racerbob
Another great writeup from Saul Hansell.
»bits.blogs.nytimes.com/2009/04/2···-videos/
More hard facts.  |
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RR tech
@rr.com
| Yeah... it's trustworthy 
said by Saul Hansell :
The cost depends on the configuration of the equipment at the node to be split. In some cases, little more than minor adjustments are needed, and the cost is $2,500. If the company needs to add a new Cable Modem Termination System, the device that connects cable wires to the Internet, it will pay $6,000 if the device is in one of its existing facilities.And if Comcast needs install a new C.M.T.S. on a pole, stringing a new a new fiber optic cable to it, the cost is $20,000.
CMTSs are much more than $6,000 each, try an average of 10x that, and you NEVER hang one off a pole. They have dozens of coax, fiber, and electrical cables connected to them and have very strict power and cooling needs. |
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RR tech
@rr.com
| Saul Hansell says he got those numbers from a Comcast presentation in 2007. I'd really like to see that presentation because he either seriously misunderstood the presentation or took a few facts out of context to spin his story.
I'd also like to see some pictures of a CMTS hanging off a pole.
...and he said these were the easier numbers to get. Can't imaging how far off he is on the harder numbers. |
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Matt
Take me down to the paradise city
Premium
join:2003-07-20
Jamestown, NC | I have to agree with RR tech, sounds like he's confusing a CMTS with an amp. That does cast a HUGE shadow over his other information. Someone should email him for more info and/or corrections. |
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swintec
Premium
join:2003-12-19
Alfred, ME
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 ·Sprint Mobile Broa..
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| said by Matt  :I have to agree with RR tech, sounds like he's confusing a CMTS with an amp. Either that, or the cabinets with the batteries in them for backup power scattered throughout neighborhoods.
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Smith6612
Premium
join:2008-02-01
united state
 ·Dish Network
 ·Verizon Online DSL
·FrontierNet Intern..
1 edit | reply to Racerbob
Here's a CMTS... looks a bit like a DSLAM 
»www.arrisi.com/_images/_products/C4.jpg
Wouldn't want one of those hanging from a pole, that's for sure. |
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Matt
Take me down to the paradise city
Premium
join:2003-07-20
Jamestown, NC
·North State Commun..
| And some of the Cisco ones that Time Warner uses are floor to ceiling! |
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Dampier
Phillip M Dampier
join:2003-03-23
Rochester, NY
| reply to swintec
said by swintec :said by Matt :I have to agree with RR tech, sounds like he's confusing a CMTS with an amp. Either that, or the cabinets with the batteries in them for backup power scattered throughout neighborhoods. We had these darn things all over Rochester when TW started offering traditional (non VOIP) phone service here. Every dozen or so phone poles featured an ENORMOUS greenish cabinet hung halfway up the pole. When they switched to VOIP, the boxes eventually were removed. |
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RR tech
@rr.com
| reply to Matt
Here's the the basic chassis for the latest Cisco CMTS, not including RF switches for redundancy or powerpacks to supply the unit with power.
Here's the back of the RF switch needed for redundancy:
Here's one on eBay for sale:
It's missing the redundant cards for upstream links ($20,000 each) and management ($6000+$36,950). It also only has 1 line card ($99,500 each) and is missing 7 line cards installable to support more nodes. At one upstream channel per node, that one line card will support 20 nodes. A fully loaded CMTS about 160 nodes.
DOCSIS 3 runs into complications multiplexing multiple downstream/upstream channels between multiple nodes, so it's easily possible that only half or less current number of nodes could be supported by such a CMTS chassis. |
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RR tech
@rr.com
| reply to Dampier
said by Dampier :We had these darn things all over Rochester when TW started offering traditional (non VOIP) phone service here. Every dozen or so phone poles featured an ENORMOUS greenish cabinet hung halfway up the pole. When they switched to VOIP, the boxes eventually were removed. Old non-VOIP system provided the power for the phones and NIDs from the distribution network. Modern VOIP based phone uses customer power with battery backup, so less power is needed from the cable co. |
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Matt
Take me down to the paradise city
Premium
join:2003-07-20
Jamestown, NC | reply to RR tech
The ones I saw at the Greensboro (Spring Garden St.) RDC were much taller, about the size of a full rack (42u). This was 2-3 years ago though, it looks like Cisco has shrunk the size of the uBR10000 quite a bit? |
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RR tech
@rr.com
| said by Matt :The ones I saw at the Greensboro (Spring Garden St.) RDC were much taller, about the size of a full rack (42u). This was 2-3 years ago though, it looks like Cisco has shrunk the size of the uBR10000 quite a bit? That CMTS unit is 18RU, but it's can't stand alone. It needs power packs, redundant RF switches, and is commonly installed with RF patch panels and combining/splitting in the same rack. So a full rack for the complete CMTS setup is not out of line.
Diagram from Cisco, powerpack, patch panel, and combining not shown.
Back side with 1 line card and custom cable (not Cisco stock 1 or 3m)
Demo of 8 line cards wired to RF switch with custom cables
The actual uBR10000 chassis hasn't changed size since it was first made. It also weights 235 pounds will all the cards installed, not including all the support equipment not in the chassis. |
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Matt
Take me down to the paradise city
Premium
join:2003-07-20
Jamestown, NC | Thanks for the clarification, the diagram you posted looks extremely similar to what I saw. |
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Anonymous_
Anonymous
Premium
join:2004-06-21
127.0.0.1
clubs:
1 edit | reply to RR User
said by RR User :
It's gigaBYTES.
TWC uses both GiB's and GB's
just to get you over the cap faster |
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swintec
Premium
join:2003-12-19
Alfred, ME
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| reply to Racerbob
Looks like TW may be taking its DOCSIS 3 ball and going home in the markets that pissed them off. »gigaom.com/2009/04/21/twc-to-cus···oadband/
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Dampier
Phillip M Dampier
join:2003-03-23
Rochester, NY
| Shucky darn. This company has demonstrated it's only slightly smarter than Frontier was during their 5GB nonsense. The ONLY plan customers in Rochester even considered rational was the 50/5 $99 plan they were proposing, and only because people thought it was unlimited. As soon as TWAlex, bless his heart, let people know it was going to be capped, probably at 150GB, people headed for the exits, having lost interest completely.
Nobody I've heard has ever complained about tiered access based on speed. If TW wanted to deploy DOCSIS 3 to sell premium speed tiers to customers, there are plenty of heavy users ready to sign up. As soon as they hear caps, they've lost interest.
Rake in the cash to pay for upgrades with premium levels of service for those heavy users and then everyone benefits, from the lowest tiers to the highest.
Usage caps are about driving usage down, applying band-aids to network management, and having a giant money party. We're paying, but we're not invited. |
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Kickenback
| reply to Racerbob
Dampier, i was had stated on your site in the comments section. (Robert S.) Docsis 3 has to be set up and running in those areas, as it was from my understanding DOCSIS 3 was passed by congress or some other governing body that all Telecos and cable comps were to upgrade to DOCSIS 3. if Time Warner/RR does not go forward with the upgrades in those areas they can or should face fines. |
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swintec
Premium
join:2003-12-19
Alfred, ME
·RapidVPS
·surpasshosting
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·RoadRunner Cable
| said by Kickenback :
Dampier, i was had stated on your site in the comments section. (Robert S.) Docsis 3 has to be set up and running in those areas, as it was from my understanding DOCSIS 3 was passed by congress or some other governing body that all Telecos and cable comps were to upgrade to DOCSIS 3. if Time Warner/RR does not go forward with the upgrades in those areas they can or should face fines.
I find that very hard to believe. Also, Telcos do not even use DOCSIS...which is a CABLE technology. Do you have any links for this possibly?
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