proland
Premium
join:2002-04-20
Sunnyvale, CA |  How big is a AT&T node
Out of curiosity, how big is a "node" of AT&T users, is it a block, a square mile? Any way to know what "node" one is in, to compare service quality with neighbors? Better yet, is it mapped anywhere that the public can see? |
|
schja01
I need to get a life.
Premium,MVM
join:2000-04-27
Morton Grove, IL
clubs:   | I haven't a clue.
If AT&T were smart (and I am sure they are) they'd keep that kind of information close to their vest.
James
--
Damn the Torpedoes, Full Speed Ahead ! |
|
DJ
Premium
join:2001-06-13
Columbus, GA
 ·Knology
| reply to proland
A node is actually a piece of equipment that hangs from the fiber/coax lines. Sometimes they're placed on the ground in an enclosed casing. You'll see many line extenders (amps) hanging on the lines, about every 1/4 mile, which often look like tarnished silver bricks. A node looks similar, except they're much more bulky and usually white in color. Nodes are spaced much farther apart, and can be found by large housing developments, major intersections, and the like. Once you spot one, it'll stick out like a sore thumb.
--
Where's my mojo??? |
|
beeman65
join:2001-07-23
Mckeesport, PA | reply to proland
I was just reading a PDF document from 1999, and it said that ATTBI's standard fiber nodes serve 2000 homes.
--
Better than porn: The Broadband Photography Forum |
|
soundsaboutright
@attbi.com
| That sounds about right...keep in mind that it is connected to around 2000 homes but that doesn't mean everyone has service. In fact, some may have just telephone service, cable, or HSD. Some have all three services. Either way, the capactity issues don't start happening until the switch or router at the headend nears capacity...which is far sooner than the node reaching capacity. |
|
Green Voodoo
Green Voodoo
join:2002-09-08
Here
| reply to proland
The homes that are supported by a NODE depend on the design of the system. Some are 2000 and some are as small as 100. It really depends on the system design at the time it was built. It is not based on mileage or area but relies on "homes passed". The design for 2000 homes is able to be split up if the use increases. Many fibers support each node. From 2 to 8 fibers per node cabinet. |
|
jasqid
Fiber In Your Diet?
join:2002-04-02
East Palestine, OH
| reply to proland
I had an executive engineer at my property to inspect a pedestal and I was able to ask about the nodes here. The part of the fiber loop I am in contains 27 nodes for my township. Each of those nodes has a capacity of 650 users at one simultaneous time. There is also a maximum of 6 line amps in a run before they will place another node. If its even cost effective. One node is approx. $60K not including the labor and other materials to install it. There is also a maximum of 6 line amps per run. After 6 line amps the signal has too much noise.
The great thing about where I live is it's very rural. (I'm very lucky to even have cable here....:)) So reaching the capacity of the node (753ft away)will not likely happen. Unless the farmers on both sides of our little development sell off to another developer and they build 100 homes!!hehehe |
|
jabinns
join:2002-02-27
Salt Lake City, UT | reply to proland
Looking at some of the costs to provide the service, its amazing if they even made a profit on this. I know I will get flamed for this, but we do get a pretty good deal for what we pay. |
|
OptimumSpeed
join:2001-06-13
Prospect Heights, IL
| reply to proland
Recently, ATT contractors have been laying cables in our condominiums. I see two green "boxes" outside, about one block from each other. They have telecommunications written on them. Also, there's a big, silver-colored piece of hardware inside of them with black cable attached to it. Does anyone have any idea what this is? Is it a node? |
|
CableGuy69
He gone
join:2002-07-05
Glendale Heights, IL | Sounds like an LE (amp) to me. |
|
OptimumSpeed
join:2001-06-13
Prospect Heights, IL | What do amps do? |
|
jasqid
Fiber In Your Diet?
join:2002-04-02
East Palestine, OH
| reply to OptimumSpeed
said by OptimumSpeed  :
Recently, ATT contractors have been laying cables in our condominiums. I see two green "boxes" outside, about one block from each other. They have telecommunications written on them. Also, there's a big, silver-colored piece of hardware inside of them with black cable attached to it. Does anyone have any idea what this is? Is it a node?
The green boxes are ususally transformers for electrical service. (Underground Utilities??) The silver box sounds morelike your node. |
|
Tech3100
join:2002-04-17
Deep South
| reply to proland
THe Offical Number of modem's that ATTBI will use on a node is
***********436 Cable Modems/node************
Some nodes are doubled (2 nodes) so that they can handle more of course if populations demand.
But I work at tier 2, and I know ATT will not put more than 436 cable modems on one node. any more than that and you notice a bandwidth drain and even some customers will not always be able to connect to the internet even tho they have an IP. (basically their Default gateway won't beable to route properly because it is already being used by someone else)
--
downstream = 1504 Kbps, upstream = 640 KbpsYour Friendly neighbourhood Tier 2 man  |
|
Green Voodoo
Green Voodoo
join:2002-09-08
Here
| said by Tech3100 :
THe Offical Number of modem's that ATTBI will use on a node is
***********436 Cable Modems/node************
Some nodes are doubled (2 nodes) so that they can handle more of course if populations demand.
But I work at tier 2, and I know ATT will not put more than 436 cable modems on one node. any more than that and you notice a bandwidth drain and even some customers will not always be able to connect to the internet even tho they have an IP. (basically their Default gateway won't beable to route properly because it is already being used by someone else)
I think you might be talking about a different Node. These Nodes are RF nodes and they donj't have anything to do with IP pooling or gateways. There are Nodes that are named "gateways" also so you could really get confused over the "data" gateway and the RF "gateway". I have never seen the 436 number and I know that there are different designs which have different "homes passed" on Nodes. Cable engineers have changed their minds over that last 10 years. At first they designed around 400 to 500 homes per node, then they went to 2000 homes per node and then they went lower actives per node and decreased the house count down to around 100. |
|
Tech3100
join:2002-04-17
Deep South
| reply to proland
No Really Att will only put "436" Cable modem's on a node. I'm not trying to argue, I'm just telling how att run's network.
I even asked my Supervisor.
Here even look at this pic of my Real time node status for a down town Seattle area.
I have NEVER seen it more than 419 on a node.
(ps I'm sorry it's a BMP pic, but it is somewhat small.)
--
downstream = 1504 Kbps, upstream = 640 KbpsYour Friendly neighbourhood Tier 2 man |
|
djdanska
Premium,MVM
join:2001-04-21
Glen Ellyn, IL
clubs:
| reply to proland
**deleted**
sorry, wrong post
[text was edited by author 2002-10-03 19:20:39] |
|
djdanska
Premium,MVM
join:2001-04-21
Glen Ellyn, IL
clubs:
 ·Sprint Mobile Broa..
·T-Mobile US
 ·A + Net
·Mediacom
·RCN CABLE
| reply to Tech3100
When i worked for Att broadband a few years back. I saw oak park illinois one time at over 900. They eventually split the node. It was really starting to slow things down.
--
»www.sonic.net/~raj/disciples/history.html |
|
Tech3100
join:2002-04-17
Deep South
| reply to proland
Yeah, it's only in the past year that they have only been doing 436/node, for speed issues and so the network runs smoother.
--
downstream = 1504 Kbps, upstream = 640 Kbps
Your Friendly neighbourhood Tier 2 man
Oh and there are some Super Nodes that can handle 2000 Cablemodems but they aren't too common.
[text was edited by author 2002-10-03 19:32:34] |
|
djdanska
Premium,MVM
join:2001-04-21
Glen Ellyn, IL
clubs: | this is back in the day when they used the motorola cybersurfers.
--
»www.sonic.net/~raj/disciples/history.html |
|
Tech3100
join:2002-04-17
Deep South
| reply to proland
LOL yeah Motorola Cybersurfers, We have been phasing tho's out scince the spring.
We're Trying to get rid of all non docsis modems
--
downstream = 1504 Kbps, upstream = 640 KbpsYour Friendly neighbourhood Tier 2 man |
|
