 DerchPremium
join:2004-10-16
Cross Plains, WI | reply to elias
Re: Cable vs. DSL I disagree, Cable companies like to crowd there nods. People take a chance with DSL because they want dedicated bandwidth. That's my opinion though, others might disagree... |
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Reviews:
 ·Armstrong Zoom ..
| Things get crowded no matter what. A node can be broken up or you can just add more upstream and downstream ports to a node. The concept that a node is limited and then cable companies just force more than they should is not correct. I admit some cable companies probably do push it but that is the company, not the technology.
The same things can happen with DSL. Pipes can get crowded, DSL does not have unlimited pipes to the internet or hardware with unlimited capacity.
I think one problem with DSL is the fact that cable length can change because it actually may. For example, if a neighborhood gets a lot of customers the phone company may actually run new cable and "shift" people around. |
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Hickerx2God Bless The U.S. Military
join:2001-03-04
Franklinville, NY | said by keyboard5684:Things get crowded no matter what. A node can be broken up or you can just add more upstream and downstream ports to a node. The concept that a node is limited and then cable companies just force more than they should is not correct. I admit some cable companies probably do push it but that is the company, not the technology. The same things can happen with DSL. Pipes can get crowded, DSL does not have unlimited pipes to the internet or hardware with unlimited capacity. Kinda-sorta, but not really....
The fundamental difference between cable and dsl "shared bandwidth", is that with DSL, a "fat pipe" only needs to be installed from the CO on. With cable, "fat pipes" would need to be installed from every node to the head end/CMTS, then also from the head end/CMTS on.
Of course, this is a simplistic view, but pretty accurate.
Im my town, VZ has only one dslam and no RT's. Adelphia cable has 15+ local nodes. DSL's dedicated bandwidth back to the CO, eliminates any "sharing" problems, provided there is enough BW from the CO. Adelphia would have to have a fat pipe connecting every node. It's definitely possible for DSL systems to get "crowded", but it's a hella lot cheaper for a Telco to combat it than a cable co.
It is most definitely an issue with the technology, and the reason for DOCSIS development.
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Kerry for President? Is this Saturday Night Live?....whew!....it was only a bad dream |
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| NOT TRUE!
Most cable companies are hybrid fiber/Coax. Fiber runs from the Headend to the node, and is distributed from the node to the premises by Coax. That is why the NODES are user limited!
The runs from the Node to the headend are multi-strand fiber, so they ARE extremely FAT! |
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Reviews:
·Armstrong Zoom ..
| Nodes are user limited but breaking those nodes up is not difficult. Basically you can take a node and "cut" it in half. You would just pull off a strand of fiber and with a transmitter/receiver you now double capacity! You can keep breaking up nodes as much as needed.
Cool thing about cable is that it is really primed to deploy fiber to the home a lot easier than the telco can. The reason being that the fiber is already to the node. You could just start stringing fiber to the home instead of coax, right along the same cables. People talk an awful lot about telcos doing fiber to the home but realistically a cable company could do it, and fast. They just do not have to, yet. |
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Samwoo
join:2002-02-15
Rancho Palos Verdes, CA | reply to Derch
cable does crowd the node which means a hogging neighbour can take up bandwidth... but because of bandwidth caps it probably several hogging neighbors to take up the bandwidth.
This bottle neck is local to the node.
However there is still the possibility of bottlenecks for the co (distribution center) no matter what service is used. often the co can get crowded and, when that happens, if their service is broken up into nodes or not, it really doesn't matter. DSL can't guarantee speeds either. |
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Hickerx2God Bless The U.S. Military
join:2001-03-04
Franklinville, NY | reply to test3
said by test3:
NOT TRUE!
Most cable companies are hybrid fiber/Coax. Fiber runs from the Headend to the node, and is distributed from the node to the premises by Coax. That is why the NODES are user limited!
The runs from the Node to the headend are multi-strand fiber, so they ARE extremely FAT!
That's exactly what I just said
The problem is that only newer systems(maybe 3-5 yrs old at most)use fiber at the node. There are a hella lot of first generation cable systems left.
The "fat pipe" that supplies the node is then split up to 1500x.(usually not that many, but certainly hundreds in alot of systems)
So, like I said, the cable co has to add bandwidth to each individual node, whereas the Telco only has to add bandwidth to the CO.
So, in reality, DSL is also shared bandwidth, but it's shared at a point that is inherently easier and cheaper to upgrade. Also, with DSL's distance limitation, the probability of over-selling is quite remote.
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Kerry for President? Is this Saturday Night Live?....whew!....it was only a bad dream |
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