Waterbug
join:2008-03-30
| Uverse availability
I was just doing some calculations, trying to determine the probability of Uverse availability. Here is what I came up with: An RT which delivers DSL covers a radius of 17,500' (3miles plus). That equates to an area of over 28 sq miles. A VRAD covers a radius of 3000'. That equates to less than 1.25 sq miles. So, it takes over 22 VRADs to cover the area of one RT. That's a lot of infrastructure. |
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justbits
More fiber than ATT can handle
Premium
join:2003-01-08
Chicago, IL
 ·AT&T Midwest
·AT&T Yahoo
| One interesting tidbit is that AT+T originally expected to be able to use VRADs to cover 5000 foot wire lengths, but they're having a hard time getting VDSL to handle it due to outside plant conditions. That's where your 3000' estimate likely comes in.
Are your calculations right? Are you factoring in all the turns (corners, aerials, underground) in the wire plant?
17 500 feet = 3.31439394 miles
Area of circle = pi * sqr(radius)
3.31439394*3.31439394*pi = 34.5110462 sq miles
(3 000 ft) * 3 000 ft * pi = 1.01420217 sq miles
(5 000 ft) * 5 000 ft * pi = 2.81722826 sq miles
Those calculations above would be for ideal conditions, which I'd bet are extremely rare. |
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RadioDoc
Sortofadog
Premium,ExMod 2000-03
join:2000-05-11
Chicago, IL
·AT&T Midwest
| reply to Waterbug
Most RTs do not run out to 17.5K. In fact you'll probably be hard-pressed to find many with local loops over 7500 feet.
The VRADs are an entirely different infrastructure and technology and are designed to serve much smaller numbers of customers each. You are comparing apples to mangoes.
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Toolmaster of La Grange. |
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ILpt4U
join:2006-11-12
Crystal Lake, IL | Also, VRAD loop lenghts (and therefore area served) will increase as soon as Pair Bonding is introduced, which is coming soon (sometime in the next year I think is what I've heard/read). |
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