 JohnInSJPremium
join:2003-09-22
San Jose, CA
 ·PHONE POWER
 ·Comcast
2 edits | reply to joetaxpayer
Re: Doubtful Comcast will ever release the bandwidth meter They claim 1-2% of the pipe capacity.
It's actually fairly accurate. Ask any ISP.
We've done this math before, but for fun let's go with a 12/2 line, 14Mbps total, or 14Mb*60*60*24*30=4.3258667 terabytes total bandwidth capacity.
Take 1% of that...
14 Mb * 60 * 60 * 24 * 30 * .01 = 44.296875 gigabytes
Or 2%
88GB
and there you go.
The oversubscribed model is based on providing enough capacity for 1-2% usage across all users.
Given Comcast has a stated cap of 250GB - closer to 7% - they may actually be using a 5-10% oversubscribed model.
A nice article (it even mentions Comcast!) that explains the reality of the business is
»jobs.tmcnet.com/topics/broadband···ment.htm
One quote:
quote:
Consumer “broadband” services are usually priced based on their peak download bit rate. A DSL service might be good for 3 Mbps, a cable modem set to 6 Mbps, and a fiber-to-the-home service rated at 50 Mbps. The ratio of peak to average rate is known as the oversubscription ratio. This ratio can be very high in practice. Today, a typical consumer’s average usage might be in the 50 kbps range. (That’s about an order of magnitude higher than the average dial-up modem user’s usage.) So the oversubscription ratio could well be over 50 or even 100 to one! That has a big impact on the retail ISP’s costs.
Or, 1-2% usage. |
 DarkLogixTexan and ProudPremium
join:2008-10-23
Baytown, TX
kudos:3
1 edit | and thats just on the low tier
16/2 18*60*60*24*30/1024/1024/8
5.56182861328125 Terabytes
then ramp on upto 50/10
18.5394287109375 Terabytes
but then figure the capasity of an 8ch line
127.3040771484375 Terabytes permonth
304+108*60*60*24*30/1024/1024/8
that means is everyone on a node had an 8ch modem but was only on the 16/2 tier then
22.888888888888888888888888888889 users could go full speed all the time
or 6.8666666666666666666666666666667 users on the 50/10 plan could go fullspeed all the time |
