Re: Bandwidth Customer ratios

Mitchell B. Wagers ( (no email) )
Thu, 11 Dec 1997 15:38:39 -0800

No, I understood :)
I was referring to the "general" usage statements.

At 06:27 PM 12/11/97 -0500, you wrote:
>I think you misunderstood me -- I'll oversell the bejeezus out of a T-1 so
>long as its not saturated. If my average customer profile is one who does
>nothing but look at standard web pages and read Email, with the RARE
>download, and I can get away with 200 ports on a single T-1, and saturate
>that T-1 only to about 75% at peak, then I'm damn well going to do it, and
>save the cost of a second T-1. But as soon as I see peaks above 75%
>(PEAKS, not sustained usage) over 80%, then its time to add more capacity.
>At 03:18 PM 12/11/97 -0800, you wrote:
>>I'm with you, I don't like "shorting" bandwidth, which is what happens when
>>you say you can fit 96 33.6's on a T, because that is way over the total
>>bandwidth available...
>>At 06:08 PM 12/11/97 -0500, you wrote:
>>>I believe it all varies based on your usership, and you shouldn't put a
>>>hard, fast number on it. If you can feed 150 "ports" on a T-1 and not
>>>saturate the T at peak usage, then do so! If you can only support 60
>>>users because most are download hogs or using video on demand, time for a
>>>new T, in spite of that 96 recommendation (which seems to me to be based on
>>>a HORRIBLE ratio... A T-1 is ABOUT 28 56k modems, or about 46 33.6k modems.
>>> Now, I don't know about YOU, but let's assume everyone's using 56k
>>>(unrealistic -- 33.6k is FAR more common, even now). Let's assume some
>>>overhead, and call that 24 concurrent downloads at 56k. Are ONE in FOUR
>>>of your customers doing a SUSTAINED download at any given time? Not
>>>here, they're not.
>>>At 05:36 PM 12/11/97 -0500, you wrote:
>>>>-> A silly question for someone,
>>>>-> Has anyone found out a decent formula for figuring out how much
>>>bandwidth is
>>>>-> needed to provide a decent service to "X" amount of dialup customers?
>>>>-> than the obvious phone call stating "Man downloading is sooo slow?" I
>>>>-> haven't figured out a really good way of telling. I have to factor
in a
>>>>-> nominal number of webpages that we host also. Any kind of generic
>>tips or
>>>>-> thoughts would be helpful.
>>>>Boardwatch magazine printed an article a while back and I believe they
>>>>suggested 96 dialin lines per T-1 of bandwidth into the Internet. This of
>>>>course whas when we were using 33.6kbs modems, not ISDN and 56k series
>>>>Jeff Binkley
>>>>ASA Network Computing
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