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Re: IP: Pac Bell says Net use may collapse phone system
On Mon, 28 Oct 1996, Fred R. Goldstein wrote:
> Yes, in the sense that the network (resi and others all together) is
> designed with the expectation that around 10% of the resi lines are in use
> at once.
Again, you have qualified this extensively, and I appreciate that.
But as a crude first approximation,,,, do you see our point? If the
ISP's only have one incoming line per every 10 to 20 customers, I don't
see how the internet users differ that much in peak patterns from the
voice network. jamie
> Essentially, you take the number of resi lines and multiply by the average
> CCS of the resi lines, the number of business lines times the average CCS of
> business lines (which is higher than for resi), the number of trunks times
> around 30 CCS (mostly busy), and add it all up. Thus a CO in a
> business-heavy area will typically be designed for a higher CCS/line number
> than one in a bedroom community.
> But that's only a first-guess estimate. In practice, engineering a real CO
> is done one at a time, based on experience. In other words, when it's
> running out of room, you add more. The problem is that recent growth has
> been fairly rapid, and telcos plan growth on a 5-10 year planning cycle.
> Fred R. Goldstein firstname.lastname@example.org
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