At 03:51 AM -0400 10/22/2005, Charles Martin wrote:
From: [EMAIL PROTECTED]
Residential-class xDSL and Cable are down so often that a
v.90 modem is and will be a necessity for a long time to come.
Maybe where YOU live ... we just had our first serious cable modem
disruption (12 hours!) in FIVE YEARS here.*
*I'm not counting the periods during the hurricanes that passed
through our area last fall -- the power was out, so I don't know if
the cable modem was working or not. :)
If the power was out, then your cable modem was out. If your cable
modem is on a UPS then I'd guess there's about an 80% chance that the
IP connectivity was lost anyway because of badly managed upstream
dependancies.
I'll betcha there are hours and hours of outtages you just haven't noticed.
Excluding major natural catastrophies, POTS systems provide, by
nationwide average, 99.99% uptime. They actually do 5-nines
(99.999%) in many areas (a bit over 5 minutes of downtime per year).
#1 outtage cause: Vandalism - people taking hatchets to cables etc.
xDSL has yet to get over 95%.
And cable modem systems are in the 70 to 80% range.
Due to the higher dependance on IP networks (especially for VoIP),
the Bells and Cables are supposedly working hard to improve these
numbers. Since they've been dragging their feet, their hands may be
forced by FCC rulemaking over the next year or two.
IMO, the Bells have a much easier task because most of their outtages
are last mile. The Cables have serious infrastructure issues.
Source: FCC hearing transcripts; google is your friend.
FWIW,
- Dan.
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