Re: More modem problems with kernel 2.4.18
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On Thu, Jun 20, 2002 at 11:44:21PM -0700, Vineet Kumar wrote:
> [CPU]--serial-cable--[modem]--phone-line--wall
> | |
> | power cord
> | |
> +-[surge protector]---wall
[CPU]--serial cable--[modem]--phone---wall
| |
| |
| |
+-power cord-----[surge protector]---wall
> Where's the misunderstanding?
The line noise isn't worth it on the phone line. Yeah, it cleans up the
power lines pretty well, but it takes a bit more to keep a phone line
noise-free and [external] modems a bit more tollerant to phone line
voltage changes from my experiance. You can go with a surge suppressor
on the phone line, but you won't get quite the same speed, especially
past 28.8kbps.
Cable modems and televisions are a different story: surge suppressors
with coax cable hookups are pure evil. If they decide to go flaky,
it'll start throwing line noise back onto the cable line, and you'll
slow everybody in your neighborhood down and give them bad TV reception
on 2 and 3, and in extreme cases, as high as channel 10 or 12. The
cable company will roll trucks when there's complaints of bad signal,
and if they can't find it on thier line, they'll start trying to trace
it back to the house. If it turns out to be your equipment doing it,
the cable company will charge you for thier inconvienence, expect an
extra $100 or so on your bill if you were the cause. Cable surge
suppressors were a pet peeve of mine when I worked the phones for @Home.
Don't bother with them at all, especially if you lease a cable convertor
or cable modem from them. Those will eat it and die without passing
voltage on to your network or other AV equipment, and the cable company
will send someone out to replace them free of charge (this is a
compelling reason not to buy your own cable modem. That, and if
something breaks, you won't get modem support from your cable operator
if you own your own modem, beyond getting it configured (which is thier
problem). Furthermore, AT&TBI is reducing lease prices on thier cable
modems by $7 and raising service prices by $7, so you'll only save $3
with your own modem, not $10. The increase was to cover a reduced
demand for broadband and increased costs associated dealing with flaky,
cheapass modems the cheapskates tended to buy to avoid lease fees)
- --
Baloo
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