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A DSL line refers only to your
link back to the exchange's DSLAM. All bandwidth is aggregated after
that. Thus, in the accepted sense, DSL is an unshared
service (fixed BW on local loop) compared to cable, where BW is
shared with your neighbours. I'd seriously doubt the ATM link from the
exchange onto the telco backbone is saturated, unless you have 2 bit
operators over there.
The bottleneck, if any, starts at the
ISP's end. They purchase bandwidth, and if they're starting to experience
congestion, they would/should upgrade. Hence my reference to a *reputable*
provider.
And I'd still be checking the
end users computer first before anything else, as it is most likely to be the
weakest link.
----- Original Message -----
Sent: Wednesday, January 26, 2005 11:26
AM
Subject: Re: [trading] [amibroker] OT:Two
DSL Services
FYI: The supposed fact that DSL does not
share bandwidth is a misnomer. You do get a private line back to the CO which
is only a maximum of 15,000' or so from your house. From there you share
bandwidth with a whole bunch of users and that can certainly cause major
slowdowns. I have cable and tried to switch to DSL for the upload bandwidth.
With DSL installed I checked speeds and was consistently getting only 300-700
kbps downstream with occasional blips to 1MB and as low as 175 Kbps. I had
Qwest come out and clean the line back to the CO. The tech verified it was
clean and I should be getting 1.5 Mbps as advertised. There was no change in
performance due to the shared line from the CO back to the Internet. On the
other hand, the upload was always 700-900 Kbps which only serves to prove the
down link is shared bandwidth.
BTW, my cable download speeds are
consistently in excess of 2Mbps with >200 kbps uplink speeds. I have
Comcast and live in the Denver area. I canceled my DSL
hookup.
Terry
Steve wrote:
It's not a DSL line issue as such as DSL does
not share bandwidth, unlike cable. and I'd be surprised if it was an ISP
bandwidth issue *if* they're a large & reputable ISP. If you cannot
collect your mail from your local ISP, then could be a mail server problem
their end. Have you raised this issue with them? But first thing I would be
checking is your computer for trojans, virus etc, especially if you've been
compromised & you are now in fact acting as a relay. This will max out
your upload bandwidth, which in
turn will crucify your download capabilities.
cheers
Original Message -----
Sent:
Wednesday, January 26, 2005 4:29 AM
Subject:
[trading] [amibroker] OT:Two DSL Services
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1/21/2005
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