Opening a fract T1 for modem access in Linux

[Jeremy Fowler]

DS1 and T1 aren't the same thing. T1 specifies the North American T-Carrier
system (compared to the European E-Carrier system). DS1 specifies the digital
signal transmission rate based on levels of DSO, which is a transmission rate of
64 Kbps. DS1 specifies a data rate of 1.544 Mbps at a DSO multiple of 24.

> -----Original Message-----
> From: owner-kclug at marauder.illiana.net
> [mailto:owner-kclug at marauder.illiana.net]On Behalf Of Gerald Combs
> Sent: Friday, September 13, 2002 1:13 PM
> To: Duane Attaway
> Cc: Jared; kclug at kclug.org
> Subject: Re: Opening a fract T1 for modem access in Linux
>
>
> On Fri, 13 Sep 2002, Duane Attaway wrote:
>
> > On Fri, 13 Sep 2002, Jared wrote:
> >
> > > I really appreciate your information, and will start looking for a
> > > digital modem instead of a regular analog. Is there a site I can
> > > go to for more of this kinda information?
> >
> > Here is a nice description of how T1 hardware really works if you are
> > interested.  It may help understanding how it works to be able to look
> > past the marketing behind the products:
> >
> > http://www.shout.net/~wildixon/telecom/t1/t1.html
>
> Great link!  I think that he should have spelled out the fact that a DS0
> is the line that Bell runs to your house, a.k.a. a POTS (plain old
> telephone system) line.  He also didn't explicitly state that a T1 and DS1
> are the same thing.
>
> BTW, the page up one level at http://www.shout.net/~wildixon/index.html
> has lots of useful info as well.
>
>
> > Being able to troubleshoot your own equipment can determine if it is your
> > problem or the telephone company.  When they do not wish to look into the
> > problem, sometimes troubleshooting skills become necessary.  I was able to
> > connect a scope on my isdn line once and determine the phone company had
> > some serious noise comming into my house.  Even though they didn't
> > understand what an oscilloscope was, my ISP did.  And the heated calls
> > from my ISP to the telephone company got a telephone guy out to my house
> > at 4am Sunday morning.
>
> When I worked at an ISP, they were kind enough to pay for an ISDN line at
> my house.  A few weeks after it was installed, it stopped working.  The
> tech came out, tested it and declared it good.  The problem was that he
> only tested it for voice connectivity - the switch at SBC was rejecting
> data connections (ISDN makes a distinction between the two).  It took
> several days of pestering to get them to admit to a problem and fix it.
>
>
> I've found that SBC more often than not impedes troubleshooting instead of
> facilitating it.  Knowing how the gear and plumbing works lets you cut
> through the line of bull they often feed you.
>
>
>