Re: Leased Line AS/400 access

John,

    I've heard the term "DS-x" mentioned where "x" was multiplied with
channels to get total bandwidth but I have yet to find a publication or
website that explains this.

    DS vs. T: I agree. A Bell Atlantic tech told me recently that "DS"
refers to fiber whereas "T" refers to copper. They don't bother running
copper anymore, it's too heavy & expensive. Matter of fact, we recently had
a demark installed in our corporate offices for our frame and they ran
fiber. Out of 48 (maybe 64) tubes of glass in the cable they ended up using
2! I asked why run 48 lines when we needed only 2 and they said that's all
they run now. The rest will be used either by us for expansion or other
firms on our street/ in our neighborhood.

Bill Paris
Sorrento Cheese Co., Inc.
716-823-6262 x376
bparis@sccmail.com


>From my limited understanding,  a T1 can be used to deliver ISDN PRI
>services, or Frame Relay services, or one of several other protocols.
>
>Technically speaking, in digital networking, a single 64-Kbps channel is
>referred to as a DS-0. Beyond that is the DS-1, a collection of 24 DS-0
>channels. A DS-1 delivered over a copper wire is called a T1. This term
"T1"
>has become so popular that people often use it to refer to any 1.5 Mbps
>link.
>
>I think it is also largely a matter of telco packaging. Our 256K ISDN
>connection could just as easily have been purchased as a fractional T1. The
>difference is the in the cost. ISDN was packaged at a lower cost than
>fractional T1, even though they both employ the same copper.
>
>John Taylor


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