Re: [EFM] RE: [EFM-Copper] [Fwd: Existing Loop Lengths]
Maximizing reach and bandwidth is essential. We currently deploy VDSL which
supports 22/3 Mbps down/up stream. At these rates, reach is currently limited
to less than 5 kft. The cost to deploy a high bandwidth access network could be
significantly reduced if a significant increase in reach can be achieved.
Reduced network costs will allow DSL providers to expand the network quicker and
provide more revenue opportunities for all.
Charles
Frank Miller wrote:
> Folks,
>
> I fully agree, as a DSL service provider, with Patrick's findings in hitting
>
> market requirements AND EFM definitions. I find the data presented
> real close to what we find, at Oregon Trail Internet, over 4 ILECs in the
> rural
> Pacific Northwest. Our average loop, for DSL customers, is approximately
> 13.5Kft.
> Reach of 21Kft would hit nearly 100% of our current market. But .. our
> market
> is limited by current reach. Needless to day, if I can even get more
> reach/performance
> I'll gladly sell it (21Kft and beyond).
>
> Respectfully,
>
> Frank Miller
> CIO / Oregon Trail Internet
>
> > -----Original Message-----
> > From: Stanley, Patrick [mailto:pstanley@xxxxxxxxxxx]
> > Sent: Monday, October 29, 2001 9:41 AM
> > To: Stanley, Patrick; 'Troy Manary'; Copper; stds-802-3-efm@ieee.org
> > Subject: [EFM] RE: [EFM-Copper] [Fwd: Existing Loop Lengths]
> >
> >
> >
> > Upon further review, I found that I made a mistake in
> > entering the length of
> > one of the segments for CSA 1 in my simulation. Using 10
> > self-disturbers,
> > with the loop length corrected, my simulation of CSA 1 (7.7kft working
> > length, and 1 bridged tap) gives 8.4Mbs for Echo Cancelled
> > ADSL, compared to
> > 8.6Mbps on 8kft of 26AWG wire. CSA 4, which has a working
> > length of 7.55kft,
> > and contains 2 bridged taps, gives 8.0Mbps. My apologies to
> > the group for
> > sending out the incorrect data.
> >
> > Nevertheless, the TIA draft standard that I have referenced in earlier
> > e-mails is a valuable resource for linking performance
> > objectives to market
> > coverage, and I believe that EFM over copper should strive to
> > address 99% of
> > the market (21kft, 24AWG reach).
> >
> > Best Regards,
> > Patrick
> >
> >
> >