Michael Sokolov wrote:
Frank Bulk - iName.com <frnkblk@iname.com> wrote:
We offer it, but practically speaking we haven't gotten much higher than 1.5 Mbps on the upstream.
Sorry that I'm coming into this thread late (I have just subscribed), but since I see people discussing DSL with beefy upstream, I thought I would be brave and ask: do you esteemed high-end network op folks think that there may be anyone in the world who might be interested in bonded SDSL or not?
I have spent the past 5 years of my life learning everything there is to know about SDSL. Don't ask me why, I don't really know the answer to that question myself. I won't waste the bandwidth of this elite list with dirty details of just what I've done with SDSL over the past 5 y, but I'll give a link to an open source project that contains the body of SDSL knowledge amassed over those years:
Michael, I'm but a small humble ISP. We have sold SDSL since ~1996. The bonded circuits have been terminated differently over the years, but I still have a fair number of business clients that have SP supplied CPE that is extremely affordable, and that require little to no work on our part. Other than a few stragglers that I keep afloat on SDSL that require fail-over, I've been trying to get rid of the dedicated copper as much as possible, since I 'lease' the copper for the dry circuit(s). We've reached past the break-even point for fibre access within our area, and am at the point where the *very* 'ritzy' resi clients can and will soon be approached. The max length of SDSL that I currently have is 6.7 wired km. Bonded, our longest distance is 5.4 km. Peak throughput over our longest bonded (2 pair) SDSL circuit is 2.25Mb. Given relative average, in the locations that I can provide optics, there is a gain of revenue percentage that I achieve over standard copper SDSL. IOW, when revenue for a bonded SDSL circuit is $285 and I pay $49.40 per circuit for the four wire copper, things begin to look more attractive when I pay *nothing* for the dark fibre, but am able to provide multiple times the bandwidth at the same price to the client ;) fwiw, for bonded SDSL, we have currently: - Symmetric GoWide units deployed (both on the PE and CPE) that inherently manage two-pair which requires but one switch port and no configuration. Aggregates internally. - an 'Elastic' rack that requires a bit more setup on both ends. Terminate into a vlan on a switch to aggregate properly. A 'setup' fee covers this one-time fix. Remember, small ISP, I'm not used to scaling human resources ;) - multiple other stand-alone SDSL modem types (dslam/non-dslam, such as PairGain etc) - Copper Mountain BTW, while on topic, if you know anyone who wants a fully shelved and carded Copper Mountain CE200 dslam w/ dual power supplies, let me know ;) Steve