the limitation is of the "ADSL" called technology not some local bezeq wiring
and isp's make up for the asymmetry with hosting services, so they arent
interested in you using their upload either.
On Tuesday 15 October 2002 17:45, Nadav Har'El wrote:
> On Tue, Oct 15, 2002, Barak Kaufman wrote about "Re: Reverse ADSL?":
> > this is technologically impossible
> > ADSL is max 8Mbit download and 700somethin upload
>
> This is just a detail of frequency allocation - they could have easily
> made it the other way around. I'm not sure, however, if it's possible
> to get modems that are "wired" the other way - I never tried.
>
> Bezek has an obvious incentive not to offer such a service (namely, their
> more expensive connectivity solutions), but since Bezek is a monopoly, it
> is not actually their decision to make. If you want to make waves about
> this, the ministry of communications is probably the correct address.
>
> ISPs traditionally have an opposite incentive, to allow you to reverse
> the direction of the asymmetry, because it will allow them to better
> fill their connections and to get better peering deals. Also,
> traditionally, servers in Israel usually catered to Israelis while clients
> use a lot of bandwidth to abroad, so it is cheaper for them to host a
> server than a client using the same bandwidth.
>
> I'm not sure what the ISPs' incentives are nowadays, however. Nowadays,
> everybody and their uncle runs some sort of P2P network; With the normal
> ADSL assymetry, your node (I'm assuming gnutella-like things, not freenet,
> for a moment) mostly uses the high bandwidth when you've specifically
> requested for something (when someone downloads from you, he or she will
> get the measly upstream bandwidth). They can usually assume that you don't
> sit 24/7 choosing stuff to download.
> However, if you have a "server" connection (ADSL assymetry reversed), the
> wide connection can get fully used by people from all over the world using
> your node without any of your participation. Worse, in Gnutella (and
> perhaps other similar networks), the network "learns" about such
> well-connected nodes and makes sure they get used to their full potential
> (I think this sort of "leaching" is a serious design issue with Gnutella).
>
> ISPs can get around this dilemma by giving you a virtually infinite burst
> bandwidth (e.g., like happens when your machine is hosted inside the ISP's
> server room), but somehow limiting the total average bandwidth per month,
> or charging extra for extra bandwidth. Some American ISPs already do that.
--
Barak Kaufman
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