There is a significant amount of activity in the high-speed access
market right now. ISDN has not lived up to expectations and newer
compression techniques are becoming important players.
Aside from the standard cable modems (with are new applciations for old
technology), the hot item now is ASDL and DHL. Both are high speed new
technology that leverage the exisiting infrastructure. From some of the
reports I have seen, the new technologies (or techniques) allow for
high-speed connections over exisiting wire connections. I have not kept
up with the detailed technical aspects of the emerging technologies. I
am looking forward to additional details about the Sprint offering the
pending competition. To date, Sprint and Bell Atlantic seem to be the
leaders. The other RBOC (Pacific Bell in particular) seem to be
stumbling when it come to providing service to the home user.
If ASDL and DHL work as advertized, specialized equipment and
connections will not be required.
Michael A. Stone wrote:
>
> >With all due respect to Mr. Stone, who has enlightened me on numerous
> >subjects in the past, I think John is correct.
>
> entirely possible.. i've been known to be wrong before. ;-)
>
> as far as i understood S/ADSL, i thought it was primarily an
> endpoint-to-endpoint data transmission technology, roughly like a standard
> modem.. just much faster. i'm pretty sure it has nothing to do with the
> routing, switching, or channel-allocation protocols the telcos use
> internally.
>
> the last time i saw the multi-device/single-line thing offered, it was
> being done with ISDN (which i think the telcos still do use.. but i'll
> agree that it's dead as a consumer technology), as a side-effect of that
> protocol's channel-allocation capacity.
>
> actually, having taken a look at the Sprint press release:
>
> http://www.sprint.com/sprint/press/releases/9806/9806020584.html
>
> and noting that this "ION" system has been designed in cahoots with Cicso,
> i'm guessing that it's a new protocol suite descended from ATM. the
> release specifically states that ION will run on an ATM backbone, and ATM
> also supports channeling. it has a very powerful & flexible channeling
> model, in fact.. much more butch than ISDN's. it defines a channel as a
> logical abstraction, rather than a physical pair of wires like ISDN does.
>
> IIRC, in fact, ATM also uses a master/slave device model to support
> clusters of terminal devices (phones, modems, etc) running through a single
> channel. the press release mentions a partnership between Sprint & Radio
> Shack, which would suggest that this new system will still have a master
> box coming out of the wall. but i do hope they've found a way to put all
> the routing & channeling hardware in a single box, rather than forcing
> everyone to buy ION-compatible phones, faxes, & modems if they want to get
> in on this.
>
> mike stone <[EMAIL PROTECTED]>
>
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--
John Stewart
SUPSHIP San Diego
Information Systems Security Mgr
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