[Hidden-tech] WiredWest needs feedback needed on your telecommunications needs.

[Robert Heller]

At Fri, 03 Jun 2011 21:29:28 -0400 Reva Reck <reva at revareck.com> wrote:

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> Verizon's website lists 3 Fios plans: 15/5 Mbps, 25/25 Mbps, 
> and 50/20 Mbps.  That's megabits per second.
> 
> /Reva Reck/
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> /reva//@//revareck.com/
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> On 6/3/2011 1:56 PM, Dan Nachbar wrote:
> >     ** Be sure to fill out the survey/skills inventory in the member's area.
> >     ** If you did, we all thank you.
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> >
> > On Jun 3, 2011, at 12:57 PM, Reva Reck wrote:
> >
> >>   ... Fios/GPON goes up to 25 meg ...
> > I'm confused ...
> > Do you mean 25 megabits/sec or 25 megabytes/sec (200 megabits/sec)?
> >
> > Usually network transmission speeds are stated in terms of bits/sec but,
> > intuitively, 25 megabits seems much too low for a fiber-optic connection.

The *fiber* itself can handle on the order of 10's of gigibit per sec
data rates (or maybe more), at least in theory, given the wave lengths
in question (eg nanometers).  The *electronics* is more limited,
partitularly given the issues of silicon semiconductor junction
propagation delays/transistor sizes, and LED/Phototransistor switching
speed limitations.  Yes, with the proper higher-end circuits one can
use fiber-optic well up in the gigibit range of speeds and this is used for
dedicated backbone connections.  For 'down the street' fiber-optics,
speeds (at present!) are much slower, with the higher end, something
like 100megbits/sec (10 megabytes/sec) is about where the upper limit
is.

Someday, with quantum computers or something else out of SciFi land, the
fiber can be (and likely be) used for much higher speeds. This is part
of the future-proofness of fiber, as opposed to either wireless or
copper, both of which have clear ceilings, which current technology have
pretty much reached.

> >
> > Dan Nachbar
> >
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-- 
Robert Heller             -- 978-544-6933 / heller at deepsoft.com
Deepwoods Software        -- http://www.deepsoft.com/
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