"Bill Sohl" wrote in message hlink.net...
"N2EY" wrote in message
...
In article . net, "KØHB"
writes:

"N2EY" wrote



But in fact, the mode used in practically all fiber optic
communications
is
simple on-off keying of a "carrier".

Very similar, in fact, to landwire telegraph practice, speeded up and
automated, and using photons instead of electrons.

Jim, your credibility is fast evaporating!!!!!! This is the most wildly
stretched and tortured analogy to hit rrap since FOREVER!

How so?

The old original landwire telegraph used a single (usually iron) wire and
on-off keying of an electric current. Fiber optics uses a glass fiber and
on-off keying of an beam of light, usually from a laser. Both sent
messages by
time-domain multiplexing.

Actually, in really high speed optical equipment it is both
time domain and wavelengths/frequency (sometimes called color) domains.

Multiple "carriers" (different light wavelengths) on the same fiber,
right? Kinda like multiple telegraph carriers of old.

But isn't the basic modulation scheme still on-off keying of the
light, rather than shifting its color or phase?

There is equipment out there that operates at 1.6 Terrabits/sec.

lessee...10^12 bits/second...that's more than all of the RF spectrum
normally used for radio, right? And that's through *one* fiber that's
immune to EM fields, weather, ionospheric and tropospheric
propagation, EMI and almost everything else except shovels.

Now that's cool.

But it does have a downside. It permits a significant number of US
jobs to be outsourced to places like India (or anywhere else that has
a significant English-speaking population).

73 de Jim, N2EY

(N2EY) wrote in message . com...


lessee...10^12 bits/second...that's more than all of the RF spectrum
normally used for radio, right? And that's through *one* fiber that's
immune to EM fields, weather, ionospheric and tropospheric
propagation, EMI and almost everything else except shovels.

Now that's cool.

But it does have a downside. It permits a significant number of US
jobs to be outsourced to places like India (or anywhere else that has
a significant English-speaking population).

73 de Jim, N2EY

Even engineering jobs.

Since 9/11, is Congress still letting in 250,000 foreign engineers
each year, or are they just piped in via fiber optics?

"N2EY" wrote in message
om...
"Bill Sohl" wrote in message
hlink.net...
"N2EY" wrote in message
...
In article . net,
"KØHB"
writes:

"N2EY" wrote



But in fact, the mode used in practically all fiber optic
communications
is
simple on-off keying of a "carrier".

Very similar, in fact, to landwire telegraph practice, speeded up
and
automated, and using photons instead of electrons.

Jim, your credibility is fast evaporating!!!!!! This is the most
wildly
stretched and tortured analogy to hit rrap since FOREVER!

How so?

The old original landwire telegraph used a single (usually iron) wire
and
on-off keying of an electric current. Fiber optics uses a glass fiber
and
on-off keying of an beam of light, usually from a laser. Both sent
messages by
time-domain multiplexing.

Actually, in really high speed optical equipment it is both
time domain and wavelengths/frequency (sometimes called color) domains.

Multiple "carriers" (different light wavelengths) on the same fiber,
right? Kinda like multiple telegraph carriers of old.

But isn't the basic modulation scheme still on-off keying of the
light, rather than shifting its color or phase?

Yes. I wasn't disputing that point, just noting that the on/off time domain
muxing isn't the only way that increased data rates are obtained.

There is equipment out there that operates at 1.6 Terrabits/sec.

lessee...10^12 bits/second...that's more than all of the RF spectrum
normally used for radio, right? And that's through *one* fiber that's
immune to EM fields, weather, ionospheric and tropospheric
propagation, EMI and almost everything else except shovels.

Now that's cool.

But it does have a downside. It permits a significant number of US
jobs to be outsourced to places like India (or anywhere else that has
a significant English-speaking population).

New technology almost always has a downside for some group or groups.
Would you rather such advances not become reality?

Cheers,
Bill K2UNK

New technology almost always has a downside for some group or groups.
Would you rather such advances not become reality?


No.. but how will we all pay for new toys if we are on the bread lines or
slicing baloney at Stop & Shop for a living ?

"Steve Stone" wrote in message
...

New technology almost always has a downside for some group or groups.
Would you rather such advances not become reality?


No.. but how will we all pay for new toys if we are on the bread lines or
slicing baloney at Stop & Shop for a living ?

The point is that any industry is always at risk. There is no
guarnteed life expectancy for almost any endeaver. The PC has
knocked down the number of secretaries needed to support
engineering groups. The auto all but eliminated blacksmiths.

Cheers,
Bill K2UNK

"Bill Sohl" wrote in message
link.net...

"Steve Stone" wrote in message
...

New technology almost always has a downside for some group or groups.
Would you rather such advances not become reality?


No.. but how will we all pay for new toys if we are on the bread lines
or
slicing baloney at Stop & Shop for a living ?

The point is that any industry is always at risk. There is no
guarnteed life expectancy for almost any endeaver. The PC has
knocked down the number of secretaries needed to support
engineering groups. The auto all but eliminated blacksmiths.

Cheers,
Bill K2UNK

But each also created new work. If the worker was smart enough to see it
coming, they started preparing for the new application before it totally
killed off the old. We may not have blacksmiths but the body shops keep
pretty busy.

Dee D. Flint, N8UZE

On Sat, 08 Nov 2003 15:16:15 GMT, Bill Sohl wrote:

The point is that any industry is always at risk. There is no
guarnteed life expectancy for almost any endeaver. The PC has
knocked down the number of secretaries needed to support
engineering groups.

And created an equal demand for CAD operators who also replaced
drafters.

The auto all but eliminated blacksmiths.

And created an equal demand for "mechanics" who today are called
"technicians".

Same folks doing the same work......

--
73 de K2ASP - Phil Kane

From a Clearing in the Silicon Forest
Beaverton (Washington County) Oregon

In article , "Phil Kane"
writes:

On Sat, 08 Nov 2003 15:16:15 GMT, Bill Sohl wrote:

The point is that any industry is always at risk. There is no
guarnteed life expectancy for almost any endeaver. The PC has
knocked down the number of secretaries needed to support
engineering groups.

And created an equal demand for CAD operators who also replaced
drafters.

I don't think it's an equal demand. In most cases, a good CAD op can turn out
the same work faster than an equally skilled manual drafter. This is
particularly true if an existing drawing can be modified rather than drawing
from scratch.

When I started in the design office at (undisclosed former employer), all work
was by hand drafting. Now, in that industry, it is all CAD work - even to the
point that the old linen tracings are usually scanned and treated as CAD files.


And that's for plain old 2D electrical/electronic stuff. The mechanical and
architectural folks are the big shots in that department.

The auto all but eliminated blacksmiths.

And created an equal demand for "mechanics" who today are called
"technicians".

Which title they deserve, considering the level of technology they have to take
care of.

73 de Jim, N2EY

In article k.net, "Bill
Sohl" writes:

Actually, in really high speed optical equipment it is both
time domain and wavelengths/frequency (sometimes called color) domains.

Multiple "carriers" (different light wavelengths) on the same fiber,
right? Kinda like multiple telegraph carriers of old.

But isn't the basic modulation scheme still on-off keying of the
light, rather than shifting its color or phase?

Yes. I wasn't disputing that point, just noting that the on/off time domain
muxing isn't the only way that increased data rates are obtained.

Agreed. Just like containerized shipping has revolutionized freight
transportation, fiber optics has revolutionized communications.

There is equipment out there that operates at 1.6 Terrabits/sec.

lessee...10^12 bits/second...that's more than all of the RF spectrum
normally used for radio, right? And that's through *one* fiber that's
immune to EM fields, weather, ionospheric and tropospheric
propagation, EMI and almost everything else except shovels.

Now that's cool.

But it does have a downside. It permits a significant number of US
jobs to be outsourced to places like India (or anywhere else that has
a significant English-speaking population).

New technology almost always has a downside for some group or groups.
Would you rather such advances not become reality?

Not at all - but I'd rather have it that the downsides be explored more
thoroughly *before* they occur.

73 de Jim, N2EY

"N2EY" wrote in message
...
In article k.net, "Bill
Sohl" writes:

SNIP

There is equipment out there that operates at 1.6 Terrabits/sec.

lessee...10^12 bits/second...that's more than all of the RF spectrum
normally used for radio, right? And that's through *one* fiber that's
immune to EM fields, weather, ionospheric and tropospheric
propagation, EMI and almost everything else except shovels.

Now that's cool.

But it does have a downside. It permits a significant number of US
jobs to be outsourced to places like India (or anywhere else that has
a significant English-speaking population).

New technology almost always has a downside for some group or groups.
Would you rather such advances not become reality?

Not at all - but I'd rather have it that the downsides be explored more
thoroughly *before* they occur.

Surely you jest. Some company or person(s) develope a new
technology, invention, whatever...and you expect them to hold off
bringing that new whatever to market so the negative impacts to
other industries, groups, etc can first be studied?

Cheers,
Bill K2UNK