Thread
:
BPL Powers Off
View Single Post
#
6
August 25th 04, 12:08 PM
N2EY
Posts: n/a
In article ,
(Brian Kelly) writes:
(N2EY) wrote in message
...
In article ,
(Brian Kelly) writes:
That means 900 customers can have 6 MHz of bandwidth each. Or maybe 5400
can
have 1 MHz each.
That's with antique satellites, not with the monster birds being
tossed up these days each of which which has orders of magnitude more
capacity than the TV repeaters.
Doesn't matter, they're still limited to the RF spectrum. Of which there is
only one.
There's only one RF spectrum but that doesn't mean that a given
frequency can only have one user. Digital comms satellite operating
frequencies are shared via a bunch of schemes.
To a certain extent. But ultimately there's a very definite limit. You can't
put geostationary satellites just anyplace in the sky, either.
End result is that the total capacity of satellite retransmission is limited.
There's also the transmission delay.
Each fiber is a whole new bunch of unshared spectrum.
Obviously fiber optics is the better choice vs. the satellites *IF*
the cable is in the neighborhood where service is needed. Big if.
Yep. But for bazillions of folks, it is.
It'll be years before optics cables are run into crossroads burgs and
made available for their use as neighborhood Wi-Fi feeds. I've watched
optics cables being run through places like Malvern. Took a tech
working in an air-conditioned mobile lab a full day to make and test a
single 1 1/2 inch splice.
When was this? Things have improved somewhat.
Which did not incxlude a repeater. Takes one
helluva lot of revenue traffic to justify those kinds of installation
outlays and that's why optics is a non-answer today except as
long-haul and/or enormous volume data pipes. Fiber optics cables are
cheaper and can provide more bandwidth than the old AT&T & Ma Bell
microwave systems and that's about as far as they've taken the optics
cables so far.
In the meanwhile back at the ranch the sattelites are already up and
running . .
Sure. And they'll play a role.
But as a general-purpose solution, fiber will dominate. In fact, it already
does. Satellite broadband comms will always be a supplement.
What "ducts"?? There aren't any ducts running into farms and vacation
lodges out in the boonies. They'll have the last mile problem for
years to come. Until the phone companies replace their twisted-pair
wiring with cable, fiber optic and otherwise.
I meant ducts that carry it to within a mile of the customer.
Many people in this country live twenty and more miles from anything
even vaguely resembling a cable. Wi-fi is never gonna reach them.
You'd be surprised at some of the boonie places that have Wi-Fi.
Like that remote village in Nepal which gets it's broadband feed from
a satellite . . ?
Sure!
What's a "duct" anyway?
A pipe you can pull cable(s) and/or fiber(s) through. Usually installed
along various rights-of-way, such as interstate highways.
How many of those are running all over North
Dakota and Idaho??
More than you might suspect.
I doubt it. Where's the map?
Not allowed to tell ya!
73 de Jim, N2EY
Reply With Quote
