Newsgroups: sfnet.tietoliikenne.yhteydentarjoajat
Subject: Re: Supernopea laajakaista kaasulinjaa my�den!
References:    
"rn"  writes:

> Jari Lehtonen wrote:
> > On Mon, 16 May 2005 13:28:59 GMT, "NN"  wrote:
> >
> >> Varmaan sit� jo suunnitellaan internetin kytkemist�
> >> viem�riverkkoonkin.
> >
> > T�ss�h�n mainio idea, viem�ri tulee jo melkein joka talouteen!
> >
> Tulee heti mieleen kuidun vieminen my�s vesijohtoverkon kautta. :)
> Asuntoihin asti 10 mm putkiin teht�v� j�lkiasennus voi kyll� olla
> haastavaa. Kest��k�h�n kuitu jatkuvaa vedess� oloa?.


Kyll� on olemassa kuituja jotka kest�� jatkuvaa vedess� oloa 
oikein hyvin. Maailman merien pohjaan on vedetty aikamoisen 
paljon tuota valokuitua kuljettamaan telemaailman signaaleita 
maasta toiseen. 

Muistelen ett� joku olisi tuota vesijohtoputkikuitusysteemi� 
kokeillut ja mainostanut sellaisen olevan mahdollinen
(URL:lia tai artikkelilinkki� ei mieless� nyt). 
Muistelen ett� yhdess� ratkaisussa k�yttett�isiin jotain 
erikoisrobottia, joka kulkee viem�riputkessa, puhdistaa 
putken ainakin yhdelt� reunalta ja kiinnitt�� puhdistettuun 
alueeseen muovinauhan josssa sis�ll� tuo valokuitu.


Jotain v�gh�n t�h�n suuntaan olevia virityksi� joita 
tuli eteen nopealla Google haulla:

Alternative rights of way enable metro/access deployments 
http://lw.pennnet.com/Articles/Article_Display.cfm?Section=Articles&Subsection=Display&ARTICLE_ID=120252

Corning to Showcase Advanced Fibers
http://www.lightreading.com/document.asp?doc_id=16715&site=supercomm
"MCS Drain and S.L.I.M.� cables use city sewers to get fiber to
customers. MCS Drain Cable features a unique single tube cable design
with special armor and protection for sewer installation. It is
installed in sewer systems using Corning Cable Systems. proprietary
technology."

The Last Mile. 
http://www.astm.org/SNEWS/AUGUST_2002/jeyapalan_aug02.html
"So it makes sense for either telecommunications companies, utilities,
or city-owned telecom carriers to lease space in existing sewers and
natural gas pipes for the laying of optical-fiber cables."
"There are at least five robot companies, namely: CableRunner,
DTI-CableCat, Ka-te, Nippon Hume, and RCC. CableRunner uses a
drill-and-dowel system in sewers of 250 to 700 mm in
size. DTI-CableCat uses either a back-reamed anchor or an adhesive bed
system in sewers of sizes 200 to 1200 mm, while Nippon-Hume and RCC
use drill-and-dowel systems for the same sized sewers. Nippon-Hume
uses a plunger pin stem for the anchor along with a two-part resin
system while RCC uses a frictional stem anchor. Ka-te uses a stainless
steel clamp and conduit system for sewers of sizes 200 to 700 mm."
"In the drill-and-dowel system, a drill hole is made into the upper
part of the sewer pipe wall and the cable is attached using either an
anchor or a cable tray. In the adhesive bed system, the sewer pipe
surface is coated with a glue and either the cable is directly
attached or fitted into either trays or clips attached to the glue
bed. In the clamp-and-conduit system, stainless steel rings are fitted
inside the pipe where the stainless steel conduits to house the
optical fiber cables are clipped."

Turning Money Pits Into Money Makers: The Municipal Value Prop 
http://www.corning.com/opticalfiber/guidelines_magazine/eguidelines/vol1/a2_03_moneymakers.aspx
"With Renaissance's solution, municipalities can deploy two systems
for the cost of one, rehabilitating their existing sewer system to
meet EPA requirements while simultaneously creating a brand new
revenue source . a fiber-optic network they can lease to carriers . to
pay for a portion, possibly all, of the rehabilitation."


-- 
Tomi Engdahl (http://www.iki.fi/then/)
Take a look at my electronics web links and documents at 
http://www.epanorama.net/