From: Dave Airlie (david.airlie at domain ul.ie)
Date: Fri 14 May 1999 - 17:31:20 IST
> I understand that most leased lines are frame rely and X25.
> I don't think ATM has been deployed anywhere much in Ireland.
> EXCEPT in maybe CIT (Cork RTC) where there is a ATM test bed set up in
> conjunction with TE (I think Aiden McDonald is they dude doing all that down
> There was an article in that TE Magazine Recently (what's in called?) about
> it I think.
I currently have a 34MB ATM link from TE sitting in my research centre
lying idle, we were trying to get a link between our research lab and
Tellabs in Shannon, and also access to the European ATM test network,
One day I decided to get the link going ... (it's never really worked),
and I mailed the TE contact, who after a couple of days realised someone
had put the R&D switch that was in the Castletroy exchange into a box as
it was in the way of something else,
Orignally the link was down, and after 2 mths I got TE to admit it was
there fault, they contacted the exchange and the guy plugged the found out
that the fibre going to the switch was slightly damaged ...
So if TE couldn't run proper trials I'd hate to see them role it out, also
I think one of the dublin unis have an ATM link to the HEAnet now ..
> Some one please enlight us (or correct the error pf my ways)
> I find out some more about this over the weekend and report back on Monday
> !! :)
> (Have a good weekend folks !!)
> Sorry i did receipt again on my imac mail opps !!)
> -----Original Message-----
> From: Paul Jakma [mailto:paul at domain clubi.ie]
> Sent: 14 May 1999 16:29
> To: Roy White
> Cc: 'Paul Curtayne'; ILUG
> Subject: RE: [ILUG] OT: read and puke
> On Fri, 14 May 1999, Roy White wrote:
> It basically means, how many other people, companies, entities are using
> the line.
> in dublin the contention is about 4:1 i.e. 3 other people are usuing as
> well as yourself.
> MCI worldcomm offer a 1:1 contention ratio, but that works out at about
> 29K per year.
> for 512K line not too sure about 128K?
> they are the only people who do it, if you push stentor they might as
> well. I am led
> to believe that contention is a serious thing to consider in factoring
> price of lines,
> but i'm no expert.
> How are leased lines implemented in this country? Frame relay over
> fractional T line, or ATM over T line? If contention is a possibility
> then it must be ATM right? (frame relay is circuit-switched.. no
> (or have i got it all backwards and in need of re-reading T.baum's
> "computer networks"?) :)
-- ------------ David Airlie, David.Airlie at domain ul.ie,airlied at domain skynet -------- Telecommunications Research Centre, ECE Dept, University of Limerick \ http://www.csn.ul.ie/~airlied -- Telecommunications Researcher \ --- TEL: +353-61-202695 -----------------------------------------------
This archive was generated by hypermail 2.1.6 : Thu 06 Feb 2003 - 13:04:12 GMT