Eircom told us that there was a fault in their SDH transmission, which
may or may not be true. In any event, their NTU at Marine House had failed
and this was evident from the LEDs on the front panel. It took them some
time to determine the locus of this failure, as they proceeded serially
through their procedures and faults encountered, and because the fault on
the NTU had the consequence of denying them access to the system's
Once the on-site cause was diagnosed, the Eircom engineer took considerable
pains and time outside his rota to locate a replacement item. While
the person in question, we have asked to meet with Eircom to analyse the
fault and to seek resilience commensurate with the cost and level
of technology of their ATM service.
> -----Original Message-----
> From: HEAnet fault reports and trouble tickets
> [mailto:[log in to unmask]]On Behalf Of Fergal Suipeil
> Sent: Thursday, December 16, 1999 2:37 PM
> To: [log in to unmask]
> Subject: Re: TICKET HEA-NOC/19991215-01 UPDATE
> On Wed, 15 Dec 1999, Dave Wilson wrote:
> > Power problems at Marine House led to the failure of some Eircom
> > equipment that connects us to the Symphony ATM network.
> Were there actually any power problems? I've lost track of the
> sequence of events, apart from the fact that from UCD's point of view
> we were cut off for about 12 hours on Wednesday from 12:00 to 00:00.
> Also, have Eircom revealed exactly what the problem was and how it
> was fixed? Is their equipment unreliable or is it just them?
> P.S. Thanks to Dave and others in HEAnet for getting this
> resolved out of hours. At least it's not a thankless task :-)
> P.P.S. The circuit between UCD and TCD worked fine thoughout. I'd like
> to know how our circuits relate to the underlying SDH topology.