[187765] in North American Network Operators' Group
Re: Standard terminology for a dark fiber path?
daemon@ATHENA.MIT.EDU (Dave Cohen)
Thu Feb 25 20:51:30 2016
X-Original-To: nanog@nanog.org
In-Reply-To: <CAHDg04sCEjHvT8vM_2P50c1vmXQUrJz2UOrjMz_tiRRzOKicsw@mail.gmail.com>
From: Dave Cohen <craetdave@gmail.com>
Date: Thu, 25 Feb 2016 20:32:28 -0500
To: Michael Loftis <mloftis@wgops.com>
Cc: Fletcher Kittredge <fkittred@gwi.net>, NANOG list <nanog@nanog.org>
Errors-To: nanog-bounces@nanog.org
FWIW, at my $dayjob (a fiber-based service provider), the accepted term is
"span", which accounts for any continuous segment between add/drop and/or
regen locations (i.e. no provider or end user electronics in the middle,
only at the endpoints). The most common alternate I come across is
"segment".
Re a couple of earlier suggestions - A patch between cables to provide
continuity, as compared to a fusion splice, doesn't inherently change this
view, as it has no bearing on the logical use of the span. Similarly,
"strand" isn't favored as it assumes a single fiber only, where the vast
majority of applications require a pair (or multiple pairs), so doesn't
accurately reflect the logical use of the span. I think "1F Span" is the
favored reference for a single-fiber deployment, for the sake of both
consistency and clarity.
On Thu, Feb 25, 2016 at 6:27 PM, Michael Loftis <mloftis@wgops.com> wrote:
> IDK what elsewhere uses but strand or (less common) span is the common
> term I've seen specifically for a passive piece of glass between two
> points.
>
> On Wed, Feb 24, 2016 at 12:55 PM, Fletcher Kittredge <fkittred@gwi.net>
> wrote:
> > What is the standard terminology for strands of dark fiber spliced
> together
> > to form a continuous path between points A and Z?
> >
> > I have seen:
> >
> > - *fiber circuit* [but also seen used to denote a connection at the
> > network layer over a physical fiber connection. This definition of
> circuit
> > would include the dark fiber path, the transmitters and receivers and
> logic
> > making up the data and network layers.]
> > - *fiber loop *[ Does a loop define an electrical circuit with two
> > physically separate positive and negative strands? In that case, is
> this a
> > Bellhead remnant? ]
> >
> > I am particularly interested in last mile systems, but I don't see any
> > reason that the term wouldn't be the same in the middle mile.
> >
> > thanks,
> > Fletcher
> >
> > --
> > Fletcher Kittredge
> > GWI
> > 8 Pomerleau Street
> > Biddeford, ME 04005-9457
> > 207-602-1134
>
>
>
> --
>
> "Genius might be described as a supreme capacity for getting its possessors
> into trouble of all kinds."
> -- Samuel Butler
>
--
- Dave Cohen
eM: craetdave@gmail.com
AIM: dCo says
