Hi Everyone,
In response to your inquiry about the Demarc.
First, the demarc is the point of termination for the LEC (Local
Exchange Carrier).
As far as a 'zone', that term must be a local anomaly. I have been
in the
telco world for 25 years and have never heard it referred to as a
'zone'.
DMZ is and has been referred to as the demarc too. Although the term
has been
a little vague, it generally means the place where there is an
electrical separation
between telco's network and your network. In other words, if telco
needs to come
in and do some work they can separate your network from theirs at
the demarc.
That is why it is difficult to get telco to admit to problems when
they test 'clean'
to the demarc. There is the back half of the demarc. in most cases,
that can and
does cause many a problem.
Any extended demarc, to get it from the demarc to the router, is
guaranteed for
30 days after installation. If you have problems, as Jason stated
below, you will
need to ask the LEC to test from the extended demarc too. They will
tell you that
there will be extra charges, and any repairs needed to the extended
demarc will be
time, materials, and a hourly fee too.
A LEC is a company like Bell South, Ameritech, Verizon, etc...
Hope this helps,
Darel Graham
p.s. Jason - in other countries the LEC owns everything including
the CSU/DSU.
My counterparts in Amsterdam (they monitor/install
ckts in Europe)
say they call it a demarc too.
-----Original Message-----
From: Jason Roysdon [mailto:[EMAIL PROTECTED]]
Sent: Monday, May 14, 2001 4:23 AM
To: [EMAIL PROTECTED]
Subject: Re: What is demarc zone? [7:3576]
It all depends, of course. I always request to have the demarc extended for
my router installs. If there are problems with layer 1, I swap my patch
cable and CSU/DSU or WIC, and if it persists (or I should say when it
persists), I tell the customer it's a telco problem and call the telco on
the way to my car.
As discussed before, the demarc is the point of where responsibility goes
from one to the other, but it's usually associated with the PSTN or Public
Telephone Company. The problem with extending wiring beyond the demarc is
that if there is any doubt or question, the telco will try and blame it on
your wiring. If the wiring, jack, etc., is all before the demarc, they have
to fix it (even if it was originally the customer's wiring).
>From the way I understand it, demarcation goes back to deregulation. I'm
curious if the same term is used outside the US? Basically, before
deregulation the telco did everything, including the inside telco wiring and
even the phones. With deregulation, they started demarcation to establish
the point to which the telco was responsible and where the customer was.
--
Jason Roysdon, CCNP+Security/CCDP, MCSE, CNA, Network+, A+
List email: [EMAIL PROTECTED]
Homepage: http://jason.artoo.net/
""Sam"" wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> This demarc for a data line is usually a closet or server room and not the
> MPOE (minimum point of entry). Usually the telcos call the MPOE the
demarc
> for voice lines.
>
> ""Subba Rao"" wrote in message
> [EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> > Hi,
> >
> > I am still new to Cisco networking. While touring a network facility,
one
> of
> > the network engineer's showed a telecom closet and said it is the
"demarc
> > zone".
> > I heard DMZ a lot (but I could swear I heard "demarc zone too).
> >
> > What is "demarc zone" in networking?
> >
> > Thank you in advance.
> > --
> >
> > Subba Rao
> > [EMAIL PROTECTED]
> > http://members.home.net/subba9/
> >
> > GPG public key ID 27FC9217
> > FAQ, list archives, and subscription info:
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> FAQ, list archives, and subscription info:
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> Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
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