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- Path: sparky!uunet!zaphod.mps.ohio-state.edu!news.acns.nwu.edu!telecom-request
- Date: Mon, 28 Dec 92 11:51 GMT
- From: Richard Cox <mandarin@cix.compulink.co.uk>
- Newsgroups: comp.dcom.telecom
- Subject: Demarcs and Shared Wiring
- Reply-To: mandarin@cix.compulink.co.uk
- Message-ID: <telecom12.924.7@eecs.nwu.edu>
- Organization: TELECOM Digest
- Sender: Telecom@eecs.nwu.edu
- Approved: Telecom@eecs.nwu.edu
- X-Submissions-To: telecom@eecs.nwu.edu
- X-Administrivia-To: telecom-request@eecs.nwu.edu
- X-Telecom-Digest: Volume 12, Issue 924, Message 7 of 11
- Lines: 61
-
- I was intrigued by some of Pat's comments on the cost of installing
- new lines.
-
- Commenting on a posting by mrosen@nyx.cs.du.edu (Michael Rosen), Pat
- said:
-
- > try it yourself in an older highrise with a real messy demarc and
- > hundreds or thousands of house pairs to deal with and you'll wish
- > you'd spent the $75, believe me you.
-
- Over here we are not allowed to have any other service in the same
- cable as an exchange pair, downstream of the demarc (which we call an
- NTTP - Network Test and Termination Point). Having more than one
- customer's services in a single cable (which the telco does not
- manage) seems to open up a large can of worms/possibilities of
- maintenance conflict, fraud, etc.
-
- How did this situation come about in the US? Are there any proposals
- to "regulate" it?
-
-
- Richard D G Cox
-
- Mandarin Technology, Cardiff Business Park, Llanishen, CARDIFF, Wales CF4 5WF
- Voice: +44 222 747111 Fax: +44 222 711111 VoiceMail: +44 399 870101
- E-mail: mandarin@cix.compulink.co.uk Not diallable on 511 in mainland USA
-
-
- [Moderator's Note: In the USA, much of the wiring goes back to long
- before divestiture -- when there was but a single Mother Company, and
- who cared? Lots of demarcs and the 'house pairs' from them are fifty
- years old or more. Example: A building nearby, whose basement I am
- familiar with has a demarc with four hundred house pairs and about
- three hundred pairs coming in from the CO to serve the two hundred or
- so apartments in the (thirty story) building, constructed in 1927.
- When new service is requested, if telco records do not show a CO pair
- which has been wired 'straight through' to a house pair and then to
- the apartment, a technician comes out, locates the assigned CO pair on
- one side of the demarc and punches it down on the other side where the
- house pairs terminate. Sometimes telco records say the pair is already
- wired through and the tenant's phone still does not work so the tech
- has to come out. All the pairs from the CO are multipled; that is they
- show up on the demarcs of other buildings nearby. A certain number of
- house pairs are also multipled in such a way that a tenant who wants a
- second line may wind up getting a house pair that previously had
- served as a line for another apartment. Some house pairs are multipled
- between the 'local demarcs' located on each floor of the building in a
- janitor's closet.
-
- Records kept at the demarc are notoriously out of date and frequently
- inaccurate. In the building I am speaking of now, one punchdown block
- with fifty pairs on it sits sort of apart from the rest and has a
- penciled note written on the wooden backboard: "This fifty pairs is
- multipled to the new building across the street." (signed) J. Gordon,
- May 12, 1936 ... and another note, apparently by the same long-
- forgotten probably dead 'J. Gordon' says "Rogers cable 95 went open
- and I took five pairs from here for the switchboard." Not only that,
- but when you take the big wooden doors off the demarc cabinets, dust
- and cob-webs greet you, and cockroaches scurry away to hide. PAT]
-
-