Date: Sun, 15 Nov 92 23:11:41 CST
From: Cliff Sharp <clifto@indep1.chi.il.us>
Newsgroups: comp.dcom.telecom
Subject: Re: Listing of CLLIs
Organization: TELECOM Digest
X-Submissions-To: telecom@eecs.nwu.edu
X-Administrivia-To: telecom-request@eecs.nwu.edu
X-Telecom-Digest: Volume 12, Issue 848, Message 9 of 10

In article <telecom12.836.9@eecs.nwu.edu> vixen!jadams@uunet.UU.NET
(22475-adams) writes:

> I'm not sure whether having a complete list of Common Language
> Location Identifier codes (CLLI) would be of much help in what you are
> trying to do.  If your user is an average telephone subscriber, he/she

   Actually, I'm cross-referencing one file against another by a
common field (not exactly relational database but similar idea); the
field could just as well contain ABCDEFGH as CHCGILCA but the latter
might come in handy some day.

> would have much difficulty abstracting where they are (either calling
> from or to) from these ten character code names which identify

   There was a list (containing some inaccuracies in NPA/NXX/CO name)
circulating BBSes around here when 312 split, and it contained eight-
letter abbreviations; don't know if it was deliberately letting me
mislead myself, but the RBOC person I mentioned them to seemed to
accept them as at least fairly close to what I thought they were; cf.
CHCGILCA above, listed as one of three CLLIs for the Canal CO.

> physical locations within the telephone companies.  For instance, in a

   I was told the other day that they not only identify physical
locations, but also are used to identify which switch in a given
office the NXX is connected to ... that would be interesting stuff to
me if I could pin it down.

> given town, there probably are more than one physical location for the
> phone company (Chicago and other towns come to mind).  More
> importantly, these locations are often encoded with streets and/or
> other less widely recognized designators. 

   In that (probably inaccurate) list I had, every CO in the City of
Chicago began with CHCGIL, and the suburban ones had abbreviations
that roughly allowed them to be matched to village names.

> I suspect that correlating an NPA-NXX with LaSalle Street might be a
> stretch for the average customer.  In addition, not all CLLIs have End

   Ah, but TEYE, in my laBOratory, am not your average customer...!

[evil scientist grin]

> Offices in them, a digital radio relay CEV (Controlled Environment
> Vault) or other type of hut are CLLI designated but have no NPA/NXX
> associated with them.

  Didn't know that!  Wonder if that figures in their distance
measurements for measured service (I can see where the distance from a
CEV wouldn't count on per-minute cellular charges, but ...)?

> Moreover, the CLLIs are often assigned to buildings with no networks
> in them whatsover. Consider the warehouses which hold the spare plug
> in electronic equipment units, but which bear a CLLI because they
> contain these Common Language Equipment Identification (CLEI) items.

   So far, against the list I've had and the list I've maintained by
hand from Illinois Bell's MSA-1 list, I've at least managed to
identify the COs; with a little luck I might be able to cull the
others.

> I suspect that a search of your tariffs (publicly available) will be
> of more value in completing your project as they fully designate all
> rates, routes, etc.

   I would dearly love that, but (1) some service rep told me that
they no longer keep a copy of the Illinois tariffs available for the
public (!!! I thought they were required to, and suspect this is
stonewalling), (2) The ICC will xerox this tome for me for $0.25/page
(probably a few tens of bux I can't afford), and (3) my bad back would
keep me from travelling very far or sitting very long to read it
anyway.  And to top that, my handwriting is bad enough after a few
minutes of writer's cramp that even I wouldn't be able to decipher my
own scrawl.

> Maybe I'm missing something?

   Right on target so far, thanks.


Cliff Sharp   clifto@indep1.chi.il.us   OR  clifto@indep1.uucp   WA9PDM 


[Moderator's Note: The tariffs are available to the public. Go to
the 225 West Randolph / 212 West Washington Building downtown.  PAT]