Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!mnetor!seismo!lll-lcc!ptsfa!well!rab
From: rab@well.UUCP (Bob Bickford)
Newsgroups: comp.dcom.modems
Subject: Re: What number am I calling from?
Message-ID: <2285@well.UUCP>
Date: Wed, 31-Dec-86 04:54:10 EST
Article-I.D.: well.2285
Posted: Wed Dec 31 04:54:10 1986
Date-Received: Wed, 31-Dec-86 18:40:18 EST
References: <750@sdcc12.ucsd.EDU> <1706@sunybcs.UUCP> <722@cooper.UUCP> <1502@kitty.UUCP>
Distribution: na
Organization: Whole Earth Lectronic Link, Sausalito, CA
Lines: 35

In a previous article Larry Lippman writes:
> 	Well, I guess I have to spell it out...  The availability of ANAC
> at any outside plant location (like cross-connect terminal) is of significant
> value to anyone bent upon unlawful wiretapping.  Telephone company security
> personnel are always concerned about unauthorized persons obtaining any
> information with respect to subscriber line pair identity and circuit
> routing.  In fact, in New York State it is a specific criminal offense
> (Penal Law 250.30) for an "unauthorized" person to obtain "information
> concerning identification or location of any wires, cables, lines, terminals
> or other apparatus used in furnishing telephone or telegraph service".

  Well, here I am with mud on my face.  That *is* just a bit obvious...
Listen, and I particularly direct this to the silent readers out there,
whether or not it is illegal, using this information in this way is
quite clearly wrong.  I know there are laws in California against
using telephone equipment to commit a prank, AND there are laws against
tapping people's phones.  Don't do it.  If you use this info, it
had better be for a legitimate reason, and it would help a great deal
if you know what you're doing.




> 	Interestingly enough, the milliwatt reference frequency has been
> changed in some areas to 1,004 Hz because of small measurement errors which
> occur when measuring through PCM (i.e., digital) CO's or transmission
> (T-carrier) facilities.  The reason is that 1,000 Hz is an even divisor of
> the 8,000 Hz PCM sampling rate, and any frequency within say 1 Hz of 1,000
> Hz exhibits erratic results (to a minor degree, however) during measurement.
 
  I knew this; the assumption I was making (which I gather was invalid)
was that almost all of the country had switched.  I do know that none
of our field service people complained of the meter reading 1000 instead
of 1004; but perhaps they thought it didn't matter (which I guess it
doesn't).