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).