Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!accuvax.nwu.edu!nucsrl!telecom-request From: David Lewis Newsgroups: comp.dcom.telecom Subject: Re: Caller*ID and *69 Message-ID: <1811@accuvax.nwu.edu> Date: 4 Dec 89 18:55:53 GMT Sender: news@accuvax.nwu.edu Organization: Bellcore, Livingston, NJ Lines: 57 Approved: Telecom@eecs.nwu.edu X-Submissions-To: telecom@eecs.nwu.edu X-Administrivia-To: telecom-request@eecs.nwu.edu X-Telecom-Digest: Volume 9, Issue 552, message 3 of 7 In article <1758@accuvax.nwu.edu>, Dave_C_Henry@cup.portal.com writes: > I heard today that Bell of PA is now offering the Caller*ID feature ... > I have a few questions first: > 1) What areas do the incoming calls have to come from for the number > to be displayed? Do they have to be local, from within PA, from an > area that also has Caller*ID, or will every number show up? What about > long distance numbers? I get most of my calls from Baltimore, > Pittsburgh and Boston. I'm in Philadelphia. (sigh). I really oughta put this in a file and just copy it when the question comes up... (but will I? Probably not...) For Caller*ID information to be displayed, assuming you have subscribed to Caller*ID and have the Caller*ID box (and therefore your CO is equipped with the appropriate hardware and software), one of the following must be true: 1. The caller must be calling from a phone subtending the same CO you do; 2. The caller must be calling from a phone subtending a CO which is equipped with SS7 (common channel signaling system #7), which is in the same LATA as your CO. (At some time in the future (beyond 1991), when Interexchange Carrier SS7 interconnection is available, add:) 3. The caller must be calling from a phone subtending a CO which is equipped with SS7, run by a telco which has SS7 connectivity with the caller's IC, which has SS7 connectivity at the appropriate tandem switches, and has SS7 connectivity to your telco. Simple, hey? In practical terms: Today, you would get the calling number from calls inside your LATA (in the philly area, generally local calls), from COs which are SS7-connected (not intuitively obvious which are, but generally some reasonably high percentage of "major" COs in the LATA will be SS7-connected before a telco will offer CLASS). You would not get calling number from Pittsburgh, Baltimore, or Boston. At some point in the future -- but not before mid-1991, most likely -- you would start getting some calling number delivery from outside your LATA. There are so many variables involved that I won't even *try* to predict where you would and would not get delivery.... save to say that Pittsburgh would be your best bet (Bell of PA), followed by Baltimore (C&P of Maryland, different telco but part of Bell Atlantic) followed by Boston (different Regional Company -- NYNEX). David G Lewis ...!bellcore!nvuxr!deej (@ Bellcore Navesink Research & Engineering Center) "If this is paradise, I wish I had a lawnmower."