Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!ucsd!ames!henry.jpl.nasa.gov!elroy.jpl.nasa.gov!gryphon!vector!telecom-gateway From: nvuxr!deej@bellcore.bellcore.com (David Lewis) Newsgroups: comp.dcom.telecom Subject: Re: RTD TLAs (Request To Decode Three Letter Acronyms) Message-ID: Date: 8 Sep 89 17:16:32 GMT Sender: news@vector.Dallas.TX.US Organization: Bellcore, Livingston, NJ Lines: 75 Approved: telecom-request@vector.dallas.tx.us X-Submissions-To: telecom@eecs.nwu.edu X-Administrivia-To: telecom-request@vector.dallas.tx.us X-TELECOM-Digest: volume 9, issue 360, message 1 of 7 In article , roy%phri@uunet.uu.net (Roy Smith) writes: > > All the major L.D. carriers who provide 800 service get the number on their > > FGD (directs) or FGB (tandem) lines. Like I said in a previous posting, the > > only time the carrier doesn't get the ANI is on FGC trunks > Time out! I'm usually able to follow the jargonspeak on telecom, > but I think I gotta call for help on this one. I've figured out that FGX > is, I'm pretty sure, Feature Group X, but can somebody tell me what those > feature groups mean? Feature Group (whatever) are various kinds of Interexchange Carrier access arrangements. To quote from my favorite source, "Notes on the BOC Intra-LATA Networks"... (from this day forward to be referred to as "Notes"): Feature Group A: Line-side originating and terminating LATA access for which an originating subscriber dials an assigned telephone number that connects to a specific IC. The IC returns a tone to signal the caller to input additional tone-generated digits of the dialed number. [In English: The IC has a box with a bunch of subscriber lines at each Point of Termination. You call this box to get access to the IC network.] Feature Group B: Trunk-side originating and terminating LATA access for which an originating subscriber dials 950-WXXX, (where W = 0,1 and XXX is the Carrier Access Code), which is translated to a specified XXX carrier trunk group. Optional rotary dial service and ANI may be available. [In English: The IC has a box with a dedicated trunk group at each PoT. You dial 950-WXXX and the switch translates this to the appropriate trunk group, giving you access to the IC network. Used where/when the switch hardware/software is/was unable to provide 10XXX translation.] Feature Group C: Trunk side LATA access for AT&T Communications, generally, on a direct basis between each EO and an AT&T switching system. [Replaced by FGD in most places; I honestly don't know how it worked or what the details of it were.] Feature Group D: Also referred to as "Equal Access", Feature Group D is trunk-side LATA access affording call supervision to an IC, a uniform access code (10XXX), optional calling-party identification, recording of access-charge billing details, and presubscription to a customer-specified IC. [In English: Presubscription or 10XXX dialing.] > For example, we've got an AT&T System 25 PBX (or is > PBX an outdated term?). Nope, it's still correct. > Presumably the switching machinery at NYTel talks > to our PBX over the trunk lines to tell it which extension to ring, and our > PBX tells the NYTel gear that the call went through, or it's busy, etc. > Does that mean our trunks have feature group something-or-other? No, Feature Groups are solely for exchange access -- generally by ICs, but also potentially usable by information providers or other parties. > And, what about ANI? Automatic Number Information? Just a guess. > What does it really mean (i.e. what do the letter stand for, and what does > it mean in terms of information transmitted)? Yep, ANI = Automatic Number Identification. Sent by the originating end office to the IC, used for billing purposes as well as other features. NPA-NXX-XXXX. -- David G Lewis ...!bellcore!nvuxr!deej "If this is paradise, I wish I had a lawnmower."