Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!iuvax!cica!ctrsol!samsung!rex!wuarchive!texbell!attctc!vector!telecom-gateway From: nvuxr!deej@bellcore.bellcore.com (David Lewis) Newsgroups: comp.dcom.telecom Subject: Re: Calling Number Delivery According to Bellcore Message-ID: Date: 17 Nov 89 17:36:08 GMT Sender: news@vector.Dallas.TX.US Organization: Bellcore, Livingston, NJ Lines: 106 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 519, message 2 of 8 In article , w_smith@wookie.enet.dec. com (Willie Smith, LTN Components Eng.) writes: > I got the Bellcore Technical References (thanks to the reader who > sent in the pointer!) for: > CLASS (SM) Feature: Calling Number Delivery TR-TSY-000031 > which is the technical spec on how CND (widely discussed in > TELECOM as Calling Line ID) works, and; > SPCS/Customer Premises Equipment Data Interface TR-TSY-00030 > which is the low level details of how the data gets over the > phone lines from the telco to your house. One thing to keep in mind is that Bellcore TRs are essentially written to the industry to provide requirements for manufacturers; the manufacturers are free to implement products in exact compliance to the Bellcore TRs or not, as they see fit. In other words, the TRs specify how Bellcore says the product/service/system *should* work, which may or may not be the same as the way it *does* work. > They are about $25 each from Bellcore (201) 699-5800 [there's also a > toll-free number, but I don't seem to have it handy] 1-800-521-CORE (2673) > and are well > worth the price, as they answer a lot of the questions that come up in > this Digest. Gosh, it's nice to know someone appreciates us... > 3) CND (CLID) is available in two different flavors, "subscription" is > the usual one, where you sign up for it once, CND is used for all > calls into your house, and you are billed (I assume) monthly. The > other option is "usage-sensitive", where you still have to sign up > for the service (and I imagine pay a connection fee), but you can > turn it on and off at will by dialing *65 or *85 (on and off > respectively, numbers may vary in your area). This service appears > to be billed on a 'number of CNDs sucessfully delivered'. Why would > anyone use the "usage-sensitive" option? This is one place where the above comment comes in. Bellcore wrote the requirements to permit either subscription or usage-sensitive billing. Equipment vendors may or may not have built their products to permit either subscription or usage-sensitive billing; I don't honestly know. The local telco then has the option to sell the service as either subscription or usage-sensitive; I don't know if any telcos have offered it as usage-sensitive. The point of the requirements is to define the technical capabilities which should be available, not the choice of how to sell them -- which is a business decision, which Bellcore emphatically does *not* recommend anything about. (In fact, we have standard disclaimer notices which say, essentially, "we have nothing to do with decisions about pricing, sales, or anything else that could draw out the nasty C-word, collusion...") > 5) Here's an interesting option I don't remember hearing discussed. The > calling party can dial a 4-digit (or longer) PIN that will be displayed > instead of the calling DN. Again -- this is in the TR, but may not be implemented currently or offered currently. Calling Number Delivery Blocking is also in the TR, but I don't know if any telco is offering it. > 6) Another neat future use mentioned in passing is an interface to directory > assistance or another database to provide calling party name instead of > calling DN. Ditto above. > 7) The requirement for a customer initiated testing number is "desirable". > This would allow the customer to dial a special number, hang up, and > get a series of test transmissions (display each digit in each > position, etc). Do any of the CND trials out there provide such a > service? Things which are "desirable" are even less likely to have been implemented than things which are "required"... > Anyway, they seem to have thought this all out pretty carefully, and > it's a very well written set of documents, so if you have more > questions, you can try Emailing me, but the definitive answers are > directly available. Kind of pricey if you get all the associated > documents, but that's life. Gee thanks... And just think -- every dollar you pay Bellcore for documents is one dollar less that has to come out of various people's phone bills to pay my salary!! > I called New England Telephone to try to figure out when this feature > would be available in my area, but the customer service rep didn't > know what I was talking about. In fact, references to Bellcore didn't > seem to ring any bells with her either (sorry :+). Hey, don't sweat it -- some telco people don't even know (or particularly care) which holding company they're owned by... > This has nothing to do with my employer! It does, however, have everything to do with mine... David G Lewis ...!bellcore!nvuxr!deej (@ Bellcore Navesink Research & Engineering Center) "If this is paradise, I wish I had a lawnmower."