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- From: ketil@edb.tih.no (Ketil Albertsen,TIH)
- Newsgroups: comp.protocols.iso
- Subject: Re: What is Q3?
- Message-ID: <1993Jan27.073805.16522W@lumina.edb.tih.no>
- Date: 27 Jan 93 07:38:00 GMT
- References: <C1ED3n.7yv@hpwin052.uksr.hp.com> <1993Jan26.075848.28882W@lumina.edb.tih.no> <CMM.0.90.2.728041349.jon@gode.ifi.uio.no>
- Sender: ketil@edb.tih.no (Ketil Albertsen,TIH)
- Organization: T I H / T I S I P
- Lines: 33
- Posting-Front-End: Winix Conference v 92.05.15 1.20 (running under MS-Windows)
-
- In article <CMM.0.90.2.728041349.jon@gode.ifi.uio.no>, "Jon \\lnes"
- <jon@ifi.uio.no> writes:
-
- >In article <1993Jan26.075848.28882W@lumina.edb.tih.no> ketil@edb.tih.no (Ketil
- >Albertsen,TIH) writes:
-
- >> I suspect that the Q3 you are referring to is the *reference point* Q3, it
- >> is not a standard itself, but defined by Q.941 or thereabouts (Q.94?).
-
- >Wrong, although not entirely wrong. The base document to ce
- >is CCITT's TMN (Telecommunications Management Network) architecture,
- >described in the M.3010 document (formerly M.30).
-
- Mea culpa. I checked my stack of old notes, and a lot of the TMN stuff
- WERE labelled Q.942. But those were 1987 working drafts, and the info was
- reorganized (into the M series) before the 1988 CCITT pleanry assembly.
-
- But:
-
- >If two functional blocks are realized within one piece of equipment, the
- >reference point between them is an internal interface, and its implementation
- >is not standardized. If the blocks are in different pieces of equipment,
- >the reference point must be realized as a standardized communication inter-
- >face, denoted by a capitalization of the letter, e.g. 'Q3'.
-
- Are you certain that you are not turning it upside-down? I have always
- been told (by telecom people) that conceptual reference points are labelled
- with uppercase letters, while physical interfaces are labelled with
- lowercase ones. If you look in the ISDN standards, eg. I.210, the ref
- points are consistenly called R, S, T (defining *functionality*); if an
- NT2 and an operator TE1 is physically integrated you still have an S
- reference point but no physical "s" interface. Or is it me turning it
- around? (I am not a telecom man myself!)
-