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Article #1253

Re: Correct use of the SEL field of NSAP addresses

#1253
From: Ian Newman
Date: Tue, 22 Dec 1992 10:08
29 lines
1536 bytes
In article <1992Dec17.084512.18550@trl.oz.au> g.sawyers@trl.oz.au writes:
>Hi folks,
>
>I have a question about the SEL field of OSI NSAP addresses. I
>know that it is used within End Systems to select between different
>transport entities, but are there any standard values for it?

I think basically 0 and 255 are reserved values. The transport entity
standards themselves would specify their NSAP SEL value, or they would
be in the International Standard Profiles (ISP) - eg. GOSIP, etc.

>For example, I seem to remember reading that 0 is used to address
>the network entity itself (i.e. the Network Entity Title). Are there
>values for, say TP0-4?

1 is used to address a ISO 8073 (Connection Oriented Transport Protocol).

>Is there a standard or some other document that I should be looking 
>at?

See above.

Ian.

-- 
-----------------------------------------------------------------------------
Ian Newman, BNR Europe Ltd.,		 	 | iann@bnr.co.uk
Transmission Software Development (Dept. GM21),	 | Phone : +44 (0)81 945 3638
Oakleigh Road South, London N11 1HB, UK. 	 | Fax   : +44 (0)81 945 3116
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Path: arc1-ca.pugleaf.net!sparky!uunet!pipex!bnr.co.uk!stc!iann
From: iann@bnr.co.uk (Ian Newman)
Newsgroups: comp.protocols.iso
Subject: Re: Correct use of the SEL field of NSAP addresses
Date: 22 Dec 1992 10:08:57 GMT
Organization: BNR Europe, New Southgate, London.
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Message-ID: <1h6pfpINNma2@bnsgd245.bnr.co.uk>
References: <1992Dec17.084512.18550@trl.oz.au>
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