Correct use of the SEL field of NSAP addresses

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2 total messages Started by Greg Sawyers Thu, 17 Dec 1992 08:45

#1279

Author: Greg Sawyers
Date: Thu, 17 Dec 1992 08:45

22 lines
1306 bytes

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?

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?

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

Thanks, 
Greg
 
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Greg Sawyers                              Internet: g.sawyers@trl.oz.au
Telecom Australia Research Laboratories		 Phone: +61 3 253 6454
P.O. Box 249 Clayton, Victoria 3168,		   Fax: +61 3 253 6362
Australia                        
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Re: Correct use of the SEL field of NSAP addresses

#1253

Author: 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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