Path: utzoo!utgpu!watmath!att!tut.cis.ohio-state.edu!ucbvax!hplabs!hpfcdc!hpldola!hpctdlb!jwf
From: jwf@hpctdlb.HP.COM (John Freeborg)
Newsgroups: comp.protocols.iso
Subject: ISO Session HELP!
Message-ID: <5910001@hpctdlb.HP.COM>
Date: 16 Aug 89 17:35:03 GMT
Organization: Hewlett-Packard CTD, Colo. Spgs.
Lines: 30


     I don't know if I'm reading ISO 8327 correctly or not (the session
layer protocol spec.).  Here is a question that I'm fuzzy on:

    Whenever a category 2 SPDU is sent will a category 0 SPDU
    ALWAYS be concatenated onto the front?
   
(category being used with respect to concatenation categories 0,1, and 2)
(the above question being asked irregardless of the extended concatenation
 option)

Basically I'm wondering if the only legal way you'll see a data SPDU is
with a give token or please token SPDU concatenated onto the front.

With both the give token and data SPDUs having a SI of 1 the spec. would
be ambigious if the above rule didn't hold - correct?

Can you ever have a TSDU with JUST a data SPDU contained in it?

Thanks for any help in advance,
     John
	Freeborg


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John W. Freeborg			Hewlett Packard, Corp.
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