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 ------------------------------------------------------------------------------ John W. Freeborg Hewlett Packard, Corp. jwf@hpcsos.col.hp.com Colorado Telecommunications Division Disclaimer = 5070 Centennial Blvd. 'The opinions expressed are not Colorado Springs, CO 80919 necessarily those of my employer.' (719) 531-4771