Article View: comp.protocols.iso
Article #576Re: question about SPDU
From: John Freeborg
Date: Thu, 07 Jun 1990 19:52
Date: Thu, 07 Jun 1990 19:52
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The concatenation rules specify that a GT SPDU (category 0) must ALWAYS be prepended to a DT SPDU (category 2). So often times you will see a session PDU such as: 01-00-01-00 followed by a bunch of data. This is an "empty" GT SPDU concatenated with a DT SPDU (both LIs are 0). You should never see a DT SPDU by itself since category 2 SPDUs must be concatenated with another SPDU. Hope this helps, John ------------------------------------------------------------------------------ John W. Freeborg Hewlett-Packard Company jwf@hpcsos.col.hp.com Colorado Telecommunications Division jwf%hpctdkg@hplabs.hp.com 5070 Centennial Blvd. 'The opinions expressed are not Colorado Springs, CO 80919 necessarily those of my employer.' (719) 531-4771
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!mailrus!cs.utexas.edu!samsung!uakari.primate.wisc.edu!sdd.hp.com!hplabs!hpfcso!hpldola!hpctdlb!hpctdia!jwf From: jwf@hpctdia.HP.COM (John Freeborg) Newsgroups: comp.protocols.iso Subject: Re: question about SPDU Message-ID: <5910005@hpctdia.HP.COM> Date: 7 Jun 90 19:52:31 GMT References: <9006051437.AA12834@ucbvax.Berkeley.EDU> Organization: Hewlett-Packard CTD, Colo. Spgs. Lines: 21