RNR in LAPB

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#540

From: John H. Dale
Date: Tue, 01 Sep 1992 16:08

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I'm having trouble understanding one paragraph of ISO LAPB:
ISO 7776-1986, last paragraph of 5.4.7, Receiving an RNR frame.
Are there any corregenda, defect reports, or other documents
clarifying this?

I'm particularly interested in the exact meaning of the
phrase "any time during the enquiry process."  

It also seems curious that the third sentence begins "if 
Timer T1 is running" since there is no enquiry unless
Timer T1 is running.  

ISO 4335-1987 and CCITT X.25-1988 have interesting variations
on this subject.  I understand that 4335 must be regarded
as the definitive document, so maybe clarification of what
4335 requires is what I really need.

John Dale
jdale@cos.com

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Newsgroups: comp.protocols.iso
Path: arc1-ca.pugleaf.net!sparky!uunet!cos!jdale
From: jdale@cos.com (John H. Dale)
Subject: RNR in LAPB
Message-ID: <1992Sep1.160812.5124@cos.com>
Keywords: LAPB RNR
Organization: Corporation for Open Systems
Date: Tue, 1 Sep 1992 16:08:12 GMT
Lines: 20