Subject: Re: [SUA issues 3,6,7] text

From: "Brian F. G. Bidulock" <[email-masked]>
Date: Tue, 4 Sep 2001 02:50:27 -0500

John,

On Tue, 04 Sep 2001, John Loughney wrote:

> Brian,
> 
> > In some of these parameters you refer to excess bits as "unused" and
> > in others you refer to them as "spare".  Is there any difference
> > between "spare" and "unused"?
> > 
> > Many parameters which do not use a full 8 bits have excess bits
> > within the defined field that are neither referred to as "unused" or
> > "spare" but are clearly excess bits.  What is the difference between
> > "unused", "spare", and these excess bits in the defined field?
> > 
> > There is no description on any restrictions of how "spare", "unused"
> > and excess field bits are to be coded.  For example, can they be coded
> > to random values?
> 
> All text saying 'unused' has been removed.  I have added that when
> 'spare' bits are concerned, they should  be coded zero.

How about: SHOULD be coded zero by the sender and MUST be ignored by
the receiver.  This works better for forwards compatibility.

--brian

-- 
Brian F. G. Bidulock
[email-masked]
http://www.openss7.org/

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