Subject: RE: [Megaco] ServiceChangeReason parameter

From: "Kevin Boyle" <[email-masked]>
Date: Thu, 2 Aug 2001 11:10:36 -0400

Further, why is Reason required?  What critical knowledge that affects
ServiceChange functionality in the MGC is conveyed via Reason?  It seems to
me that MGC behavior is essentially determined by the Method, and the
current state of the MG (as seen by the MGC).

Kevin

 -----Original Message-----
From: 	Christian Groves [mailto:[email-masked]] 
Sent:	Wednesday, August 01, 2001 8:59 PM
To:	Terry L Anderson
Cc:	[email-masked]; [email-masked]
Subject:	Re: [Megaco] ServiceChangeReason parameter

Hello Terry,

I believe the ASN.1 is correct if you read the procedural text in
ch7.2.8 every element says "The optional", ServiceChangeMethod and
ServiceChangeReason does not have this qualification.

Christian

Terry L Anderson wrote:
> 
> This is another difference between the text and binary versions.  The
ASN.1
> clearly requires serviceChangeMethod and serviceChangeReason in each
> ServiceChange command with all other parameters optional, but the ABNF
simply
> states (in comments added in IG 6.5 and 6.72) that each item can appear at
most
> once and only one of ServiceChangeAddress and ServiceChangeMgcId - no
element
> is required.
> 
> I am not sure that this difference was intentional but that is the current
> state of the spec.  Do we want the ABNF to also require
ServiceChangeMethod and
> ServiceChangeReason?  The registration in the text-based example in A.1.1
> contains a Method but not a Reason.
> 
> IPEK SARAC wrote:
> 
> > Hello,
> >
> > RFC3015 doesn't mention if ServiceChangeReason for ServiceChange command
is
> > mandatory or optional (it doesn't say optional so i take it as
required).
> > Megaco Call Flow Examples draft doesn't include a ServiceChangeReason in
> > cold start scenario. Which one is true?
> >
> > Thanks in advance.
> >
> > Ipek Sarac
> >
> > _______________________________________________
> > Megaco mailing list
> > [email-masked]
> > http://www.ietf.org/mailman/listinfo/megaco
> 
> --
> Waiting for the other shoe to drop but hoping its a one legged man.
> ------------------------------------------------------------
> Terry L Anderson              mailto:[email-masked]
> Tel:908.582.7013   Fax:908.582.6729
> Lucent Technologies/INS/Voice Over IP Access Networks
> Rm 2B-121, 600 Mountain Av, Murray Hill, NJ 07974
> http://its.lucent.com/~tla (Lucent internal) http://www.gti.net/tla

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