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Re: [sipcore] draft on rich call data and Call-Info

Paul Kyzivat <pkyzivat@alum.mit.edu> Wed, 05 August 2020 16:24 UTC

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From: Paul Kyzivat <pkyzivat@alum.mit.edu>
To: "Peterson, Jon" <jon.peterson@team.neustar>, "sipcore@ietf.org" <sipcore@ietf.org>
References: <87AF4B58-D947-417D-AD26-D2D47EE53338@team.neustar> <05017c3b-55e5-c74a-2730-3ba349e14a3d@alum.mit.edu> <3A143F2A-2E4D-4B08-8E61-3F32CB3FB9B4@team.neustar>
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Date: Wed, 05 Aug 2020 12:23:32 -0400
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Archived-At: <https://mailarchive.ietf.org/arch/msg/sipcore/LRkEGNh5FCwl8XTpGBx8p9mljmE>
Subject: Re: [sipcore] draft on rich call data and Call-Info
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I had more thoughts after hitting send. So elaborating:

On 8/5/20 12:01 PM, Peterson, Jon wrote:
> 
> Thanks for taking a glance Paul. Just to the matter of call reason and Subject:
>      
>      Similarly, I think it need do discuss the need for the "call-reason"
>      parameter. As the draft notes, the contents of the Subject header could
>      be used for this purpose. I would like to some some further in
>      investigation of why it is unsuitable before giving up on it.
>      
> Broadly I imagine that call reason might eventually call for structured data to handle cases like internationalization (display the Spanish version if the UE indicates a native Spanish speaker) or broad categories of subject types ("appointment/reservation confirmation" or "IVR callback") that might be handled programmatically in some way. I guess I look at the Subject header as pretty syntactically poor, and moreover something that legacy implementations might expect to treat already in some unhelpful way (most likely by stripping/ignoring it). But I'm interested to hear what people think about this one.

This all makes sense to me. It just needs to make it into the document.

While it makes sense to me that you might want a syntactically richer 
call reason than what fits in the Subject header, as defined it isn't 
any richer - it is still just a string.

	Thanks,
	Paul

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