[MEDIACTRL] Questions on draft-ietf-mediactrl-ivr-control-package
"Henry Lum" <Henry.Lum@alcatel-lucent.com> Fri, 08 January 2010 20:25 UTC
Return-Path: <Henry.Lum@alcatel-lucent.com>
X-Original-To: mediactrl@core3.amsl.com
Delivered-To: mediactrl@core3.amsl.com
Received: from localhost (localhost [127.0.0.1]) by core3.amsl.com (Postfix) with ESMTP id E3AC73A67C0 for <mediactrl@core3.amsl.com>; Fri, 8 Jan 2010 12:25:44 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.398
X-Spam-Level:
X-Spam-Status: No, score=-1.398 tagged_above=-999 required=5 tests=[BAYES_00=-2.599, HTML_MESSAGE=0.001, J_CHICKENPOX_64=0.6, J_CHICKENPOX_75=0.6]
Received: from mail.ietf.org ([64.170.98.32]) by localhost (core3.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Myv0yfy2NnQo for <mediactrl@core3.amsl.com>; Fri, 8 Jan 2010 12:25:34 -0800 (PST)
Received: from ihemail1.lucent.com (ihemail1.lucent.com [135.245.0.33]) by core3.amsl.com (Postfix) with ESMTP id BB6143A6835 for <mediactrl@ietf.org>; Fri, 8 Jan 2010 12:25:34 -0800 (PST)
Received: from ihrh1.emsr.lucent.com (h135-1-218-53.lucent.com [135.1.218.53]) by ihemail1.lucent.com (8.13.8/IER-o) with ESMTP id o08KPWTQ028207 for <mediactrl@ietf.org>; Fri, 8 Jan 2010 14:25:32 -0600 (CST)
Received: from relay-out1.wc.genesyslab.com (relay-out1.wc.genesyslab.com [172.22.70.114]) by ihrh1.emsr.lucent.com (8.13.8/emsr) with ESMTP id o08KPV8Y016350 for <mediactrl@ietf.org>; Fri, 8 Jan 2010 14:25:32 -0600 (CST)
Received: from g2.genesyslab.com (g2.genesyslab.com [192.168.20.138]) by relay-out1.wc.genesyslab.com (8.13.8+Sun/8.13.8) with ESMTP id o08KPU3V016748 for <mediactrl@ietf.org>; Fri, 8 Jan 2010 12:25:30 -0800 (PST)
Received: from NAHALD.us.int.genesyslab.com ([192.168.20.92]) by g2.genesyslab.com with Microsoft SMTPSVC(6.0.3790.3959); Fri, 8 Jan 2010 12:25:30 -0800
X-MimeOLE: Produced By Microsoft Exchange V6.5
Content-class: urn:content-classes:message
MIME-Version: 1.0
Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01CA90A0.B913B876"
Date: Fri, 08 Jan 2010 12:25:26 -0800
Message-ID: <059AF07365DC474393A19A3AF187DF74051E1ACA@NAHALD.us.int.genesyslab.com>
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
Thread-Topic: Questions on draft-ietf-mediactrl-ivr-control-package
Thread-Index: AcqQoLamC9OYfnVlQJOxfAOrsQkDcA==
From: Henry Lum <Henry.Lum@alcatel-lucent.com>
To: mediactrl@ietf.org
X-OriginalArrivalTime: 08 Jan 2010 20:25:30.0816 (UTC) FILETIME=[B91A5C00:01CA90A0]
X-Scanned-By: MIMEDefang 2.57 on 135.245.2.33
Subject: [MEDIACTRL] Questions on draft-ietf-mediactrl-ivr-control-package
X-BeenThere: mediactrl@ietf.org
X-Mailman-Version: 2.1.9
Precedence: list
List-Id: Media Control WG Discussion List <mediactrl.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/listinfo/mediactrl>, <mailto:mediactrl-request@ietf.org?subject=unsubscribe>
List-Archive: <http://www.ietf.org/mail-archive/web/mediactrl>
List-Post: <mailto:mediactrl@ietf.org>
List-Help: <mailto:mediactrl-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/mediactrl>, <mailto:mediactrl-request@ietf.org?subject=subscribe>
X-List-Received-Date: Fri, 08 Jan 2010 20:25:45 -0000
Hi, This is the first time I have carefully read through the draft, and I have a bunch of questions for the IVR control package: - Why can't <dialogterminate> result in an <dialogexit> event for PREPARED and STARTING state while this is done for STARTED state only? If PREPARED state can generate dialogexit from a timeout, why can't it generate a dialogexit from a dialogterminate? - Can the preparation duration for a prepared dialog be set in dialogprepare? The recommended value of 30s seems to be fairly short to me, and CCXML does not have this kind of arbitrary timeout as well. If I am writing an outbound calling application (with CCXML), I would first prepare the dialog to make sure the dialog is ready to go (and making sure a VXML page is well formed) and then I would place the outbound call. It's very likely by the time the user answers and call progress detection is completed, 30s would have been passed and the prepared dialog would be terminated by this timer. Why do we need this timeout anyways? - Section 4.2.2 - would it be more convenient that if neither connectionid and conferenceid is defined, it would take the connection from the current SIP dialog associated with this control channel? Of course this wouldn't work if the control channel is a dedicated one - I think it would be a syntactic sugar to have such a shortcut. - There is a typo in the example of section 4.2.2.1.1: ... <subscribe> <dmtfnotify matchmode="control"/> -- should be dtmfsub instead </subscribe> ... - Can a dialog prefetch all the media prompts inside the dialog and then report an error when any of the fetch fails? This is one thing I am having problem with MSML is that you can only fail during execution and the control client have to intelligently resume where the failure happens, thus adding complexity to the control client. If the control client knows one of the prompts fail to fetch, it would be easier for the control client to try an alternate prompt altogether rather than having the prompt to fail after playing the fifth wav file. - Am I allowed to define more than one <prompt> inside <dialog> so that I can define the first <prompt> to be bargein=false, and the second one with bargin=true? The execution model for <dialog> (#4 in 4.3.1) is a bit unclear on this. - The definition of <par> is a bit sketchy here. Should the child elements of <par> target which <stream> it can target the output on? If there is no target, then how does MS know which stream it should place the output or the MS makes a best-effort decision on this? - If <control> is active for a <prompt>, does it mean bargein has no effect for the <prompt>? - Does the DTMF digit buffer last over the lifetime of a <dialog>? - If I start two simultaneous <dialog> on a connection, then I assume we send the DTMF digits to both dialogs, however, does media server keep a single digit buffer for both dialogs? - Does <control> automatically consume the entire digit buffer? The third paragraph of 4.3.1.2 seems to imply this. - If I am allowed to have multiple <prompt> elements, does <control> take effect to all the <prompt> elements? Does that mean I can't just use <control> on a <prompt> element and then not use it for the next <prompt>? - In my opinion, I think a better way to express <control> is to allow a set of generic grammar to trigger events on <control>, which then sends a control action to a specified <prompt>, rather than having a prescribed set of attributes that define both the event and the action. In a way a <prompt> is an event-based element where it can take events sent from other controls such as the <control> element. I think this is more in line with the SMIL model as this spec is borrowing some parts of the event sequencing with <par> and <seq> anyways. This can make extensions simpler if someone wants to build a speech based control and send actions to a <prompt>. - Just to be clear when <grammar> is defined in <collect>, does it override escapekey, termchar, as well as maxdigits? - In the DTMF collection execution, noinput, nomatch, and match all results in a termination of collection execution. Does this imply that dialog continue execution on step 5 of section 4.3.1? If the dialog defines a repeatCount, then does it mean that the dialog repeats the collection again? How do I model a different prompt for noinput and nomatch without having the control client to request for a new dialog? For a match, I can see that I can use a dtmfnotify to notify the control client that a match is made, but I still need the control client to explicitly terminate the dialog. I worry that there are side effects with explicitly terminating the dialog on a match when <dialogterminate> is processed slowly, the user may hear the dialog again if the repeatCount is greater than one. - I have a concern with <record> that I also have with MSCML and MSML is that it allows record to specify a destination (loc attribute in <media>). This in a way creates a bunch of related security issues that needs to be addressed by the system and makes the markup inherently system-dependent. I actually like the way VXML defines it with a record item variable; you can reuse it later in the markup and you can also submit it with the <submit> tag. This makes the VXML implementation platform-independent and there is no need to worry about security concerns inherited by exposing potential system structure to the control client. - Section 12.2.1 session.connection.redirect has an errata that I also sent an email for RFC5552. It should take the History-Info hi-entry elements in order in the session variable. - When conferenceid attribute is used for a VXML dialog, will session.connection evaluate to null? Sorry for inflicting a pile of questions - I plan to read up on the mixer package and I'll probably have even more questions/comments J Thanks! Henry ------------------------------------------------------------------------------------------------------------------- CONFIDENTIALITY NOTICE: This e-mail and any files attached may contain confidential and proprietary information of Alcatel-Lucent and/or its affiliated entities. Access by the intended recipient only is authorized. Any liability arising from any party acting, or refraining from acting, on any information contained in this e-mail is hereby excluded. If you are not the intended recipient, please notify the sender immediately, destroy the original transmission and its attachments and do not disclose the contents to any other person, use it for any purpose, or store or copy the information in any medium. Copyright in this e-mail and any attachments belongs to Alcatel-Lucent and/or its affiliated entities.
- [MEDIACTRL] Questions on draft-ietf-mediactrl-ivr… Henry Lum
- Re: [MEDIACTRL] Questions on draft-ietf-mediactrl… Spencer Dawkins
- Re: [MEDIACTRL] Questions on draft-ietf-mediactrl… Scott McGlashan
- Re: [MEDIACTRL] Questions on draft-ietf-mediactrl… Scott McGlashan
- Re: [MEDIACTRL] Questions ondraft-ietf-mediactrl-… Henry Lum
- Re: [MEDIACTRL] Questions ondraft-ietf-mediactrl-… Scott McGlashan
- Re: [MEDIACTRL] Questions ondraft-ietf-mediactrl-… Henry Lum
- Re: [MEDIACTRL] Questions ondraft-ietf-mediactrl-… Scott McGlashan
- Re: [MEDIACTRL] Questions ondraft-ietf-mediactrl-… Spencer Dawkins
- Re: [MEDIACTRL] Questions ondraft-ietf-mediactrl-… Henry Lum