Re: [MEDIACTRL] [OPS-DIR] FW: Evaluation: draft-ietf-mediactrl-vxml-04.txt toProposed Standard
"Romascanu, Dan (Dan)" <dromasca@avaya.com> Thu, 26 February 2009 10:05 UTC
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Date: Thu, 26 Feb 2009 11:05:40 +0100
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Thread-Topic: [OPS-DIR] FW: Evaluation: draft-ietf-mediactrl-vxml-04.txt toProposed Standard
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From: "Romascanu, Dan (Dan)" <dromasca@avaya.com>
To: Tina TSOU <tena@huawei.com>
Cc: mediactrl@ietf.org, ops-dir@ietf.org, jon.peterson@neustar.biz
Subject: Re: [MEDIACTRL] [OPS-DIR] FW: Evaluation: draft-ietf-mediactrl-vxml-04.txt toProposed Standard
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Tina, Thanks for the review. I will enter a COMMENT in the tracker prior to the IESG telechat. I do not consider these issues blocking, but it would be good for the editors to address them. Regards, Dan ________________________________ From: Tina TSOU [mailto:tena@huawei.com] Sent: Thursday, February 26, 2009 6:27 AM To: Romascanu, Dan (Dan) Cc: ops-dir@ietf.org; daveburke@google.com; Mark.Scott@genesyslab.com Subject: Re: [OPS-DIR] FW: Evaluation: draft-ietf-mediactrl-vxml-04.txt toProposed Standard Hi, This is a review of draft-ietf-mediactrl-vxml-04.txt for its operational impact. Summary: This document specifies a SIP interface to VoiceXML media services. Commonly, application servers controlling media servers use this protocol for pure VoiceXML processing capabilities. . Review summary: This document should consider the compatibility with other protocols between application servers and media servers ----------- Possible Operational Issues: Below are listed a number of issues that may have significant operational impact. Further explanation or investigations is warranted on each of these. --------- Review Questions: Is the document readable? 1. In section 9 Security Considerations, it says SRTP should be supported to provide confidentiality, authentication, and replay protection for RTP media streams (including RTCP control traffic). However, in above use cases, all the message types are RTP/SRTP. In RTP case, how to guarantee security? So I suggest change "RTP/SRTP" to "RTP and SRTP" in all the use cases or to any other expressions to well express the problem. 2. The authentication procedures should also be considered in the document. Does it contain nits? Yes, some. 4.2. SIP Mechanism Note that sending expr/namelist data in the 200 OK response requires that the VoiceXML Media Server delay the final response to the received BYE request until the VoiceXML Application's post-disconnect final processing state terminates. Should be changed to Note that sending expr/namelist data in the 200 OK response requires that the VoiceXML Media Server delays the final response to the received BYE request until the VoiceXML Application's post-disconnect final processing state terminates. If the expr attribute is specified on the <exit> element instead of the namelist attribute, the reserved name __exit is used. Should be changed to If the expr attribute is specified in the <exit> element instead of the namelist attribute, the reserved name -- exit is used. 6.2. Bridge Once the transfer is established, the VoiceXML Media Server can "listen" to the media stream from User Agent 1 to perform speech or DTMF hotword, which when matched results in a near-end disconnect, i.e. the VoiceXML Media Server issues a BYE to User Agent 2 and the VoiceXML Application continues with User Agent 1. A BYE will also be issued to User Agent 2 if the call duration exceeds the maximum duration specified in the maxtime attribute on <transfer>. Should be changed to Once the transfer is established, the VoiceXML Media Server can "listen" to the media stream from User Agent 1 to perform speech or DTMF hotword when matched results in a near-end disconnect, i.e. the VoiceXML Media Server issues a BYE to User Agent 2 and the VoiceXML Application continues with User Agent 1. A BYE will also be issued to User Agent 2 if the call duration exceeds the maximum duration specified in the maxtime attribute on <transfer>. Is the document class appropriate? Yes, the document class seems appropriate. Is the problem well stated? The document does not state clearly why we need to use VoiceXML between Application Server and Media server. Is the problem really a problem? The problem described by this document is not clear enough. Does the document consider existing solutions? No. Does the solution break existing technology? To the best of my understanding, this will not break existing Technology because This protocol is an adjunct to the full MEDIACTRL protocol and packages mechanism. Does the solution preclude future activity? No, this attribute is easily applicable in future situations. Is the solution sufficiently configurable? Yes, the solution is very flexible. Can performance be measured? How? Not sure, because other protocols may have the same performance. Does the solution scale well? No knowledge. B. R. Tina http://tinatsou.weebly.com/contact.html On Feb 22, 2009, at 11:59 PM, Romascanu, Dan (Dan) wrote: A URL of this Internet-Draft is: http://www.ietf.org/internet-drafts/draft-ietf-mediactrl-vxml-03.txt Technical Summary his document describes a SIP interface to VoiceXML media services. Commonly, application servers controlling media servers use this protocol for pure VoiceXML processing capabilities. This protocol is an adjunct to the full MEDIACTRL protocol and packages mechanism. Working Group Summary There is consensus in the WG to publish this document. Document Quality This document has had sufficient work group review. In addition, it had external review by the SIP Work Group. There are multiple known interoperable client and server implementations. The document has been checked using idnits and an ABNF checker and passed both checks. Personnel Eric Burger shepherds this document, has reviewed this document, and believes that the -01 version is ready for forwarding to the IESG for publication. The responsible Area Director is Jon Peterson. Gen-ART review was provided by Scott Brim. RFC Editor Note (Insert RFC Editor Note here or remove section) IRTF Note (Insert IRTF Note here or remove section) IESG Note (Insert IESG Note here or remove section) IANA Note (Insert IANA Note here or remove section) _______________________________________________ OPS-DIR mailing list OPS-DIR@ietf.org https://www.ietf.org/mailman/listinfo/ops-dir
- Re: [MEDIACTRL] [OPS-DIR] FW: Evaluation: draft-i… Romascanu, Dan (Dan)