February 2002 - sg16-avd - lists.packetizer.com

FW: Question about the use of alternateEndpoints in ACF
by Lyons, Terry 05 May '02

05 May '02

> H.225 v4 contains this text: > "7.11.2 AdmissionConfirm (ACF) > ... alternateEndpoints - A sequence of prioritized endpoint alternatives > for destCallSignalAddress or destinationInfo." > > The feature seems intended to support robustness through redundancy in > large networks, > where there may be more than one media gateway capable of serving the same > AdmissionRequest (ARQ). > This would accord with the support for alternate gatekeepers in H.323 v4: > "7.2.6 Alternate gatekeeper procedures > For the purposes of ensuring system availability, redundancy, and > scalability, the Gatekeeper may provide the RAS signalling function by > utilizing multiple physical or logical devices, referred to as Alternate > Gatekeepers. If the endpoint supports the Alternate Gatekeeper procedures > defined in this section, it should include the supportsAltGK field in the > GRQ and RRQ messages. > When an endpoint initiates communication with the Gatekeeper, it may be > provided with a list of Alternate Gatekeepers via the GCF message. If the > Gatekeeper does not respond to the subsequent RRQ, the endpoint shall > attempt to register with the Gatekeeper using the list of Alternate > Gatekeepers provided in the GCF. If no Alternate Gatekeeper responds, the > endpoint shall reinitiate the Gatekeeper discovery process." > > The problem is that there are no procedures specified for the use of > alternateEndpoints. > What is it that causes a caller to terminate its Setup attempt to one > destination and to initiate a Setup attempt to the next destination in > priority order? > > Can we presume that the critical event is receiving a ReleaseComplete? > Then how do we determine whether the release reason or cause code is final > (no further Setup should be sent) or not (try another destination)? > Some calls should end after an announcement is played, eg. "The number you > are calling has been disconnected", > and will never succeed no matter how many alternative endpoints are > attempted. > > If the intention of alternateEndpoints has already been clarified > somewhere, please point me to it and excuse my ignorance. > > - TLyons(a)sonusnet.com +1 732 625-3003 ext 212 >

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SG16 Feb 2002 outputs
by Christian Groves 28 Feb '02

28 Feb '02

G'Day all, I have uploaded to the following Geneve outputs: pl-023_H248_Annex_M5.zip pl-024_H248_Annex_N.zip pl-027_H248_Packages_Guide.zip pl-034_H248_Annex_L_amm1.zip 2-073r2_Q3_meeting_report.zip to: ftp://standard.pictel.com/avc-site/Incoming/ Regards, Christian

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0202_Gen documents
by OKUBO Sakae 17 Feb '02

17 Feb '02

Dear SG16 experts, I have moved all the files at /Incoming to /0202_Gen directory. using browser http://standard.pictel.com/ftp/avc-site/0202_Gen/ using ftp tool ftp://standard.pictel.com/avc-site/0202_Gen/ Using this opportunity, can I ask the following? 1) to Rapporteurs and Editors Please upload the output documents for the Geneva meeting last two weeks to /Incoming. Mr. Tosco's WP2 report is already available as /0202_Gen/WP2_report_020215.zip. Please note again that the PictureTel site is not to mirror the ITU TIES site, but used for the benefits of experts based on the voluntary efforts of the contributors. Post an announcement at the reflector when you have uploaded your document. 2) to everybody Please refrain from using space in your file name when you upload a file at /Incoming. Use of _ is suggested. It eases file manipulation such as zip and move. 3) to Q5 Rapporteur and Editors I found several mobility related files at /Incoming. Please advise me if some of them are working documents thus can be deleted. Best regards, OKUBO Sakae ********************************************************* Global Information and Telecommunication Institute (GITI) Waseda University 29-7 Waseda University Bldg. 1-3-10 Nishi-Waseda, Shinjuku-ku, Tokyo 169-0051 Japan e-mail: okubo(a)giti.waseda.ac.jp Tel: +81 3 3204 8194 Fax: +81 3 5286 3832 *********************************************************

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Re: avd-2152
by Tom-PT Taylor 17 Feb '02

17 Feb '02

Here is the relevant passage from the Dublin meeting report: AVD-2152 - Metrology proposal for Multimedia [France Telecom] The contribution was discussed and it was agreed that the proposals, particularly those on modelling bursty packet loss should be incorporated into the draft of H.mmclass. An editing group met to produce a first draft of H.mmclass. This is contained in TD-31 and was presented and agreed by the meeting. -----Original Message----- From: Freytsis, Ilya [mailto:ifreytsis@CETACEAN.COM] Sent: Wednesday, February 13, 2002 6:47 PM To: ITU-SG16(a)echo.jf.INTEL.COM Subject: avd-2152 Hello, Could anybody tell me if any further work was done to follow this AVD submitted for the meeting in Dublin? Was it discussed in Dublin? Thank you. Ilya Freytsis Principal Engineer Cetacean Networks Inc. ph. (603) 766-6065 fax (603) 766-7190 ifreytsis(a)cetacean.com

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Reports of the Working Party 2
by OKUBO Sakae 15 Feb '02

15 Feb '02

Dear SG16 experts, We have just finished the SG16 meeting in Geneva. I have placed the following report of Working Party 2 that Mr. Tosco and Rapporteurs generated at the Incoming directory of the PictureTel ftp site. It will be moved to /0202_Gen without notice. So please find it either at /Incoming or /0202_Gen. using browser http://standard.pictel.com/ftp/avc-site/Incoming/WP2_report_020215.zip using ftp tool ftp://standard.pictel.com/avc-site/Incoming/WP2_report_020215.zip It consists of the following six files: Report Part I 2.02r.doc -- report of the discussions Rep. Part II 2.02r.doc -- list of documents for consented/approved Liaison statements 2.02r.doc -- liaison statements to be sent out Meetings Rep 2.02r.doc -- plan of interim meetings Status Report 2.02r.doc -- Status Report for Recommendations of WP2/16 sg16wkpr WP2r.doc -- WP2 work program Best regards, OKUBO Sakae ********************************************************* Global Information and Telecommunication Institute (GITI) Waseda University 29-7 Waseda University Bldg. 1-3-10 Nishi-Waseda, Shinjuku-ku, Tokyo 169-0051 Japan e-mail: okubo(a)giti.waseda.ac.jp Tel: +81 3 3204 8194 Fax: +81 3 5286 3832 *********************************************************

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ASN.1 Information
by Paul E. Jones 14 Feb '02

14 Feb '02

Folks, An interesting presentation was given to attendees of the ITU-T SG16 meeting attendees this past week by Mr. Olivier Dubuisson on the topic of ASN.1. You can preview the slides at: http://asn1.elibel.tm.fr/biblio/improve-your-ASN1-specifications.htm or download the zipped PowerPoint file from: http://asn1.elibel.tm.fr/biblio/improve-your-ASN1-specifications.zip Best Regards, Paul

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avd-2152
by Freytsis, Ilya 13 Feb '02

13 Feb '02

Hello, Could anybody tell me if any further work was done to follow this AVD submitted for the meeting in Dublin? Was it discussed in Dublin? Thank you. Ilya Freytsis Principal Engineer Cetacean Networks Inc. ph. (603) 766-6065 fax (603) 766-7190 ifreytsis(a)cetacean.com

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Re: Annex O
by OKUBO Sakae 04 Feb '02

04 Feb '02

Dear Orit, >I am experiencing some problems with the PictureTel site. >Could you, please, upload the attached documentto the Geneva directory? It is now available at the following place: using browser http://standard.pictel.com/ftp/avc-site/0202_Gen/AnnexO.zip using ftp tool ftp://standard.pictel.com/avc-site/0202_Gen/AnnexO.zip Best regards, OKUBO Sakae ********************************************************* Global Information and Telecommunication Institute (GITI) Waseda University 29-7 Waseda University Bldg. 1-3-10 Nishi-Waseda, Shinjuku-ku, Tokyo 169-0051 Japan e-mail: okubo(a)giti.waseda.ac.jp Tel: +81 3 3204 8194 Fax: +81 3 5286 3832 *********************************************************

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