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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Thank you very much for your explanation & pointers, Ira.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Somasundaram.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> Ira McDonald [mailto:blueroofmusic@gmail.com]
<br>
<b>Sent:</b> Wednesday, May 14, 2014 10:42 PM<br>
<b>To:</b> Soma Meiyappan; Ira McDonald<br>
<b>Cc:</b> <ipp@pwg.org><br>
<b>Subject:</b> Re: [IPP] printer-alert in PWG 5100.9 & its relevance in IPP FaxOut and IPP Scan<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">Hi,<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">On further reflection.<o:p></o:p></p>
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<p class="MsoNormal">Unary events (including 'configurationChange') in Printer MIB "prtAlertTable" are<o:p></o:p></p>
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<p class="MsoNormal">indeed allowed to be (but not required to be) "aged" out (delete oldest unary<o:p></o:p></p>
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<p class="MsoNormal">event first, is the typical implementation). The algorithm used is implementation<br>
defined. The same would be true for the IPP mapping of "prtAlertTable" rows.<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><br>
See the discussion of configuration change and other unary events in section <br>
2.2.13.4 Alert Table Management on pages 22-23 of RFC 3805.<o:p></o:p></p>
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<p class="MsoNormal">Cheers,<o:p></o:p></p>
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<p class="MsoNormal">- Ira<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">Ira McDonald (Musician / Software Architect)<br>
Co-Chair - TCG Trusted Mobility Solutions WG<br>
Chair - Linux Foundation Open Printing WG<br>
Secretary - IEEE-ISTO Printer Working Group<br>
Co-Chair - IEEE-ISTO PWG Internet Printing Protocol WG<br>
IETF Designated Expert - IPP & Printer MIB<br>
Blue Roof Music / High North Inc<br>
<a href="http://sites.google.com/site/blueroofmusic" target="_blank"><span style="color:#3333FF">http://sites.google.com/site/blueroofmusic</span></a><br>
<a href="http://sites.google.com/site/highnorthinc" target="_blank"><span style="color:#6600CC">http://sites.google.com/site/highnorthinc</span></a><br>
mailto: <a href="mailto:blueroofmusic@gmail.com" target="_blank">blueroofmusic@gmail.com</a><br>
Winter 579 Park Place Saline, MI 48176 734-944-0094<br>
Summer PO Box 221 Grand Marais, MI 49839 906-494-2434<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><o:p> </o:p></p>
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<p class="MsoNormal">On Wed, May 14, 2014 at 10:28 AM, Ira McDonald <<a href="mailto:blueroofmusic@gmail.com" target="_blank">blueroofmusic@gmail.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">Hi,<o:p></o:p></p>
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<p class="MsoNormal">'configurationChange' has always been a one-time event - it was originally derived<o:p></o:p></p>
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<p class="MsoNormal">from the prtGeneralConfigChanges counter in Printer MIB v1 and v2 (RFC 1759 and<o:p></o:p></p>
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<p class="MsoNormal">RFC 3805). It was defined as OPTIONAL event (not state) in IPP Events Notifications
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and Subscriptions (RFC 3995), named 'printer-config-changed'.<o:p></o:p></p>
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<p class="MsoNormal">Some confusion may arise because PWG 5100.9 defines new values for the IPP<br>
attribute "job-state-reasons" - these are NOT states - they are durable reasons that<o:p></o:p></p>
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<p class="MsoNormal">"job-state" may have changed in the past. They must not be simply "aged" out of the<o:p></o:p></p>
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<p class="MsoNormal">"job-state-reasons" attribute. But, if they reflect a binary event (e.g., coverOpen),<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">then they must be removed from "job-state-reasons" when the condition clears.<o:p></o:p></p>
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<p class="MsoNormal">I'll let Mike and Pete answer why it's listed as REQUIRED in IPP FaxOut and IPP Scan.<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">That doesn't sound right to me, based on RFC 3995.<o:p></o:p></p>
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<p class="MsoNormal">Cheers,<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">- Ira<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">Ira McDonald (Musician / Software Architect)<br>
Co-Chair - TCG Trusted Mobility Solutions WG<br>
Chair - Linux Foundation Open Printing WG<br>
Secretary - IEEE-ISTO Printer Working Group<br>
Co-Chair - IEEE-ISTO PWG Internet Printing Protocol WG<br>
IETF Designated Expert - IPP & Printer MIB<br>
Blue Roof Music / High North Inc<br>
<a href="http://sites.google.com/site/blueroofmusic" target="_blank"><span style="color:#3333FF">http://sites.google.com/site/blueroofmusic</span></a><br>
<a href="http://sites.google.com/site/highnorthinc" target="_blank"><span style="color:#6600CC">http://sites.google.com/site/highnorthinc</span></a><br>
mailto: <a href="mailto:blueroofmusic@gmail.com" target="_blank">blueroofmusic@gmail.com</a><br>
Winter 579 Park Place Saline, MI 48176 <a href="tel:734-944-0094" target="_blank">
734-944-0094</a><br>
Summer PO Box 221 Grand Marais, MI 49839 <a href="tel:906-494-2434" target="_blank">
906-494-2434</a><o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><o:p> </o:p></p>
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<p class="MsoNormal">On Tue, May 13, 2014 at 10:18 PM, Soma Meiyappan <<a href="mailto:Soma.Meiyappan@conexant.com" target="_blank">Soma.Meiyappan@conexant.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal">Hello,<br>
<br>
PWG 5100.9 allows an alert code(PrtAlertCodeTC) 'configurationChange' for printer-alert. This value sounds like it is defined to be an event rather than a state.<br>
<br>
If you think that it is a 'state' rather than an 'event', can you please explain how? If it should be treated as a 'state', then should devices initiate a self-determined-timeout value to come out of that 'state' (this sounds like a method to morph an event
into a state)?<br>
<br>
If it is indeed an 'event', then please explain why this attribute (printer-alert) is part of the REQUIRED table in IPP FaxOut and IPP Scan specifications when the IPP operations for event subscription themselves are optional.<br>
<br>
Thanks and Regards,<br>
Somasundaram.<br>
<br>
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