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<p class="MsoNormal"><span style="font-size:14.0pt">Dear SLP WG,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-indent:.25in"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">On topic we didn’t address during our Spring ’25 SLP WG meeting this past week at APL, was Tom Gannett’s suggestion, that the TC
</span><i><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">COMMUNICATIONS LINK CONTROL WORD(CLCW)
</span></i><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">be added as a separate chapter to the Generic Session Control Book, 235.1.<o:p></o:p></span></p>
<p class="MsoNormal" style="text-indent:.25in"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-indent:.25in"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">I would like to get your opinion regarding this additional reorganization step. I will state my opinion below as well.<o:p></o:p></span></p>
<p class="MsoNormal" style="text-indent:.25in"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-indent:.25in"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">This was Tom’s suggestion below:<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.25in"><i><span style="font-family:"Calibri",sans-serif;color:black">[<b>Tom Gannett</b>] Specifically, I would create a new section in the Generic Session Control book, Section 3, Protocol Data Units; move 4.2.1, COMMUNICATIONS
LINK CONTROL WORD from TC SDLP to subsection 3.1 in the Session book; and move SUPERVISORY to subsection 3.2 in the Generic Session Control book:</span></i><i><span style="font-family:"Times New Roman",serif;color:black"><o:p></o:p></span></i></p>
<p class="MsoNormal"><i><span style="font-family:"Calibri",sans-serif;color:black"> </span></i><i><span style="font-family:"Times New Roman",serif;color:black"><o:p></o:p></span></i></p>
<p class="MsoNormal" style="text-indent:.25in"><i><span style="font-family:"Calibri",sans-serif;color:black">1 INTRODUCTION</span></i><i><span style="font-family:"Times New Roman",serif;color:black"><o:p></o:p></span></i></p>
<p class="MsoNormal" style="text-indent:.25in"><i><span style="font-family:"Calibri",sans-serif;color:black">2 OVERVIEW</span></i><i><span style="font-family:"Times New Roman",serif;color:black"><o:p></o:p></span></i></p>
<p class="MsoNormal" style="text-indent:.25in"><i><span style="font-family:"Calibri",sans-serif;color:black">3 PROTOCOL DATA UNITS</span></i><i><span style="font-family:"Times New Roman",serif;color:black"><o:p></o:p></span></i></p>
<p class="MsoNormal" style="text-indent:.25in"><i><span style="font-family:"Calibri",sans-serif;color:#EE0000">3.1 COMMUNICATIONS LINK CONTROL WORD</span></i><i><span style="font-family:"Times New Roman",serif;color:black"><o:p></o:p></span></i></p>
<p class="MsoNormal" style="text-indent:.25in"><i><span style="font-family:"Calibri",sans-serif;color:black">3.2 SUPERVISORY PROTOCOL DATA UNIT</span></i><i><span style="font-family:"Times New Roman",serif;color:black"><o:p></o:p></span></i></p>
<p class="MsoNormal" style="text-indent:.25in"><i><span style="font-family:"Calibri",sans-serif;color:black">4 DATA SERVICES OPERATIONS</span></i><i><span style="font-family:"Times New Roman",serif;color:black"><o:p></o:p></span></i></p>
<p class="MsoNormal" style="text-indent:.25in"><i><span style="font-family:"Calibri",sans-serif;color:black">4.1 STATE TABLES</span></i><i><span style="font-family:"Times New Roman",serif;color:black"><o:p></o:p></span></i></p>
<p class="MsoNormal" style="text-indent:.25in"><i><span style="font-family:"Calibri",sans-serif;color:black"> ETC.</span></i><i><span style="font-family:"Times New Roman",serif;color:black"><o:p></o:p></span></i></p>
<p class="MsoNormal"><i><span style="font-family:"Calibri",sans-serif;color:black"> </span></i><i><span style="font-family:"Times New Roman",serif;color:black"><o:p></o:p></span></i></p>
<p class="MsoNormal" style="margin-left:.25in"><i><span style="font-family:"Calibri",sans-serif;color:black">I believe this is a clean approach that would make COP services and session control available without the need to invoke the PDU format specifications
in TC SDLP and Proximity-1, but I have not looked at all potential ramifications in all Data Link Layer specs. . . .</span></i><i><span style="font-family:"Times New Roman",serif;color:black"><o:p></o:p></span></i></p>
<p class="MsoNormal"><i><span style="font-family:"Calibri",sans-serif;color:black"> </span></i><i><span style="font-family:"Times New Roman",serif;color:black"><o:p></o:p></span></i></p>
<p class="MsoNormal" style="margin-left:.25in"><i><span style="font-family:"Calibri",sans-serif;color:black">All the cross references to CLCW/PLCW/SPDU in the source books would be changed to direct references to the Session book; current references in the
COPs to CLCW/PLCW/SPDU in the source SDLP books would be changed to references to the Session book.
</span></i><i><span style="font-family:"Times New Roman",serif;color:black"><o:p></o:p></span></i></p>
<p class="MsoNormal"><i><span style="font-family:"Calibri",sans-serif;color:black"> </span></i><i><span style="font-family:"Times New Roman",serif;color:black"><o:p></o:p></span></i></p>
<p class="MsoNormal" style="margin-left:.25in"><i><span style="font-family:"Calibri",sans-serif;color:black">TC SLDP would have to be pink sheeted, and any books currently referencing TC SDLP for COP-related stuff would need to updated (via corrigendum probably).</span></i><i><span style="font-family:"Times New Roman",serif;color:black"><o:p></o:p></span></i></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:.25in"><span style="font-family:"Calibri",sans-serif;color:black">[<b>Greg</b>] This approach that Tom is advocating would make the COP-1 control word generic (CLCW), but would add Telecommand to the Session book, which
currently isn’t used in a generic sense like Prox-1, USLP, and AOS. TC SDLP really should not have the CLCW defined in it, since the TC Frame is the defacto PDU of that document. However, given the high priority to generate the Session Control book, it seems
currently, there is not a big driver to create this separate 3.1 CLCW chapter in the Session book, mainly because Telecommand isn’t envisioned to have session control. So from my point of view, there is no action to be taken here.<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.25in"><span style="font-family:"Calibri",sans-serif;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:.25in"><span style="font-family:"Calibri",sans-serif;color:black">Your thoughts ?<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.25in"><span style="font-family:"Calibri",sans-serif;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:.25in"><span style="font-family:"Calibri",sans-serif;color:black">Best regards,<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:.25in"><span style="font-family:"Calibri",sans-serif;color:black">Greg<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt;color:black"><o:p> </o:p></span></p>
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