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<p class="MsoNormal"><span style="font-size:12.0pt">Dear All,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">I’m sorry that I wasn’t able to participate in today’s telecon, due to a prior commitment. Having not participated, I don’t know the final fate of the SPP book. But there is one other item that I came across
that I’d like to bring to the WG’s attention as something else to consider in the process of cleaning up (or replacing) the SPP book.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">The Packet Processing function of the AOS SDLP includes generation of Idle Packets when no packets containing user data are available. The definition of “Idle Packet” is cross-referenced to the SPP book.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:12.0pt">The SPP book states “</span><span style="font-size:12.0pt">If the Packet is an Idle Packet, the User Data Field shall contain Idle Data”, and follows this with the NOTE “The bit
pattern of Idle Data is not specified in this Recommendation.” The trail goes cold there.<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:12.0pt">A similar situation exists for the multiplexing schemes for VCs and MCs (that is they are not defined by the SDLP Recommended Standards), but in those cases the multiplexing schemes
are identified as Managed Parameters. Given that “Managed Parameters” is another way of saying “stuff that has to be configured that is not defined in the book itself”, I suggest that the packet Idle Pattern also be treated as a Managed Parameter.
<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:12.0pt">Best regards,<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:12.0pt">John<o:p></o:p></span></p>
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