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<p class=MsoNormal><font size=3 face=Arial><span style='font-size:12.0pt;
font-family:Arial'>Dear SLS-SLP and SLS-SEA-DLS WG members,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Arial><span style='font-size:12.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Arial><span style='font-size:12.0pt;
font-family:Arial'>We would like to get your feedback on the following attached
proposal to unify the concepts of Insert Zone and Secondary Header in AOS and
TM.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Arial><span style='font-size:12.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Arial><span style='font-size:12.0pt;
font-family:Arial'>The rationale for this proposal stems from the ongoing work
within the SLS-SEA-DLS WG on defining Secondary Headers for Security and
examination of use of Voice for Real-Time communications over space links. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Arial><span style='font-size:12.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Arial><span style='font-size:12.0pt;
font-family:Arial'>It turns out that by considering both of these cases and
looking at mission’s previous usage and design rationale for these
fields, we believe it makes sense for both TM and AOS to include the same
capabilities and services with respect to Secondary Headers and Insert Zones.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Arial><span style='font-size:12.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Arial><span style='font-size:12.0pt;
font-family:Arial'>At least one of the discussion points we would like to have
within this community is how flexible we want to treat the Secondary Header in
operations. The flexibility would allow for the Secondary Header to appear/or
not appear on a frame by frame basis within a pass. Also the length of the
Secondary Header could be dynamic meaning it could change length during a pass.
These features would allow the insertion of Voice by means of a Secondary
Header to be more efficient in a Push to Talk System which would be a
benefit to the NASA Constellation Program.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Arial><span style='font-size:12.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Arial><span style='font-size:12.0pt;
font-family:Arial'>At this point, we invite you to examine the concepts
expressed in the attachment and please inform us if you foresee any show
stoppers here.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Arial><span style='font-size:12.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Arial><span style='font-size:12.0pt;
font-family:Arial'>thanks,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Arial><span style='font-size:12.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Arial><span style='font-size:12.0pt;
font-family:Arial'>Greg Kazz<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Arial><span style='font-size:12.0pt;
font-family:Arial'>Chairman CCSDS SLS-SLP WG<o:p></o:p></span></font></p>
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