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<p class=MsoNormal><font size=3 face=Arial><span style='font-size:12.0pt;
font-family:Arial'>SLS-SLP and SIS-IPO WGs,<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'>I have placed a new update to the Space Link Identifers Pink
Sheet under current CCSDS review.<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'>This update contains a description of the conditions under
which the proposed ID #35 would be used. <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 file name is 135x0p302working-wbw4-13-09.doc<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'>I have loaded this file into the public folders of both the
SIS-IPO and SLS-SLP WG directories since it impacts both areas.<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'>For SLS: <a
href="http://cwe.ccsds.org/sls/docs/Forms/AllItems.aspx?RootFolder=%2fsls%2fdocs%2fSLS%2dSLP%2fDraft%20Documents&FolderCTID=&View=%7b16ACDA38%2dFFA3%2d4657%2d8F27%2dB166C23C24A2%7d">http://cwe.ccsds.org/sls/docs/Forms/AllItems.aspx?RootFolder=%2fsls%2fdocs%2fSLS%2dSLP%2fDraft%20Documents&FolderCTID=&View=%7b16ACDA38%2dFFA3%2d4657%2d8F27%2dB166C23C24A2%7d</a><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'>For SIS:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Arial><span style='font-size:12.0pt;
font-family:Arial'><a
href="http://cwe.ccsds.org/sis/docs/Forms/AllItems.aspx?RootFolder=%2fsis%2fdocs%2fSIS%2dIPO%2fDraft%20Documents&FolderCTID=&View=%7b390C4ADA%2dA69B%2d4E52%2dA0DA%2d50C48F989C4B%7d">http://cwe.ccsds.org/sis/docs/Forms/AllItems.aspx?RootFolder=%2fsis%2fdocs%2fSIS%2dIPO%2fDraft%20Documents&FolderCTID=&View=%7b390C4ADA%2dA69B%2d4E52%2dA0DA%2d50C48F989C4B%7d</a><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'><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 change to the text is:<o:p></o:p></span></font></p>
<p class=MsoNormal><u><font size=3 color=blue face="Times New Roman"><span
style='font-size:12.0pt;color:blue'>Enumeration #35 Frame Relay
IP Header Compression Control Protocol (FRIHCP)<a style='mso-footnote-id:ftn1'
href="#_ftn1" name="_ftnref1" title=""><span class=MsoFootnoteReference><sup><span
class=MsoFootnoteReference><u><sup><font size=3 color=blue
face="Times New Roman"><span style='font-size:12.0pt;font-family:"Times New Roman";
color:blue'>[1]</span></font></sup></u></span></sup></span></a><o:p></o:p></span></font></u></p>
<p class=MsoNormal><u><font size=3 color=blue face="Times New Roman"><span
style='font-size:12.0pt;color:blue'><o:p><span style='text-decoration:none'> </span></o:p></span></font></u></p>
<p class=MsoFootnoteText><sup><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>1</span></font></sup>Per this standard, the Frame
Relay Header Compression Control Protocol exchange is not required for header
compression to take place on the link. The alternate is that the use of
header compression is by prior arrangement and the associated parameters have
been pre-configured. This is the only option for header compression on a
one way link. Note that if header compression options are misconfigured
between sender and receiver, the link will not successfully pass IP packets, as
is true with any misconfiguration (e.g. Virtual Channel number used for IP over
AOS). For this reason, use of IP header compression negotiation is useful
and recommended where feasible.<o:p></o:p></p>
<p class=MsoFootnoteText><font size=3 face="Times New Roman"><o:p> </o:p></font></p>
<p class=MsoFootnoteText><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>Please let me know if you have any comments or
concerns about this proposed addition.<o:p></o:p></span></font></p>
<p class=MsoFootnoteText><font size=3 face="Times New Roman"><o:p> </o:p></font></p>
<p class=MsoFootnoteText><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>best regards,<o:p></o:p></span></font></p>
<p class=MsoFootnoteText><font size=3 face="Times New Roman"><o:p> </o:p></font></p>
<p class=MsoFootnoteText><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>Greg Kazz<o:p></o:p></span></font></p>
<p class=MsoFootnoteText><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>Chairman CCSDS SLS-SLP & SIS-IPO WGs<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'><o:p> </o:p></span></font></p>
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<div style='mso-element:footnote-list'><br clear=all>
<hr align=left size=1 width="33%">
<div style='mso-element:footnote' id=ftn1>
<p class=MsoFootnoteText><a style='mso-footnote-id:ftn1' href="#_ftnref1"
name="_ftn1" title=""><span class=MsoFootnoteReference><sup><font size=3
face="Times New Roman"><span style='font-size:12.0pt'><span
class=MsoFootnoteReference><sup><font size=3 face="Times New Roman"><span
style='font-size:12.0pt;font-family:"Times New Roman";layout-grid-mode:line'>[1]</span></font></sup></span></span></font></sup></span></a>
Per this standard, the Frame Relay Header Compression Control Protocol exchange
is not required for header compression to take place on the link. The alternate
is that the use of header compression is by prior arrangement and the
associated parameters have been pre-configured. This is the only option
for header compression on a one way link. Note that if header compression
options are misconfigured between sender and receiver, the link will not
successfully pass IP packets, as is true with any misconfiguration (e.g.
Virtual Channel number used for IP over AOS). For this reason, use of IP
header compression negotiation is useful and recommended where feasible.<o:p></o:p></p>
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