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<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=243263323-03032003>Kevin,</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=243263323-03032003></SPAN></FONT> </DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN class=243263323-03032003>I
initially sent the packet:</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=243263323-03032003></SPAN></FONT> </DIV><SPAN
class=243263323-03032003>
<DIV><FONT face=Arial color=#0000ff size=2>> > > This is that packet
that came from the last 200 OK <- PROXY:</FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2>> > ></FONT> </DIV>
<DIV><FONT face=Arial color=#0000ff size=2>> > > #</FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2>> > > U 2003/02/24
07:56:52.503535 216.87.144.203:5060 -></FONT> </DIV>
<DIV><FONT face=Arial color=#0000ff size=2>> >
216.87.145.22:5060</FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2>> > > SIP/2.0 200
OK.</FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2>> > > Via: SIP/2.0/UDP
216.87.145.22:5060;branch=z9hG4bK-ng5tokyx448r.</FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2>> > > From: "snom man"
<sip:4695461245@augustvoice.net>;tag=8u6ju8wxuc.</FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2>> > > To:
<sip:2143357976@augustvoice.net;user=phone>;tag=3CBB0360-532.</FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2>> > > Date: Mon, 24 Feb 2003
13:56:43 GMT.</FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2>> > > Call-ID:
3c267202b6a8-lgseu8olovlp@216.87.145.22.</FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2>> > > Server:
Cisco-SIPGateway/IOS-12.x.</FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2>> > > CSeq: 2
INVITE.</FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2>> > > Session-Expires:
7200;refresher=uac.</FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2>> > > Require:
timer.</FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2>> > > Allow-Events:
telephone-event.</FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2>> > > Contact:
<sip:92143357976@216.87.144.196:5060;user=phone>.</FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2>> > > Record-Route:
<sip:2143357976@216.87.144.203;ftag=8u6ju8wxuc;lr>.</FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2>> > > Content-Type:
application/sdp.</FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2>> > > Content-Length:
209.</FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2>> > > .</FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2>> > > v=0.</FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2>> > >
o=CiscoSystemsSIP-GW-UserAgent 7543 5694 IN IP4 216.87.144.196.</FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2>> > > s=SIP
Call.</FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2>> > > c=IN IP4
216.87.144.196.</FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2>> > > t=0 0.</FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2>> > > m=audio 16632 RTP/AVP
0 100.</FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2>> > > a=rtpmap:0
PCMU/8000.</FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2>> > > a=rtpmap:100
X-NSE/8000.</FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2>> > > a=fmtp:100
192-194.</FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2>> > ></FONT> </DIV>
<DIV><FONT face=Arial color=#0000ff size=2></FONT> </DIV>
<DIV><SPAN class=243263323-03032003><FONT face=Arial color=#0000ff size=2>This
is the 200 OK (response to the INVITE) message as delivered to the
phone.</FONT></SPAN></DIV>
<DIV><SPAN class=243263323-03032003><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=243263323-03032003><FONT face=Arial color=#0000ff size=2>I
couldn't figure out what you were saying, so I went back to</FONT></SPAN></DIV>
<DIV><SPAN class=243263323-03032003><FONT face=Arial color=#0000ff size=2>the
ethereal trace. After the snom phone receives a 183
status</FONT></SPAN></DIV>
<DIV><SPAN class=243263323-03032003><FONT face=Arial color=#0000ff
size=2>message, it sends a PRACK to the PROXY. This PRACK
is</FONT></SPAN></DIV>
<DIV><SPAN class=243263323-03032003><FONT face=Arial color=#0000ff size=2>OKed,
without a Record-route. The next message is an OK</FONT></SPAN></DIV>
<DIV><SPAN class=243263323-03032003><FONT face=Arial color=#0000ff
size=2>responding to the original INVITE, which does indeed have a
Record-Route.</FONT></SPAN></DIV>
<DIV><SPAN class=243263323-03032003><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=243263323-03032003><FONT face=Arial color=#0000ff size=2>So,
you are saying that the OK to your PRACK needs a record
route?</FONT></SPAN></DIV>
<DIV><SPAN class=243263323-03032003><FONT face=Arial color=#0000ff size=2>I can
do that I think, because the OK to the INVITE does indeed
have</FONT></SPAN></DIV>
<DIV><SPAN class=243263323-03032003><FONT face=Arial color=#0000ff size=2>a
Record-route.</FONT></SPAN></DIV>
<DIV><SPAN class=243263323-03032003><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=243263323-03032003><FONT face=Arial color=#0000ff size=2>I
don't even know what a PRACK is for...</FONT></SPAN></DIV>
<DIV><SPAN class=243263323-03032003><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=243263323-03032003><FONT face=Arial color=#0000ff
size=2>---greg</FONT></SPAN></DIV>
<DIV><SPAN class=243263323-03032003><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=243263323-03032003><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV></SPAN>
<BLOCKQUOTE dir=ltr
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px solid; MARGIN-RIGHT: 0px">
<DIV></DIV>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left><FONT
face=Tahoma size=2>-----Original Message-----<BR><B>From:</B> Kevin
[mailto:kmoroz@abpintl.com] <BR><B>Sent:</B> Monday, March 03, 2003 5:19
PM<BR><B>To:</B> Greg Fausak<BR><B>Cc:</B> 'Robert Messer'<BR><B>Subject:</B>
FW: Snom phone (fwd)<BR><BR></FONT></DIV>
<DIV class=Section1>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Hi Greg,
<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"><SPAN
style="mso-spacerun: yes"> </SPAN>Sorry it took so long to get
back to you.<SPAN style="mso-spacerun: yes"> </SPAN>Normally it is
faster but as I stated the SIP inter-<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><SPAN class=GramE><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">operability</SPAN></FONT></SPAN><FONT
face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"> was last week which
caused the delay.<SPAN style="mso-spacerun: yes"> </SPAN>Looks like the
issue is with the <o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><SPAN class=GramE><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">SER
proxy.</SPAN></FONT></SPAN><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"><SPAN
style="mso-spacerun: yes"> </SPAN>If I knew the specification deeper I
should have been able to answer it myself. <SPAN
style="mso-spacerun: yes"> </SPAN>Engineering cc’s <SPAN
class=SpellE>Jiri</SPAN> on their response to me so he is aware of the
issue.<SPAN style="mso-spacerun: yes">
</SPAN><o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Regards,<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><st1:PersonName
style="BACKGROUND-POSITION: left bottom; BACKGROUND-IMAGE: url(res://ietag.dll/#34/#1001); BACKGROUND-REPEAT: repeat-x"><FONT
face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Kevin</SPAN></FONT></st1:PersonName><FONT
face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"><o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Tahoma size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">-----Original
Message-----<BR><B><SPAN style="FONT-WEIGHT: bold"><SPAN
style="mso-spacerun: yes"> </SPAN></SPAN></B></SPAN></FONT><FONT
face=Verdana color=blue size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Verdana"><o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Verdana color=blue size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Verdana"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Verdana color=blue size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Verdana; mso-ansi-language: EN-GB">The
phone up</SPAN></FONT><st1:PersonName
style="BACKGROUND-POSITION: left bottom; BACKGROUND-IMAGE: url(res://ietag.dll/#34/#1001); BACKGROUND-REPEAT: repeat-x"><FONT
face=Verdana color=blue size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Verdana; mso-ansi-language: EN-GB">da</SPAN></FONT></st1:PersonName><FONT
face=Verdana color=blue size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Verdana; mso-ansi-language: EN-GB">tes
the route until it receives a 2xx code. The 200 Ok response does not contain
such a route therefore the phone uses the last route it receives in the 200 –
which is empty. Therefore, the phone MUST send the ACK directly to the
gateway. <o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Verdana color=blue size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Verdana; mso-ansi-language: EN-GB"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Verdana color=blue size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Verdana; mso-ansi-language: EN-GB">§
12.1.2 of the RFC3261. The dialog is NOT established by the 401-challened
request.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Verdana color=blue size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Verdana; mso-ansi-language: EN-GB"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Verdana color=blue size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Verdana; mso-ansi-language: EN-GB">The
proxy can very easily solve the problem by putting itself into the routing
path of the 200 Ok.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Verdana color=blue size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Verdana; mso-ansi-language: EN-GB"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Verdana color=blue size=2><SPAN lang=EN-GB
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: Verdana; mso-ansi-language: EN-GB"><o:p> </o:p></SPAN></FONT></P>
<DIV
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<P class=MsoPlainText><FONT face="Courier New" color=navy size=2><SPAN
lang=EN-GB style="FONT-SIZE: 10pt; COLOR: navy"><SPAN
style="mso-spacerun: yes"> </SPAN></SPAN></FONT><SPAN lang=EN-GB><SPAN
style="mso-spacerun: yes"> </SPAN></SPAN><o:p></o:p></P></DIV></DIV></BLOCKQUOTE></BODY></HTML>