Perhaps it is a firmware bug. I'm going to check with the manufacturer. <br>
<br>
By the way, this ATA is a UTstarcom iAN-02EX in case you're wondering.<br>
<br>
Regards,<br>
Paul<br><br><div><span class="gmail_quote">On 4/15/05, <b class="gmail_sendername">Alex Vishnev</b> <<a href="mailto:avishnev@optonline.net">avishnev@optonline.net</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">Paul,</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">Sorry it this was unclear.<span> </span>I meant to say that I don't think UA
should respond with ACK to provisional response (i.e. 100 Trying). I just
scanned through an RFC and did not see anywhere where it says provisional
responses should be <span>ACKed</span>. Also, I am unclear on why
UA changed CSEQ. <span>Any ideas on that?</span></span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">Alex</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
<div>
<div style="text-align: center;" align="center"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">
<hr align="center" size="2" width="100%">
</span></font></div>
<p><b><font face="Tahoma" size="2"><span style="font-size: 10pt; font-family: Tahoma; font-weight: bold;">From:</span></font></b><font face="Tahoma" size="2"><span style="font-size: 10pt; font-family: Tahoma;"> Java Rockx [mailto:
<a href="mailto:javarockx@gmail.com" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">javarockx@gmail.com</a>] <br>
<b><span style="font-weight: bold;">Sent:</span></b> Friday, April 15, 2005 2:12
PM<br>
<b><span style="font-weight: bold;">To:</span></b> Alex Vishnev<br>
<b><span style="font-weight: bold;">Cc:</span></b> <a href="mailto:serusers@iptel.org" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">serusers@lists.iptel.org</a><br>
<b><span style="font-weight: bold;">Subject:</span></b> Re: [Serusers] Another
Looping Question</span></font></p>
</div><div><span class="e" id="q_1034714a876cb70b_1">
<p><font face="Times New Roman" size="3"><span style="font-size: 12pt;"> </span></font></p>
<p style="margin-bottom: 12pt;"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">Thanks Alex.<br>
<br>
So just to be clear, are you saying this:<br>
<br>
1) When ser receives an INVITE it does not need to reply with "100
Trying"<br>
<br>
2) When the SER tm module sends back the 100 Trying, the SIP UA should not be
changing the Cseq header?<br>
<br>
Regards,<br>
Paul</span></font></p>
<div>
<p><span><font face="Times New Roman" size="3"><span style="font-size: 12pt;">On 4/15/05, <b><span style="font-weight: bold;">Alex
Vishnev</span></b> <<a href="mailto:avishnev@optonline.net" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">avishnev@optonline.net</a>>
wrote:</span></font></span></p>
<div>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">Paul,</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">It looks like UA ACK 100 Trying. First of all I don't believe
this is needed. Second of all, it changes CSEQ from 101 INVITE to 100. I think
that's not valid at all. </span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">HTH</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;">Alex</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
<div>
<div style="text-align: center;" align="center"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">
<hr align="center" size="2" width="100%">
</span></font></div>
<p><b><font face="Tahoma" size="2"><span style="font-size: 10pt; font-family: Tahoma; font-weight: bold;">From:</span></font></b><font face="Tahoma" size="2"><span style="font-size: 10pt; font-family: Tahoma;"> <a href="mailto:serusers-bounces@lists.iptel.org" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">
serusers-bounces@lists.iptel.org</a>
[mailto:<a href="mailto:serusers-bounces@lists.iptel.org" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">
serusers-bounces@lists.iptel.org</a>] <b><span style="font-weight: bold;">On Behalf Of </span></b>Java Rockx<br>
<b><span style="font-weight: bold;">Sent:</span></b> Friday, April 15, 2005 10:46
AM<br>
<b><span style="font-weight: bold;">To:</span></b> <a href="mailto:serusers@iptel.org" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">serusers@lists.iptel.org</a><br>
<b><span style="font-weight: bold;">Subject:</span></b> [Serusers] Another
Looping Question</span></font></p>
</div>
<div><span>
<p><font face="Times New Roman" size="3"><span style="font-size: 12pt;"> </span></font></p>
<p style="margin-bottom: 12pt;"><font face="Times New Roman" size="3"><span style="font-size: 12pt;">Hi All.<br>
<br>
Below is a snippet of an INVITE and you can see the usual "trying - your
call is important to us" in the dialog. Anyhow, for some reason SER
occasionally attempts to sent the ACK to itself, which causes a looping
condition. The last ACK shown is the start of the looping condition.<br>
<br>
It only happens on occasion. SER should have consumed the ACK rather than
attempted to forward it.<br>
<br>
Can anyone explain this?<br>
<br>
Regards,<br>
Paul<br>
<br>
IP Legend<br>
-------------------<br>
<a href="http://10.3.0.221" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">10.3.0.221</a> - SER (behind a
Cisco 3600 so ALG rewrote the IPs)<br>
<a href="http://69.36.46.178" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">69.36.46.178</a> - NATed SIP UA<br>
<br>
U 2005/04/15 02:19:16.252614 <a href="http://69.35.46.178:5060" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">69.35.46.178:5060</a>
-> <a href="http://10.3.0.221:5060" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">10.3.0.221:5060</a><br>
INVITE <a href="mailto:sip:8187768080@sipdev.mycompany.net" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">sip:8187768080@sipdev.mycompany.net</a>
SIP/2.0.<br>
Via: SIP/2.0/UDP <a href="http://192.168.1.102:5060" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">192.168.1.102:5060</a>;branch=z9hG4bK3915905414.<br>
From: Test User <<a href="mailto:sip:3215591439@sipdev.mycompany.net" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">sip:3215591439@sipdev.mycompany.net</a>>;tag=1465261089.<br>
To: <<a href="mailto:sip:8187768080@sipdev.mycompany.net" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">sip:8187768080@sipdev.mycompany.net</a>>.<br>
Call-ID: <a href="mailto:2671219156@192.168.1.102" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">2671219156@192.168.1.102</a>.<br>
CSeq: 101 INVITE.<br>
Contact: <sip:3215591439@192.168.1.102:5060>.<br>
Proxy-Authorization: Digest username="3215591439", realm="<a href="http://sipdev.mycompany.net" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">sipdev.mycompany.net</a>",
nonce="425f5e0de25efdb3f5a6125dcf2147bf30fe9177", uri="<a href="mailto:sip:8187768080@sipdev.mycompany.net" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">sip:8187768080@sipdev.mycompany.net
</a>", response="61996c3bdc10990fec7e245751777516",
algorithm=MD5, cnonce="ae02e47a3355bada49ce344c92f48587", qop=auth,
nc=00000002. max-forwards: 70.<br>
Allow: INVITE, ACK, CANCEL, BYE, REFER, NOTIFY.<br>
Content-Type: application/sdp.<br>
Content-Length: 180.<br>
.<br>
v=0.<br>
o=- 32014 3005 IN IP4 <a href="http://192.168.1.102" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">192.168.1.102</a>.<br>
s=-.<br>
c=IN IP4 <a href="http://192.168.1.102" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">192.168.1.102</a>.<br>
t=0 0.<br>
m=audio 13456 RTP/AVP 18 0 8 2 4 101.<br>
a=rtpmap:101 telephone-event/8000.<br>
a=fmtp:101 0-15.<br>
a=ptime:20.<br>
.<br>
<br>
#<br>
U 2005/04/15 02:19:16.276216 <a href="http://10.3.0.221:5060" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">10.3.0.221:5060</a>
-> <a href="http://69.35.46.178:5060" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">69.35.46.178:5060</a><br>
SIP/2.0 100 trying -- your call is important to us.<br>
Via: SIP/2.0/UDP <a href="http://192.168.1.102:5060" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">192.168.1.102:5060</a>;branch=z9hG4bK3915905414;rport=5060;received=<a href="http://69.35.46.178" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">
69.35.46.178</a>.<br>
From: Test User <<a href="mailto:sip:3215591439@sipdev.mycompany.net" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">sip:3215591439@sipdev.mycompany.net</a>>;tag=1465261089.<br>
To: <<a href="mailto:sip:8187768080@sipdev.myvox.net" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">sip:8187768080@sipdev.myvox.net</a>>.<br>
Call-ID: <a href="mailto:2671219156@192.168.1.102" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">2671219156@192.168.1.102</a>.<br>
CSeq: 101 INVITE.<br>
Content-Length: 0.<br>
.<br>
<br>
#<br>
U 2005/04/15 02:19:16.792795 <a href="http://69.35.46.178:5060" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">69.35.46.178:5060</a>
-> <a href="http://10.3.0.221:5060" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">10.3.0.221:5060</a><br>
ACK <a href="mailto:sip:8187768080@sipdev.mycompany.net" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">sip:8187768080@sipdev.mycompany.net</a>
SIP/2.0.<br>
Via: SIP/2.0/UDP <a href="http://192.168.1.102:5060" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">192.168.1.102:5060</a>;branch=z9hG4bK3499714875.<br>
From: Test User <<a href="mailto:sip:3215591439@sipdev.mycompany.net" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">sip:3215591439@sipdev.mycompany.net</a>>;tag=1465261089.<br>
To: <<a href="mailto:sip:8187768080@sipdev.mycompany.net" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">sip:8187768080@sipdev.mycompany.net</a>>;tag=cdbfe46960d7566fcbe09f199f2b328d.c2bb.<br>
Call-ID: <a href="mailto:2671219156@192.168.1.102" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">2671219156@192.168.1.102</a>.<br>
CSeq: 100 ACK.<br>
Content-Length: 0.<br>
.<br>
<br>
#<br>
U 2005/04/15 02:19:16.912146 <a href="http://10.3.0.221:5060" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">10.3.0.221:5060</a>
-> <a href="http://10.3.0.221:5060" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">10.3.0.221:5060</a><br>
ACK <a href="mailto:sip:8187768080@sipdev.mycompany.net" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">sip:8187768080@sipdev.mycompany.net</a>
SIP/2.0.<br>
Max-Forwards: 10.<br>
Record-Route: <sip:<a href="http://10.3.0.221" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">10.3.0.221</a>;ftag=1465261089;lr>.<br>
Via: SIP/2.0/UDP <a href="http://10.3.0.221" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">10.3.0.221</a>;branch=0.<br>
Via: SIP/2.0/UDP <a href="http://192.168.1.102:5060" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">192.168.1.102:5060</a>;received=<a href="http://69.35.46.178" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">
69.35.46.178</a>;branch=z9hG4bK3499714875.<br>
From: Test User <<a href="mailto:sip:3215591439@sipdev.mycompany.net" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">sip:3215591439@sipdev.mycompany.net</a>>;tag=1465261089.<br>
To: <<a href="mailto:sip:8187768080@sipdev.mycompany.net" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">sip:8187768080@sipdev.mycompany.net</a>>;tag=cdbfe46960d7566fcbe09f199f2b328d.c2bb.<br>
Call-ID: <a href="mailto:2671219156@192.168.1.102" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">2671219156@192.168.1.102</a>.<br>
CSeq: 100 ACK.<br>
Content-Length: 0.<br>
P-hint: Local Destination.</span></font></p>
</span></div>
</div>
<p style="margin-bottom: 12pt;"><font face="Times New Roman" size="3"><span style="font-size: 12pt;"><br>
_______________________________________________<br>
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<br>
</span></font></p>
</div>
<p><font face="Times New Roman" size="3"><span style="font-size: 12pt;"> </span></font></p>
</span></div></div>
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