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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>thanx ryan..<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Wingdings><span
style='font-size:10.0pt;font-family:Wingdings;color:navy'>J</span></font><font
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color:navy'>..<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>i'll try..it makes sense..<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>regards..<o:p></o:p></span></font></p>
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10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><strong><b><font size=2 color=navy face=Verdana><span
style='font-size:10.0pt;font-family:Verdana;color:navy'>Sinisa Djokic</span></font></b></strong><font
size=2 color=navy face=Verdana><span style='font-size:10.0pt;font-family:Verdana;
color:navy'> </span></font><font color=navy><span style='color:navy'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Verdana><span style='font-size:
10.0pt;font-family:Verdana;color:navy'>System Engineer</span></font><font
color=navy><span style='color:navy'><br>
</span></font><font size=2 color=navy face=Verdana><span style='font-size:10.0pt;
font-family:Verdana;color:navy'>CCNP,CCDA,CQS-CWLDS,CS-CIPTDS,CS-CIPCCES Cisco
Certified</span></font><font color=navy><span style='color:navy'><o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=1 color=navy face=Verdana><span
style='font-size:7.5pt;font-family:Verdana;color:navy'>MDS Informaticki
inzenjering</span></font><font color=navy><span style='color:navy'><br>
</span></font><font size=1 color=navy face=Verdana><span style='font-size:
7.5pt;font-family:Verdana;color:navy'>Bul. Arsenija Carnojevica 170</span></font><font
color=navy><span style='color:navy'><br>
</span></font><font size=1 color=navy face=Verdana><span style='font-size:
7.5pt;font-family:Verdana;color:navy'>11070 Novi <st1:place w:st="on"><st1:City
w:st="on">Beograd</st1:City>, <st1:country-region w:st="on">Serbia</st1:country-region></st1:place></span></font><font
color=navy><span style='color:navy'><br>
</span></font><font size=1 color=navy face=Verdana><span style='font-size:
7.5pt;font-family:Verdana;color:navy'>Tel: +381 11 2015 200, 2015 273</span></font><font
color=navy><span style='color:navy'><br>
</span></font><font size=1 color=navy face=Verdana><span style='font-size:
7.5pt;font-family:Verdana;color:navy'>Fax: +381 11 3194 954</span></font><font
color=navy><span style='color:navy'><br>
</span></font><font size=1 color=navy face=Arial><span style='font-size:7.5pt;
font-family:Arial;color:navy'><a href="http://www.mds.rs">www.mds.rs</a></span></font><font
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</span></font><font size=1 color=navy face=Arial><span style='font-size:7.5pt;
font-family:Arial;color:navy'><a href="mailto:sdjokic@mds.rs">sdjokic@mds.rs</a></span></font><font
color=navy><span style='color:navy'><o:p></o:p></span></font></p>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'> Ryan Ratliff
[mailto:rratliff@cisco.com] <br>
<b><span style='font-weight:bold'>Sent:</span></b> Friday, October 10, 2008
4:12 PM<br>
<b><span style='font-weight:bold'>To:</span></b> 'Djokic Sinisa'; 'cisco voip'<br>
<b><span style='font-weight:bold'>Subject:</span></b> RE: [cisco-voip] CCM
4.1(3) audio delay !!!</span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=blue face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:blue'>What is the RTT between the gateway and
the CCM? If you are doing H.323 slow start then the H.245 negotiation is
probably what is slowing you down. I'd start by enabling fast-start
inbound on the gateway page in CCMAdmin and going from there. The router
should try fast-start by default.</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=blue face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:blue'>If it's not the media negotiation causing
this then you need to do some digging into debugs at the router and CCM
traces. Compare when CCM sends the StartMediaTransmission to the phone
versus when the phone starts to send audio. Do the same
for when the phone sends the OpenReceiveChannelAck to CCM and when it starts to
receive audio. A packet capture at the phone will help with this.</span></font><o:p></o:p></p>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<p><font size=2 face="Times New Roman"><span style='font-size:10.0pt'><!-- Converted from text/plain format -->-Ryan
</span></font><o:p></o:p></p>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
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12.0pt'><o:p> </o:p></span></font></p>
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<p class=MsoNormal style='margin-bottom:12.0pt'><b><font size=2 face=Tahoma><span
style='font-size:10.0pt;font-family:Tahoma;font-weight:bold'>From:</span></font></b><font
size=2 face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
cisco-voip-bounces@puck.nether.net [mailto:cisco-voip-bounces@puck.nether.net] <b><span
style='font-weight:bold'>On Behalf Of </span></b>Djokic Sinisa<br>
<b><span style='font-weight:bold'>Sent:</span></b> Friday, October 10, 2008
2:12 AM<br>
<b><span style='font-weight:bold'>To:</span></b> 'cisco voip'<br>
<b><span style='font-weight:bold'>Subject:</span></b> [cisco-voip] CCM 4.1(3)
audio delay !!!</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>hi group..<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>does anybody has an idea what could be the cause of the
following problem..<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>we have a CCM4.1(3) cluster with 2x 2851 as a h323
gateways..the phones are 7912, 7940, 7960 and 7970..<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>the problem is as follows..<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>when external caller makes a call to IP phone inside a CCM
cluster the call comes over PSTN and PRI..<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>the IP phone rings, somebody answers the phone..caller
starts to talk immedialtely..for first 2-3 seconds person on the IP phone
cannot hear anything, and after that interval everything is fine..no
conversation is lost..just for first 2-3 seconds it looks like conversation is
delayed but not lost, and afterwards everything is fine..<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>in opposite direction..<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>when IP phone makes a call to some external number over the
PSTN and PRI..external phone rings..somebody answers.. caller starts to talk
immedialtely.. external phone can hear a caller from IP phone side but have
lost first 2-3 seconds of conversation..afterwards everything is fine..<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>ther is no firewall between any of the devices, everything
is clear..<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>any ideas?..<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>thanx..<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>regards..<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><strong><b><font size=2 face=Verdana><span style='font-size:
10.0pt;font-family:Verdana'>Sinisa Djokic</span></font></b></strong><font
size=2 face=Verdana><span style='font-size:10.0pt;font-family:Verdana'> </span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'>System Engineer</span></font><br>
<font size=2 face=Verdana><span style='font-size:10.0pt;font-family:Verdana'>CCNP,CCDA,CQS-CWLDS,CS-CIPTDS,CS-CIPCCES
Cisco Certified</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=1 face=Verdana><span style='font-size:7.5pt;
font-family:Verdana'>MDS Informaticki inzenjering</span></font><br>
<font size=1 face=Verdana><span style='font-size:7.5pt;font-family:Verdana'>Bul.
Arsenija Carnojevica 170</span></font><br>
<font size=1 face=Verdana><span style='font-size:7.5pt;font-family:Verdana'>11070
Novi <st1:place w:st="on"><st1:City w:st="on">Beograd</st1:City>, <st1:country-region
w:st="on">Serbia</st1:country-region></st1:place></span></font><br>
<font size=1 face=Verdana><span style='font-size:7.5pt;font-family:Verdana'>Tel:
+381 11 2015 200, 2015 273</span></font><br>
<font size=1 face=Verdana><span style='font-size:7.5pt;font-family:Verdana'>Fax:
+381 11 3194 954</span></font><br>
<font size=1 face=Arial><span style='font-size:7.5pt;font-family:Arial'><a
href="http://www.mds.rs">www.mds.rs</a></span></font><br>
<font size=1 face=Arial><span style='font-size:7.5pt;font-family:Arial'><a
href="mailto:sdjokic@mds.rs">sdjokic@mds.rs</a></span></font><o:p></o:p></p>
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