<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:st1="urn:schemas-microsoft-com:office:smarttags" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv=Content-Type content="text/html; charset=us-ascii">
<meta name=Generator content="Microsoft Word 11 (filtered medium)">
<!--[if !mso]>
<style>
v\:* {behavior:url(#default#VML);}
o\:* {behavior:url(#default#VML);}
w\:* {behavior:url(#default#VML);}
.shape {behavior:url(#default#VML);}
</style>
<![endif]--><o:SmartTagType
namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="PersonName"/>
<!--[if !mso]>
<style>
st1\:*{behavior:url(#default#ieooui) }
</style>
<![endif]-->
<style>
<!--
/* Font Definitions */
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
@font-face
{font-family:Verdana;
panose-1:2 11 6 4 3 5 4 4 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman";}
a:link, span.MsoHyperlink
{color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{color:#606420;
text-decoration:underline;}
span.EmailStyle17
{mso-style-type:personal;
font-family:Verdana;
color:windowtext;
font-weight:normal;
font-style:normal;
text-decoration:none none;}
span.EmailStyle18
{mso-style-type:personal-reply;
font-family:Verdana;
color:navy;
font-weight:normal;
font-style:normal;
text-decoration:none none;}
@page Section1
{size:8.5in 11.0in;
margin:1.0in 1.25in 1.0in 1.25in;}
div.Section1
{page:Section1;}
-->
</style>
</head>
<body lang=EN-US link=blue vlink="#606420">
<div class=Section1>
<p class=MsoNormal><font size=2 color=navy face=Verdana><span style='font-size:
10.0pt;font-family:Verdana;color:navy'>Hello List,<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'><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'>I have seen that when ever asterisk gets
a SIP INFO request from a SIP channel it generates the requested DTMF tone and
writes to the destination channel also it forwards the SIP INFO message. As I
am very new to this domain, it is really confusing me. Why not asterisk writes
only the tone and can avoid forwarding of SIP INFO? I know I may be wrongly interpreted
the things, Can somebody please explain me the scenario, if possible?<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'><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'>Thanks<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'>Rajib<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'><o:p> </o:p></span></font></p>
<div>
<div class=MsoNormal align=center style='text-align:center'><font size=3
face="Times New Roman"><span style='font-size:12.0pt'>
<hr size=2 width="100%" align=center tabindex=-1>
</span></font></div>
<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'> Deka, Rajib IN
MAA SL <br>
<b><span style='font-weight:bold'>Sent:</span></b> Monday, August 29, 2011 3:34
PM<br>
<b><span style='font-weight:bold'>To:</span></b> <st1:PersonName w:st="on">'asterisk-users@lists.digium.com'</st1:PersonName><br>
<b><span style='font-weight:bold'>Subject:</span></b> Asterisk is delaying DTMF
(SIP INFO) relay in MeetMe </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>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:11.0pt;
font-family:Verdana'>Hello List,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:11.0pt;
font-family:Verdana'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:11.0pt;
font-family:Verdana'>We are using ‘F’ parameter in meetme Dialplan
application to broadcast SIP INFO (1 and 0) as DTMF tone to all the
participants.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:11.0pt;
font-family:Verdana'>The DTMF configuration for all the connected SIP clients
is SIP INFO.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:11.0pt;
font-family:Verdana'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:11.0pt;
font-family:Verdana'>The problem we are seeing, asterisk is taking some time to
broadcast the SIP INFO message to all the participants from the time of its
appearance. The time latency varies from 1.5 sec to 6 sec. We have activated
the highest debug and verbose level but we are not able to track down the
problem. Please help us out to overcome this problem as 6 sec latency is not
acceptable in real-time scenarios. Also if possible let us know (technically),
whether it is a know issue in asterisk.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:11.0pt;
font-family:Verdana'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:11.0pt;
font-family:Verdana'>Regards,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:11.0pt;
font-family:Verdana'>Rajib<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:11.0pt;
font-family:Verdana'>Siemens Ltd. <o:p></o:p></span></font></p>
</div>
</body>
</html>