<div>I'm not familiar with this particular product.</div><div><br></div><div>But my guess is that if it is 4.1 CCM, it is probably based off packet capturing the signalling and media off the wire.</div><div><br></div><div>
So usually they sniff the SCCP and this signalling traffic is used to build tables of extension numbers to device IP addresses for instance.</div><div><br></div><div>Typically, in your recording software you then select which extensions to record. The software typically then applies filters to it's packet capturing process to exclude non-interesting traffic.</div>
<div><br></div><div>In terms of recording, it also uses the SCCP sniffing to figure out when a call is happening, and who is involved, and therefore which RTP media packets to pluck off the wire and put into a recording file.</div>
<div><br></div><div>So recorder placement, and what traffic you have spanning to it, can be important. i.e. you probably dont want to capture duplicate packets.</div><div><br></div><div>This is how it all used to work before SIP forking etc. Since you are on 4.1 think this is off the table anyway.</div>
<div><br></div><div>The key thing from the CM perspective is to make sure the recorders have visibility of both the SCCP and RTP packets required, and as you know these take different paths sometimes.</div><div><br></div>
<div>These products typically use common components such as WINPCAP (same as used in Ethereal and Wireshark).</div><div><br></div><div>As Ahmed says, it does sound like a software issue on their side.</div><div><br></div>
<div>The fact that it is crossing calls is strange, because it means their system, is taking audio from other conversations that it is not supposed to be listening to. i.e. Not correlating the media streams and correct involved call parties.</div>
<div><br></div><div>Hope that helps a bit.</div><div><br></div><div>Cheers,</div><div><br></div><div>Tim<br><br><div class="gmail_quote">On Sat, Oct 16, 2010 at 5:02 PM, Tahir Uddin <span dir="ltr"><<a href="mailto:tahir.uddin@riyadbank.com">tahir.uddin@riyadbank.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div lang="EN-US" style="word-wrap:break-word" vlink="purple" link="blue">
<div><span><font face="Arial" color="#0000ff" size="2">Thanks
Ahmed,</font></span></div>
<div><span><font face="Arial" color="#0000ff" size="2">Could
this be a version incompatibility issue, we are running CM 4.1 while the Etalk
software is one of the latest versions.</font></span></div>
<div><span><font face="Arial" color="#0000ff" size="2">Also, are there extenion numbers or other info in the wav files that
it might not be able to decipher. How does it identify the packets belonging to
one conversation?</font></span></div>
<div><span><font face="Arial" color="#0000ff" size="2"></font></span> </div>
<div><span><font face="Arial" color="#0000ff" size="2">Regards</font></span></div>
<div> </div><br>
<p><font face="Verdana" color="black" size="2">Tahir Uddin<br>Assistant Vice President
/ Information Technology Officer<br>Information Technology Division -
Mgmt.<br>Information Technology Division<br>Phone: +966-1-276-3000 ext.
5305<br>Email: <a href="mailto:tahir.uddin@riyadbank.com" target="_blank">tahir.uddin@riyadbank.com</a><br><br><b><font face="verdana" color="green" size="2"></font></b><br><b><font face="verdana" color="green" size="2"></font></b></font></p>
<br>
<div> </div><br>
<div lang="en-us" dir="ltr" align="left">
<hr>
<font face="Tahoma" size="2"><b>From:</b> Ahmed Elnagar
[mailto:<a href="mailto:ahmed_elnagar@rayacorp.com" target="_blank">ahmed_elnagar@rayacorp.com</a>] <br><b>Sent:</b> Wednesday, October 13, 2010
6:50 PM<br><b>To:</b> Tahir Uddin<br><b>Cc:</b> voyp list<br><b>Subject:</b> RE:
[cisco-voip] Voice recording issue<br></font><br></div><div><div></div><div class="h5">
<div></div>
<div>
<p class="MsoNormal"><span style="font-size:11pt;color:#1f497d">It
must be a problem in the recording servers in interpreting the sniffed voice
streams and reconstructing the wav files, I saw this problem a lot in other
product and every time it happen the vendor has to change their
code!!!</span></p>
<p class="MsoNormal"><span style="font-size:11pt;color:#1f497d"> </span></p>
<div>
<div>
<p class="MsoNormal" style="background:white"><span style="font-size:10pt;color:#1f497d"> </span><span style="font-size:10.5pt;color:#1f497d">Best
Regards;</span></p>
<p class="MsoNormal" style="background:white"><span style="font-size:10.5pt;color:#1f497d">
Ahmed Elnagar</span></p>
<p class="MsoNormal" style="background:white"><span style="font-size:10.5pt;color:#1f497d">
Senior Network PS Engineer</span></p>
<p class="MsoNormal" style="background:white"><span style="font-size:10.5pt;color:#1f497d">
Mob: +2019-0016211</span></p>
<p class="MsoNormal" style="background:white"><span style="font-size:10.5pt;color:#1f497d">
CCIE#24697 (Voice)</span></p>
<p class="MsoNormal" style="background:white"><span style="font-size:10.5pt;color:#1f497d"> <img height="63" alt="ccie_voice_large.gif" src="cid:114185905@16102010-055F" width="63"></span></p></div></div>
<p class="MsoNormal"><span style="font-size:11pt;color:#1f497d"> </span></p>
<div>
<div style="border-right:medium none;padding-right:0in;border-top:#b5c4df 1pt solid;padding-left:0in;padding-bottom:0in;border-left:medium none;padding-top:3pt;border-bottom:medium none">
<p class="MsoNormal"><b><span style="font-size:10pt">From:</span></b><span style="font-size:10pt">
<a href="mailto:cisco-voip-bounces@puck.nether.net" target="_blank">cisco-voip-bounces@puck.nether.net</a> [mailto:<a href="mailto:cisco-voip-bounces@puck.nether.net" target="_blank">cisco-voip-bounces@puck.nether.net</a>]
<b>On Behalf Of </b>Tahir Uddin<br><b>Sent:</b> Wednesday, October 13, 2010 4:25
PM<br><b>To:</b> voyp list<br><b>Subject:</b> [cisco-voip] Voice recording
issue</span></p></div></div>
<p class="MsoNormal"> </p>
<div>
<p class="MsoNormal"> </p></div>
<div>
<p class="MsoNormal"> </p></div>
<div>
<p class="MsoNormal"><span style="font-size:10pt;color:blue">Hi,
</span></p></div>
<div>
<p class="MsoNormal"><span style="font-size:10pt;color:blue">We have
call manager express and Etalk recorders</span></p></div>
<div>
<p class="MsoNormal"><span style="font-size:10pt;color:blue">We have
an issue where the recording files for each call is getting mixed up. When agent
A talks to customer A and agent B talks to customer B, in the recording files,
we hear agent A interlaced with customer B. Has anyone come across this issue.
</span></p></div>
<div>
<p class="MsoNormal"><span style="font-size:10pt;color:blue">I am
probably not providing enough information on this, just wanted to get an initial
take to start out.</span></p></div>
<div>
<p class="MsoNormal"> </p></div>
<div>
<p class="MsoNormal"><span style="font-size:10pt;color:blue">Regards</span></p></div>
<div>
<p class="MsoNormal"><span style="font-size:10pt;color:blue">Tahir</span></p></div>
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