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<p class="MsoNormal"><span style="color:#1F497D">Daniel,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">My understanding trying to not directly copy&paste CUCM source code is that a MediaManager process is created whenever an Media Offer is received that needs a corresponding Media Answer. In the case of Prack
being disabled, an answer wouldn’t be necessary so we don’t need to create a new MediaManager process for this.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Still going through the code to see when the MXTimeout timer is turned off. The problem is it’s in a subroutine that gets called in a lot of different scenarios. I’m trying to find a corresponding trace line
that would print in a few of the scenarios.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Brian<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Daniel Pagan [mailto:dpagan@fidelus.com]
<br>
<b>Sent:</b> Tuesday, October 15, 2013 1:31 PM<br>
<b>To:</b> Brian Meade (brmeade); cisco-voip@puck.nether.net<br>
<b>Subject:</b> RE: CCM Trace Questions | MediaMgr<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="color:#404040">Brian:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#404040"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#404040">Thanks for the answer.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#404040"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#404040">Another question on MediaManager… Is a new MediaManager process created when very specific events are witnessed by CUCM? I guess another way to ask this would be, is it safe to say the creation of a new MediaManager
process is initiated by specific events during the call, received by the outbound call-leg, and vary from protocol to protocol? I’m aware it’s during the media connection attempt for two CIs, but I’m hoping to get some more detailed information.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#404040"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#404040">Here’s an example of what I’m referring to… Audio cut through (MediaMgr creation) occurs for outbound call-leg events such as:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#404040"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="color:#404040">CUCM</span></b><span style="color:#404040">
</span><span style="font-family:Wingdings;color:#404040">ß</span><span style="color:#404040"> 183 w/ SDP<o:p></o:p></span></p>
<p class="MsoNormal"><i><span style="color:#C00000">==PRACK is enabled==<o:p></o:p></span></i></p>
<p class="MsoNormal"><i><span style="color:#C00000">==MediaMgr gets created, audio cut through is attempted==<o:p></o:p></span></i></p>
<p class="MsoNormal"><b><span style="color:#404040">CUCM</span></b><span style="color:#404040">
</span><span style="font-family:Wingdings;color:#404040">à</span><span style="color:#404040"> PRACK w/ SDP<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#404040"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#404040">However, I don’t see CUCM attempting audio cut through in the following scenario:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#404040"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="color:#404040">CUCM</span></b><span style="color:#404040">
</span><span style="font-family:Wingdings;color:#404040">ß</span><span style="color:#404040"> 183 w/ SDP<o:p></o:p></span></p>
<p class="MsoNormal"><i><span style="color:#C00000">==PRACK is disabled==<o:p></o:p></span></i></p>
<p class="MsoNormal"><i><span style="color:#C00000">==MediaMgr is not created==<o:p></o:p></span></i></p>
<p class="MsoNormal"><span style="color:#404040">..<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#404040">…<o:p></o:p></span></p>
<p class="MsoNormal"><b><span style="color:#404040">CUCM </span></b><span style="font-family:Wingdings;color:#404040">ß</span><span style="color:#404040"> 200 w/ SDP eventually received<o:p></o:p></span></p>
<p class="MsoNormal"><i><span style="color:#C00000">==MediaMgr gets created, audio cut through is attempted==<o:p></o:p></span></i></p>
<p class="MsoNormal"><b><span style="color:#404040">CUCM</span></b><span style="color:#404040">
</span><span style="font-family:Wingdings;color:#404040">à</span><span style="color:#404040"> ACK w/ SDP<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#404040"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#404040">Because MediaManager is created <b>
between</b> the Rx 183 and Tx PRACK, and I see no creation after Rx 183 when PRACK is disabled, this makes me think that, at a programming level, the creation of MediaManager is tied to very specific events witnessed by CUCM
<i>combined</i> with configurations on the called device. Something like this (forgive me… I’m no programmer… just trying to lay out my thoughts)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#404040">
<o:p></o:p></span></p>
<p class="MsoNormal"><b><span style="color:#404040">On the outbound leg, create new MediaMgr process and attempt media exchange:<o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="color:#404040">IF (Received ISDN Msg = Progress){<o:p></o:p></span></p>
<p class="MsoNormal"><i><span style="color:#404040">Create new MediaManager Process<o:p></o:p></span></i></p>
<p class="MsoNormal"><span style="color:#404040">}<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#404040">ELSE IF (Received SCCP Answer = True){<o:p></o:p></span></p>
<p class="MsoNormal"><i><span style="color:#404040">Create new MediaManager Process<o:p></o:p></span></i></p>
<p class="MsoNormal"><span style="color:#404040">}<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#404040">ELSE IF (Received SIP Msg = 183 offer
<b>AND</b> PRACK = enabled){<o:p></o:p></span></p>
<p class="MsoNormal"><i><span style="color:#404040">Create new MediaManager Process<o:p></o:p></span></i></p>
<p class="MsoNormal"><span style="color:#404040">}<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#404040">ELSE Do nothing..<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#404040"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#404040">My apologies for the long winded email. Is this order of operations correct? I’m pretty much thinking while typing and trying to understand how this process is initiated by CUCM in a more detailed way than just
“whenever it’s time to establish audio”.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#404040"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#404040">Serious thanks you again if you made it to the end of the email
</span><span style="font-family:Wingdings;color:#404040">J</span><span style="color:#404040"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#404040"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#404040">Daniel<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#404040"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Brian Meade (brmeade) [<a href="mailto:brmeade@cisco.com">mailto:brmeade@cisco.com</a>]
<br>
<b>Sent:</b> Tuesday, October 15, 2013 11:58 AM<br>
<b>To:</b> Daniel Pagan; <a href="mailto:cisco-voip@puck.nether.net">cisco-voip@puck.nether.net</a><br>
<b>Subject:</b> RE: CCM Trace Questions | MediaMgr<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="color:#1F497D">Daniel,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">For your second question, those capabilities are the equivalent SCCP capabilities. Unfortunately, the SCCP codec mapping is technically Cisco confidential so I can’t share that table.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Working on getting an answer on your first question.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Thanks,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Brian Meade<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> cisco-voip [<a href="mailto:cisco-voip-bounces@puck.nether.net">mailto:cisco-voip-bounces@puck.nether.net</a>]
<b>On Behalf Of </b>Daniel Pagan<br>
<b>Sent:</b> Tuesday, October 15, 2013 11:16 AM<br>
<b>To:</b> <a href="mailto:cisco-voip@puck.nether.net">cisco-voip@puck.nether.net</a><br>
<b>Subject:</b> [cisco-voip] CCM Trace Questions | MediaMgr<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Hey Folks… <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I have a few trace questions I’m hoping someone can help me with.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Is there a specific CCM trace entry that corresponds to the moment where the Media Exchange Timeout timer is stopped? From what I understand, the timer begins when a new MediaManager process is created for the AuConnect request, but there
doesn’t seem to be any obvious moment when the timer is stopped during a successful media connection. Would it be at the “AuConnectInfo, audio, CI (xxxxxx, xxxxxx)”? The purpose of having this would be to quickly identify the moment a successful media connection
was established during situations where reviewing signaling transactions for media capabilities isn’t exactly required.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">With regards to MediaManager and its region capabilities pre-check, is there a matrix or any document that provides the capability numbering to codec mapping? I’m not referring to SDP dynamic payload mapping, but specifically the “preCheckCapabilities”
line in a CCM trace.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks a lot ahead of time.<o:p></o:p></p>
<p class="MsoNormal"><br>
- Daniel<o:p></o:p></p>
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