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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">It’s only phones from this location.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I’ll give the queries a try in a little bit and see what I can see.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";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""> Wes Sisk [mailto:wsisk@cisco.com]
<br>
<b>Sent:</b> Wednesday, November 02, 2011 1:25 PM<br>
<b>To:</b> Wellnitz, Erick A.<br>
<b>Cc:</b> cisco-voip@puck.nether.net<br>
<b>Subject:</b> Re: [cisco-voip] no audio for 10 seconds<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">good observation on the PVDM3's it could be an IOS DSP problem. Do phones from other locations call through that gateway?<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">how about this:<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"># find 9971 model<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">admin:run sql select first 10 * from typemodel where name like '%9971%'<br>
enum name tkclass moniker showindevicedefaults defaultdtmfcapability tkrisclass tksubclass <br>
==== ========== ======= ================ ==================== ===================== ========== ========== <br>
493 Cisco 9971 1 MODEL_Cisco_9971 t 10 1 1 <o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"># find 10x 9971 phones<br>
admin:run sql select first 10 pkid,name,description from device where tkmodel=493<br>
pkid name description <br>
==================================== =============== =========== <br>
bfc01793-c71a-4207-ba41-ef7c81d966d7 SEP44E4D9449BB4 Auto 86102 <br>
<br>
# find CDR's based on devicename from last query<br>
admin:run sql car select origdevicename,duration,orignumberpacketsreceived,datetimeconnect,datetimedisconnect,destnumberpacketssent,datetimeorigination from tbl_billing_data where origdevicename in ("SEP44E4D9449BB4","SEP44E4D9449BB5")<br>
origdevicename duration orignumberpacketsreceived datetimeconnect datetimedisconnect destnumberpacketssent datetimeorigination <br>
============== ======== ========================= =============== ================== ===================== =================== <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">import the final output into excel. compare packetssent and packetsreceived. compare packet counts to duration. compare duration to datetimedisconnect-datetimeconnect.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">/wes<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">On Nov 2, 2011, at 12:25 PM, Wellnitz, Erick A. wrote:<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Only reported on the 9971. No consistency to the issue. </span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">We’ve tried a selective firmware update to 9-2-2 without success.</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">We have checked for possible delays in call setup with MGCP, Q.931 and SIP with no clues or even momentary delays in the setup.</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">We have exhausted tweak options for the QSIG integration (timers, etc.)</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">We have attempted to recreate the issue without success even with a phone known to experience the issue.</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Unfortunately we don’t have the tools available to determine if we’re experiencing troubles with the RTP stream initialization, especially seeing as the issue
is intermittent.</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">The one thing which stands out to me is that we have two other locations with the 9971 and they are not experiencing these issues. Only difference here is
the PBX integration with QSIG. This site is also the only one with PVDM3.</span><o:p></o:p></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> </span></b><o:p></o:p></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">To:</span></b><span class="apple-converted-space"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> </span></span><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">Wellnitz,
Erick A.<br>
<b>Cc:</b><span class="apple-converted-space"> </span><a href="mailto:cisco-voip@puck.nether.net">cisco-voip@puck.nether.net</a><br>
<b>Subject:</b><span class="apple-converted-space"> </span>Re: [cisco-voip] no audio for 10 seconds</span><o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">Hi Erick,<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">Based on history you're a pretty enterprising. Any insight on what you've checked so far?<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">Is it only reported on 9971's? Is there any other consistency in the reports thus far? <o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">One of my favorite approaches to get a bit of insight on this type of issue is CMR data. Look at CMR's for "simple" calls - direct call, connection, duration hangup; no mute/transfer/hold/park/etc. If you're using fixed packet rate audio
codec (not ilbc) then the packets sent/received should be linearly proportional to call duration barring a few special situations.<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">Assuming 20packets per second are the number of packets received appropriate for the duration of the call? <o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">If the packet counts are correct then it's an audio cut through issue on the gateway or audio rendering issue inside the phone.<o:p></o:p></p>
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<p class="MsoNormal">gateway concerns: call going into connected state, any progress indicators exchanged (affect audio cut through timing)<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">If the packet counts are off then there is a network issue.<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">/wes<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">On Nov 2, 2011, at 11:46 AM, Wellnitz, Erick A. wrote:<o:p></o:p></p>
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<p class="MsoNormal"><br>
<br>
<br>
<o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">All, especially you really smart guys at Cisco…</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> </span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">We’re at a loss for where to continue looking for a potential cause on a very intermittent issue.</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> </span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">Mixed 9971 and 7975 environment with shared lines. Inbound calls come into our old (and temporary) Siemens PBX. Cross a QSIG trunk group to Cisco 3945 with PVDM3-192</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> </span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">Caller on our Cisco side places a call. They hear ringback. Call connects without audio for about 10 seconds.</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> </span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">We couldn’t find anything similar to this in bug toolkit. </span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> </span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">9971 firmware: 9-2-1</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">CUCM Ver: 8.0.3.21900</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> </span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">SR<span class="apple-converted-space"> </span></span><span style="font-size:9.0pt;font-family:"Arial","sans-serif"">619601919</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Arial","sans-serif""> </span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Arial","sans-serif"">We have a laundry list of issues with the 9971 model but this is currently the most urgent.</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> </span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> </span><o:p></o:p></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#333333">ERICK A. WELLNITZ<span class="apple-converted-space"> </span></span></b><span style="font-size:10.0pt;font-family:"Arial","sans-serif""><br>
<span style="color:#333333">Network Engineer</span><br>
<b><span style="color:#83A6BD">Katten Muchin Rosenman LLP</span></b><br>
<span style="color:#333333">525 W. Monroe Street / Chicago, IL 60661-3693</span><br>
<span style="color:#333333">p / (312) 577-8041<span class="apple-converted-space"> </span></span><br>
</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><a href="mailto:erick.wellnitz@kattenlaw.com"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#333333">erick.wellnitz@kattenlaw.com</span></a></span><span class="apple-converted-space"><span style="font-size:10.0pt;font-family:"Arial","sans-serif""> </span></span><span style="font-size:10.0pt;font-family:"Arial","sans-serif"">/<span class="apple-converted-space"> </span></span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><a href="http://www.kattenlaw.com/"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:#333333">www.kattenlaw.com</span></a></span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> </span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:13.5pt;font-family:"Helvetica","sans-serif"">_______________________________________________<br>
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