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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Got a couple questions:<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'>-You mentioned the problem was on 7975 and 7911 phones, does
this imply that you have a 7961 or some other model that doesn’t experience
this?<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'>-Also, Is the echo heard only on calls out the GW? Are IP phone
to IP Phone calls ok?<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'>-Who hears the echo? Both sides of the call or only one side? (If
only one side, which side)<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'>-Are the callers hearing echo using headsets or speaker phone
with the volume turn up? If they switch to handsets does the problem go away?<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'>Echo is an analog problem, so we should try and focus on the
analog elements. This means the DSPs in the Phones (resolved by firmware
upgrades), DSPs in the GW (IOS upgrades), or potentially a Telco issue.<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>
<div>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Chris Ward <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Cisco Systems Inc. <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Customer Support Engineer<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Unified Communication Infrastructure<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Boxborough, MA <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>9:00am - 6:00pm Eastern <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>978-936-0217<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><a href="mailto:chrward@cisco.com">chrward@cisco.com</a><o:p></o:p></span></p>
</div>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<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-bounces@puck.nether.net
[mailto:cisco-voip-bounces@puck.nether.net] <b>On Behalf Of </b>Djokic Sinisa<br>
<b>Sent:</b> Wednesday, July 23, 2008 9:32 AM<br>
<b>To:</b> 'Ed Leatherman'<br>
<b>Cc:</b> 'cisco voip'<br>
<b>Subject:</b> Re: [cisco-voip] echo in CUCM 6.1 !!!<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'>yup..<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'>i've read all about it..<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'>but we cannot make the situation any better..<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'>we played with the config on VG, and upgraded IOS on it..<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'>but no help..<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'>i mentioned CUCM and phones just to provide whole scenario..<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'>although, maybe firmware in phones can have something to do with
it, even i don't think it should..<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'>and, we tested by placing calls to that " trouble outside
numbers " from another CUCM system, from another PRI, and no echo is
heard..<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'>so, it can only be problem on system in place, or maybe TELCO PRI..<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'>thanx..<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'>regards..<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'><o:p> </o:p></span></p>
<div>
<p class=MsoNormal><strong><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";
color:navy'>Sinisa Djokic</span></strong><span style='font-size:10.0pt;
font-family:"Verdana","sans-serif";color:navy'> </span><span style='color:navy'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";
color:navy'>System Engineer</span><span style='color:navy'><br>
</span><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";
color:navy'>CCNP,CCDA,CQS-CWLDS,CS-CIPTDS,CS-CIPCCES Cisco Certified</span><span
style='color:navy'><o:p></o:p></span></p>
<p class=MsoNormal><span style='color:navy'> <o:p></o:p></span></p>
</div>
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<tr>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal><span style='color:navy'><img border=0 width=60 height=94
id="_x0000_i1027" src="cid:image001.gif@01C8ECA8.595C9640"><o:p></o:p></span></p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal><span style='color:navy'> <o:p></o:p></span></p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal><span style='font-size:7.5pt;font-family:"Verdana","sans-serif";
color:navy'>MDS Informaticki inzenjering</span><span style='color:navy'><br>
</span><span style='font-size:7.5pt;font-family:"Verdana","sans-serif";
color:navy'>Bul. Arsenija Carnojevica 170</span><span style='color:navy'><br>
</span><span style='font-size:7.5pt;font-family:"Verdana","sans-serif";
color:navy'>11070 Novi Beograd, Serbia</span><span style='color:navy'><br>
</span><span style='font-size:7.5pt;font-family:"Verdana","sans-serif";
color:navy'>Tel: +381 11 2015 200, 2015 273</span><span style='color:navy'><br>
</span><span style='font-size:7.5pt;font-family:"Verdana","sans-serif";
color:navy'>Fax: +381 11 3194 954</span><span style='color:navy'><br>
</span><span style='font-size:7.5pt;font-family:"Arial","sans-serif";
color:navy'><a href="http://www.mds.rs">www.mds.rs</a></span><span
style='color:navy'><br>
</span><span style='font-size:7.5pt;font-family:"Arial","sans-serif";
color:navy'><a href="mailto:sdjokic@mds.rs">sdjokic@mds.rs</a></span><span
style='color:navy'><o:p></o:p></span></p>
</td>
</tr>
</table>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:navy'><o:p> </o:p></span></p>
<div>
<div class=MsoNormal align=center style='text-align:center'>
<hr size=2 width="100%" align=center>
</div>
<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"'> Ed Leatherman
[mailto:ealeatherman@gmail.com] <br>
<b>Sent:</b> Wednesday, July 23, 2008 2:51 PM<br>
<b>To:</b> Djokic Sinisa<br>
<b>Cc:</b> cisco voip<br>
<b>Subject:</b> Re: [cisco-voip] echo in CUCM 6.1 !!!</span><o:p></o:p></p>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<div>
<p class=MsoNormal style='margin-bottom:12.0pt'>Sinisa,<br>
<br>
Have you seen the troubleshooting guides on <a href="http://cisco.com">cisco.com</a>
regarding echo? <br>
<a
href="http://www.cisco.com/en/US/tech/tk652/tk698/technologies_tech_note09186a0080149a1f.shtml">http://www.cisco.com/en/US/tech/tk652/tk698/technologies_tech_note09186a0080149a1f.shtml</a><br>
<br>
The echo is probably less to do with your CUCM and IP Phones and more to do
with the gateway and the outside telephone systems your people are calling.<br>
<br>
Ed<o:p></o:p></p>
<div>
<p class=MsoNormal>On Wed, Jul 23, 2008 at 8:19 AM, Djokic Sinisa
<sdjokic@mds.rs> wrote:<o:p></o:p></p>
<div>
<div>
<p><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'> </span><o:p></o:p></p>
<p><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>hi guys..</span><o:p></o:p></p>
<p><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>did anybody
had issues with echo in system with CUCM 6.1.2 and 2821 with 12.4 code ( varios
version - 12.4.9T6, 12.4.15T etc. ), vwic-1mft-t1/e1 card and PVDM2-48..</span><o:p></o:p></p>
<p><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>the echo can
be heard when call is placed to certain phone numbers, and it is noticed on
7975 and 7911 phones - the only phone types in system..</span><o:p></o:p></p>
<p><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'> </span><o:p></o:p></p>
<p><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>we changed
everything we could in VG config, from echo cancel coverage, IOS image to
attenuation..and nothing helped..</span><o:p></o:p></p>
<p><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'> </span><o:p></o:p></p>
<p><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'> </span><o:p></o:p></p>
<p><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>any ideas..</span><o:p></o:p></p>
<p><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'> </span><o:p></o:p></p>
<p><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'> </span><o:p></o:p></p>
<p><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>thanx..</span><o:p></o:p></p>
<p><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'> </span><o:p></o:p></p>
<p><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'> </span><o:p></o:p></p>
<p><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>regards..</span><o:p></o:p></p>
<p><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'> </span><o:p></o:p></p>
<p><b><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>Sinisa
Djokic</span></b><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>
</span><o:p></o:p></p>
<p><span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>System
Engineer</span><br>
<span style='font-size:10.0pt;font-family:"Verdana","sans-serif"'>CCNP,CCDA,CQS-CWLDS,CS-CIPTDS,CS-CIPCCES
Cisco Certified</span><o:p></o:p></p>
<p> <o:p></o:p></p>
<table class=MsoNormalTable border=0 cellpadding=0>
<tr>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p><img border=0 width=60 height=94 id="_x0000_i1025"
src="cid:image001.gif@01C8ECA8.595C9640"><o:p></o:p></p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p> <o:p></o:p></p>
</td>
<td style='padding:.75pt .75pt .75pt .75pt'>
<p><span style='font-size:7.5pt;font-family:"Verdana","sans-serif"'>MDS
Informaticki inzenjering</span><br>
<span style='font-size:7.5pt;font-family:"Verdana","sans-serif"'>Bul.
Arsenija Carnojevica 170</span><br>
<span style='font-size:7.5pt;font-family:"Verdana","sans-serif"'>11070 Novi
Beograd, Serbia</span><br>
<span style='font-size:7.5pt;font-family:"Verdana","sans-serif"'>Tel: +381 11
2015 200, 2015 273</span><br>
<span style='font-size:7.5pt;font-family:"Verdana","sans-serif"'>Fax: +381 11
3194 954</span><br>
<span style='font-size:7.5pt;font-family:"Arial","sans-serif"'><a
href="http://www.mds.rs" target="_blank">www.mds.rs</a></span><br>
<span style='font-size:7.5pt;font-family:"Arial","sans-serif"'><a
href="mailto:sdjokic@mds.rs" target="_blank">sdjokic@mds.rs</a></span><o:p></o:p></p>
</td>
</tr>
</table>
<p> <o:p></o:p></p>
</div>
</div>
<p class=MsoNormal style='margin-bottom:12.0pt'><br>
_______________________________________________<br>
cisco-voip mailing list<br>
<a href="mailto:cisco-voip@puck.nether.net">cisco-voip@puck.nether.net</a><br>
<a href="https://puck.nether.net/mailman/listinfo/cisco-voip" target="_blank">https://puck.nether.net/mailman/listinfo/cisco-voip</a><o:p></o:p></p>
</div>
<p class=MsoNormal><br>
<br clear=all>
<br>
-- <br>
Ed Leatherman<br>
Senior Voice Engineer<br>
West Virginia University<br>
Telecommunications and Network Operations <o:p></o:p></p>
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