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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>I’m running the CMM with 12.4.7a
that has DSPware 4.4.15 does the newest 12.4 have the 4.4.18?<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Scott<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
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10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
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<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'>
cisco-voip-bounces@puck.nether.net [mailto:cisco-voip-bounces@puck.nether.net] <b><span
style='font-weight:bold'>On Behalf Of </span></b>Steve G<br>
<b><span style='font-weight:bold'>Sent:</span></b> Thursday, May 10, 2007 9:57
AM<br>
<b><span style='font-weight:bold'>To:</span></b> Matthew Melbourne<br>
<b><span style='font-weight:bold'>Cc:</span></b> cisco-voip@puck.nether.net<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [cisco-voip] Echo on
IP Phones through PRI</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><font size=2 face="Times New Roman"><span style='font-size:10.0pt'>CSCsd54344<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-bottom:12.0pt'><font size=3
face="Times New Roman"><span style='font-size:12.0pt'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><span class=gmailquote><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>On 5/10/07, <b><span style='font-weight:bold'>Matthew
Melbourne</span></b> <<a href="mailto:matt@melbourne.org.uk">matt@melbourne.org.uk</a>>
wrote:</span></font></span> <o:p></o:p></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Thanks Steve. We have an upgrade planned for our voice gateways in an<br>
forthcoming maintenance window, where we'll try 12.4(latest) mainline.<br>
Are you aware of any bugs which document this issue?<br>
<br>
Cheers,<br>
<br>
Matt<br>
<br>
On 09/05/07, Steve G <<a href="mailto:smgustafson@gmail.com">smgustafson@gmail.com</a>>
wrote:<br>
> 12.3(14) will deffinietly give you echo issues. it is the DSP
firmware.<br>
> either get new DSP firmware from TAC, or upgrade IOS. I am
using 12.4(8)b<br>
> with no issues.<br>
><br>
> Steve<br>
><br>
><br>
> On 4/18/07, Matthew Melbourne <<a href="mailto:matt@melbourne.org.uk">matt@melbourne.org.uk</a>>
wrote:<br>
> ><br>
> > We are getting sporadic issues from users on IP phones who are
hearing<br>
> > echo on external calls. From this document is would suggest that echo
<br>
> > on IP Phones is caused by hybrid echo and not any local acoustic
echo.<br>
> ><br>
> ><br>
> <a
href="http://www.cisco.com/warp/public/788/voice-qos/echo_ipphone_gateway.html">http://www.cisco.com/warp/public/788/voice-qos/echo_ipphone_gateway.html
</a><br>
> ><br>
> > The MGCP-controlled voice gateways are all running 12.3(14)T7 with
DSP<br>
> > firmware 4.4.708. In CallManager (4.1(3)SR2), echo cancellation is on<br>
> > for each port, with a "default" echo cancellation coverage
of 64ms. <br>
> > Input gain and output attenuation are set to 0dB.<br>
> ><br>
> > I have seen suggestions to include the "echo-cancel erl
worst-case 3"<br>
> > command on the voice ports. Can this help in situations of occasional
<br>
> > echo?<br>
> ><br>
> > Are there any other parameters changes which could help? Could it be
a<br>
> > code/DSP firmware issue? I haven't found a specific echo-related bug<br>
> > relating to this particular IOS and its embedded DSP firmware. <br>
> ><br>
> > On occasions, the start of the call is fine but echo comes and goes<br>
> > during the call.<br>
> ><br>
> > Is there a quick way of finding out which voice gateway a call is<br>
> > terminated on (we have 8, and all could be used in a round-robin <br>
> > fashion for outbound calls).<br>
> ><br>
> > Cheers,<br>
> ><br>
> > Matt<br>
> ><br>
> > --<br>
> > Matthew Melbourne<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">https://puck.nether.net/mailman/listinfo/cisco-voip
</a><br>
> ><br>
><br>
><br>
<br>
<br>
--<br>
Matthew Melbourne<o:p></o:p></span></font></p>
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