<html><head><style type="text/css"><!-- DIV {margin:0px} --></style></head><body><div style="font-family:times new roman, new york, times, serif;font-size:12pt"><div style="font-family: times new roman,new york,times,serif; font-size: 12pt;"><div>On some modules and DSP models, and IOS versions the DSPWare can be changed by putting special files on the router flash the router looks for but they need to stay on flash to be used. I have personally only seen this sort of fix work once in my experiences where this was needed. The file does need to stay on the flash to be used from my experiences but different hardware/PVDMs may be different.<br><br>In the instructions below and in bug id, it states to downgrade to 4.4.12 or earlier , but in the instructions for the verify step it states it should be 4.4.18 version. That doesn't match up.<br><br>Did the file get transferred to the router right - it's not corrupt, etc. I would let the engineer know that the special file did not
work for you. <br><br>What is your actual echo issue you are experiencing? What version IOS? What type of voice port configuration (echo cancelling commands, input gain, output atten, etc)? Is there a certain call-flow the echo occurs? Who hears the echo (calling party, called party, both?). Only external calls or do you have it on internal calls also (IP to IP Phone)? Echo can be a very complex thing to fix at times.<br><br>----- Original Message ----<br>From: Matt Slaga (US) <Matt.Slaga@us.didata.com><br>To: McLean Pickett <McLean.Pickett@ptgcorp.com>; "Ruttman, Peter G." <PRuttman@foley.com>; cisco-voip@puck.nether.net<br>Sent: Wednesday, June 7, 2006 3:02:49 PM<br>Subject: Re: [cisco-voip] how to load dsp firmware<br><br><title>Message</title>
<div dir="ltr" align="left"><span class="312040120-07062006"><font color="#0000ff" face="Arial" size="2">DSPs are not user upgradeable, they must be
replaced. Open a TAC case referencing your bug ID.and see if they can
replace them.</font></span></div><br>
<div class="OutlookMessageHeader" dir="ltr" align="left" lang="en-us">
<hr tabindex="-1">
<font face="Tahoma" size="2"><b>From:</b> cisco-voip-bounces@puck.nether.net
[mailto:cisco-voip-bounces@puck.nether.net] <b>On Behalf Of </b>McLean
Pickett<br><b>Sent:</b> Wednesday, June 07, 2006 11:25 AM<br><b>To:</b> Ruttman,
Peter G.; cisco-voip@puck.nether.net<br><b>Subject:</b> Re: [cisco-voip] how to
load dsp firmware<br></font><br></div>
<div></div>
<div dir="ltr" align="left"><span class="388122415-07062006"><font face="Courier New" size="2">Pete -</font></span></div>
<div dir="ltr" align="left"><span class="388122415-07062006"><font face="Courier New" size="2"></font></span> </div>
<div dir="ltr" align="left"><span class="388122415-07062006"><font face="Courier New" size="2">I was given explicit direction not to remove the file from firmware
as the DSP's would revert to the old firmware. </font></span></div>
<div dir="ltr" align="left"><span class="388122415-07062006"><font face="Courier New" size="2"></font></span> </div>
<div dir="ltr" align="left"><span class="388122415-07062006"><font face="Courier New" size="2">McLean</font></span></div><br>
<div class="OutlookMessageHeader" dir="ltr" align="left" lang="en-us">
<hr tabindex="-1">
<font face="Tahoma" size="2"><b>From:</b> cisco-voip-bounces@puck.nether.net
[mailto:cisco-voip-bounces@puck.nether.net] <b>On Behalf Of </b>Ruttman, Peter
G.<br><b>Sent:</b> Wednesday, June 07, 2006 10:23 AM<br><b>To:</b>
cisco-voip@puck.nether.net<br><b>Subject:</b> [cisco-voip] how to load dsp
firmware<br></font><br></div>
<div></div>
<div><span class="538091814-07062006">TAC says we may be experiencing this
bug:</span></div>
<div><span class="538091814-07062006"><font face="Arial"></font> </span></div>
<div>
<p>CSCsd54344: DSP: Persistent echo heard on c5510 DSPs with 4.4.13 DSPware or
higher</p>
<p>Symptom:</p>
<p>Under certain circumstances, continual echo may be heard. The echo is
perisitent and the DSP echo canceller does not converge.</p>
<p><font face="Arial"></font> </p>
<p>Conditions:</p>
<p>DSPware 4.4.13 or higher on C5510 DSPs are required to experience this
problem.</p>
<p><font face="Arial"></font> </p>
<p>Workaround:</p>
<p>Downgrading DSPware to 4.4.12 or earlier resolves the echo issue.</p>
<p><font face="Arial"></font> </p>
<p><span class="538091814-07062006"><font face="Arial">TAC send is firmware and
these instructions:</font></span></p><span class="538091814-07062006">
<p><font face="Arial">INSTRUCTIONS:</font></p>
<p><font face="Arial">1. Put the file on the flash.</font></p>
<p><font face="Arial">2. Reload the router.</font></p>
<p><font face="Arial">3. Verify new DSP version ' sh voice dsp' (should be
4.4.18)</font></p>
<p><font face="Arial">3. IMPORTANT: Remove file from flash after
verification</font></p>
<p><font face="Arial"></font> </p>
<p><span class="538091814-07062006"><font face="Arial">However, I did the show voice
dsp and saw no change in the dsp version from before getting the new dsp
firmware. Can someone tell me if this is the correct way to load firmware
on an NM-HDV2 on a 3745 voice gateway?</font></span></p>
<p><span class="538091814-07062006"><font face="Arial">Thanks,</font></span></p></span>
<p><font face="Arial"><span class="894004418-18052006">P</span>ete
Ruttman</font></p></div>
<div align="left">
<p class="MsoNormal" style="margin: 0in 0in 0pt;"><font face="Arial"><span style="font-size: 12pt;">CCNA<span style="">
</span>CCVP</span></font></p>
<p class="MsoNormal" style="margin: 0in 0in 0pt;"><font face="Arial"><span style="font-size: 12pt;">Senior Network
Engineer</span></font></p>
<p class="MsoNormal" style="margin: 0in 0in 0pt;"><font face="Arial"><span style="font-size: 12pt;">Foley & Lardner LLP</span></font></p></div>
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