<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>Here's another idea.. if you recently upgraded (the bug id has 12.4(7) as first found version) and then started having the issue, maybe you can downgrade the IOS back to where you were until a fixed IOS is available with that version DSPware. <br><br>12.4(8) is out , but I do not know what DSPware version it has. Does anyone know if there is a IOS / DSPWare version matrix anywhere? I have had good, bad, and very bad results with 12.4 versions so far so am cautious when using them and keep my fingers and toes crossed. <br><br>----- Original Message ----<br>From: "Ruttman, Peter G." <PRuttman@foley.com><br>To: cisco-voip@puck.nether.net<br>Sent: Wednesday, June 7, 2006 9:22:55 AM<br>Subject: [cisco-voip] how to load dsp
firmware<br><br><title>Message</title>
<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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