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<DIV><SPAN class=538091814-07062006>TAC says we may be experiencing this
bug:</SPAN></DIV>
<DIV><SPAN class=538091814-07062006><FONT face=Arial></FONT> </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></SPAN><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; mso-layout-grid-align: none"><FONT face=Arial><SPAN
style="FONT-SIZE: 12pt">CCNA<SPAN style="mso-spacerun: yes">
</SPAN>CCVP</SPAN></FONT></P>
<P class=MsoNormal
style="MARGIN: 0in 0in 0pt; mso-layout-grid-align: none; mso-pagination: none"><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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