[cisco-voip] how to load dsp firmware

[Erick Bergquist]

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. 

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. 

----- Original Message ----
From: "Ruttman, Peter G." <PRuttman at foley.com>
To: cisco-voip at puck.nether.net
Sent: Wednesday, June 7, 2006 9:22:55 AM
Subject: [cisco-voip] how to load dsp firmware

Message      TAC says we may be experiencing this  bug:
  
  CSCsd54344: DSP: Persistent echo heard on c5510 DSPs with 4.4.13 DSPware or  higher
 Symptom:
 Under certain circumstances, continual echo may be heard. The echo is  perisitent and the DSP echo canceller does not converge.
  
 Conditions:
 DSPware 4.4.13 or higher on C5510 DSPs are required to experience this  problem.
  
 Workaround:
 Downgrading DSPware to 4.4.12 or earlier resolves the echo issue.
  
 TAC send is firmware and  these instructions:
 INSTRUCTIONS:
 1. Put the file on the flash.
 2. Reload the router.
 3. Verify new DSP version ' sh voice dsp' (should be  4.4.18)
 3. IMPORTANT: Remove file from flash after  verification
  
 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?
 Thanks,
 Pete  Ruttman

  CCNA   CCVP
 Senior Network  Engineer
 Foley & Lardner LLP

  

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