[cisco-voip] how to load dsp firmware

[Ruttman, Peter G.]

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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