Unanswered Question
Feb 19th, 2008

We are having a very strange echo issue at a remote location and we can not seem to figure out the cause nor can our TAC engineer at this point.

The hardware deployment is as follows:

3845 Gateway IOS Version 12.4(11)T4

Two 3750 Switches in a stack configuration running IOS Version 12.2(25r)

The problem is that some (not all) of the end users are having echo. It will even happen on station to station calls. Doing a packet capture, on an call that has echo, you see duplicate packets during the conversation. I saw the post about the DSP issue and our gateway was running a firmware version that had the echo issue but we did an IOS upgrade on the gateway that did upgrade the DPS firmware but they are still having echo.

Out of ideas so I thought I would post here. Sorry, posted in the wrong forum the first time :-(

I have this problem too.
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