[Asterisk-Users] Echo worse after new echo patch

[ed at rubright.net]

Hi all,

I was excited to see the announcement on the list regarding the fix for 
the echo problems on Digium FXO cards!

I have 2 X101P's, TDM400P with 4 FXS modules and couple of XLite 
softphones.  A few months back,I had gone thru the recommendation on the 
list to remove echo from the SIP phones(I never did have any echo on the 
TDM400P FXS phones), and had removed about 90% of the echo.  There was 
still some occassionally that I couldn't figure out how to get rid of.

I used MARK2 without the AGRESSIVE cancel option with the following 
zaptel.conf settings before the latest path:

echocancel=yes
echocancelwhenbridged=yes
echotraining=yes
rxgain=8.0

after applying the patch my settings are the same except for:

echotraining=800


Problem:

I'm seeing is that echo is actually worse on the XLite SIP 
phones!  Also, my wife is telling me that the Vtech 5.8 Ghz cordless 
attached to the TDM400P now actually has some echo, when it never did 
before.  (I received the infamous, "What did you do to the phone...it 
sounds terrible!")

Any ideas or suggestions?

Will the path affect the rxgain setting?  Will that need to be 
re-adjusted?

What would cause echo to show up on the TDM400P FXS phones?

Is the success people are seeing with the echo patch using the AGRESSIVE 
suppressor?


Thanks in advance,
Ed Rubright