Asterisk - Hardware echo canceler Fax/DTMF Debugging (AFT A101/2/3/8/Analog)

If you are experiencing ECHO or DTMF/Fax problems on your system using a card only when the hardware echo canceler is enabled, please follow the instructions below on how to capture an echo debug file.

The hardware echo canceler chip has a debug feature where a DEBUG Monitor will capture chip debug data during active calls. The captured debug binary file can be sent to Sangoma for further processing and analysis.

Before proceeding you should also confirm that Is my Hardware echo canceller running?

1. Establish a call that has an echo problem noise or DTMF problem
2. Determine the call channel number by running "show channels" on Asterisk CLI:
   CLI> show channels
3. Run a echo canceler debug utility on that channel
   
   #>wan_ec_client wanpipe1 monitor
   
   Where is a channel number obtained in step 2.
4. After 2 minutes of talk and noticeable echo, or 30 seconds of bad DTMF or noise.
   Obtain the debug statistics using:
   
   #>wan_ec_client wanpipe1 monitor
   
   The wan_ec_client will write a binary file in your local directory.