I'm relatively new to Asterisk/trixbx but I'm having issues on serveral servers that were installed recently with random echo on calls
The echo is intermittent and happens on external lines only. Each machine has either Sangoma A200 or A500 cards with no hardware cancellation built in.
I have downloaded and isntalled OSLEC echo cancellation software and it appears to have helped but echo is still intermittent.
I'm looking for directions where to look to troubleshoot or even how to begin this process as these echo calls are extremely random.