Does anyone have any ideas how to cure echo on an ISDN2 with B410P?
The card is supposed to have HW Echo Cancellation but customer is complaining of terrible echo (some calls not all).
I have echocancel=yes in misdn.conf
I assume I cannot use FXOTUNE or HPEC?
We are on a knife edge with this install and one way we will get paid and the other way we will get told to take it out.
I wrongly believed echo would not be a problem when I bought a Digium card with hardware echo cancellation.