[asterisk-users] About FAX and PAP2

[Kevin P. Fleming]

Lukas wrote:
>     Hi. I've just configured a PAP2 where i wanna receive faxes, but i
> don't know how to disable echo-cancel option only in a misdn channel,
> 'cause i need it for the voice calls but not for faxes. I've just read
> that it's so necessary to set it up with no echo-cancel support. isn't
> it? I'm so lost about it. Thanks.

All decent echo cancelers will disable themselves when notice a FAX
call, because FAX machines generate the proper tones for this to happen.