[asterisk-users] RE: yet another faxing issue (outbound only, via ATA)

[Lacy Moore - Aspendora]

On 1/2/07, Bill Gibbs <bgibbs at edurotech.com> wrote:
>
>  Echo cancel: yes (and zap show channel confirms it's enabled)
> I would think if echo cancel was the problem incoming faxes would fail as
> well?
>

This is only a guess.  The Sangoma is detecting the fax when it receives it,
and is turning off echo cancel.  However, when box b sends via IAX2 or
SIP to box a, the Sangoma no longer knows that it is a fax transmission and
is continuing echo cancellation.  The Cisco 3660 recognizes that it is a fax
and turns off echo (or doesn't have echo cancellation).

Question:  If you turn OFF echo cancellation, does it work then?
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