Hi Walter,

Walter Klomp wrote:
> Hi,
>
> I am trying to send faxes using spandsp and callweaver over T.38, using the
> example from here:
> http://www.callweaver.org/wiki/Faxing+with+CallWeaver
>
> But sending multi-page faxes fail (unless I switch off ECM).
>
> I obviously googled my ass off on this, and nowhere is there a solution for
> this. I stumbled upon switching off ecm by accident and it seems to work
> (with my 1 AS5300 gateway), but if I want to use this on a larger scale I
> don't know what switching off ECM does to the quality...
>   
I have no idea why, but I would very much like to investigate. We seem 
to get different behaviour using T.38 with different Cisco boxes. You 
only mentioned sending, but what about receiving? Can you try a 
multi-page FAX with both ECM on and off, capture the packets with 
wireshark, tcpdump or similar, and e-mail me the resulting PCAP file.

Stev

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