[Asterisk-Users] Does anyone have faxes working well with X100P and TDM40B cards?

[Jonathan Biggs]

Have a HP Officejet combo working OK with inbound fax
detection, receiving faxes, and sending them
using X100p and TDM400P, I just make sure I use the
"d" option on the dial string, for outbound and also
inbound on the FAX detection.
have the "d" option on the internal fax redirection,
and have setup 8 as outbound dialing for data calls
(both modem and fax).

Did have problems when I had a mailbox configured on
the line with the modem, seems the VMWI logic set line
in a weird state the modem could not detect dial tone.





--- Jim Sneeringer <j at snee.us> wrote:
> When I send or receive faxes with a modem, the faxes
> are stretched and have
> missing information.
> 
> Here are the things I have tried so far:
> 
>  - verified that the 2.4 GHz P4 is not overloaded
>  - tried different Asterisk channels for both FXO
> and FXS
>  - turned off echocancel
>  - bumped up rxgain and txgain
>  - tried different fax software (Windows vs. WinFax)
>  - confirmed that everything works fine when
>    the faxes are not routed through Asterisk.
> 
> One person told me I need ECM modems, but I don't
> have one to try and I
> can't see asking my customers to get new modems.
> Also, what if the other end
> of the connection doesn't have ECM? I would really
> like to get Asterisk to
> work with ordinary fax modems.
> 
> Why does Asterisk not work as well with fax modems
> as any other phone
> system?
> 
> Thanks.
> 
> Jim
> 
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